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Journal articles on the topic 'Reactor'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Omoregbe, Osaze, Artur Jacek Majewski, and Robert Steinberger-Wilckens. "CO₂ Methanation over an Ni/YSZ Catalyst: Impact of Altering the Catalyst Bed Ratio in Two Reactors in Series." ECS Meeting Abstracts MA2023-01, no. 28 (2023): 2841. http://dx.doi.org/10.1149/ma2023-01282841mtgabs.

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CO2 methanation is a promising method of preventing the wastage of excess energy generated from renewable electricity sources such as wind and solar. The excess energy is used to power an electrolytic cell to produce H2 which is then reacted with CO2 to form CH4 (chemical energy). The stored CH4 can be converted back to electric energy and released into the power grid whenever energy demand exceeds production. To achieve the best result, a suitable catalyst and good reactor design are crucial. Therefore, this study investigated the effect of varying the catalyst ratio in two reactors in series

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2

Bankovic-Ilic, Ivana, Marija Miladinovic, and Vlada Veljkovic. "Continuous reciprocating plate and packed bed multiphase reactors in biodiesel production: Advancements and challenges." Chemical Industry, no. 00 (2024): 10. http://dx.doi.org/10.2298/hemind230630010b.

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Biodiesel, a renewable and environmentally friendly alternative to conventional fossil fuels, has gained significant attention over the last two decades. Continuous production of biodiesel offers efficiency, productivity, and scalability advantages. This paper provides a concise overview of continuous reactor systems for biodiesel production, focusing on two specific systems-the reciprocating plate reactor and the packed bed reactor-subjects of the authors' extensive research. A thorough comparison of these reactors, spanning biodiesel yield, reaction kinetics, and conversion efficiency, under

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3

Lu, Ningning, and Donglai Xie. "Novel Membrane Reactor Concepts for Hydrogen Production from Hydrocarbons: A Review." International Journal of Chemical Reactor Engineering 14, no. 1 (2016): 1–31. http://dx.doi.org/10.1515/ijcre-2015-0050.

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AbstractMembrane reactors are attracting increasing attention for ultrapure hydrogen production from fossil fuel, integrating catalytic reaction and separation processes into one single unit thus can realize the removal of hydrogen or introduction of reactant in situ, which removes the thermodynamic bottleneck and improves hydrogen yield and selectivity. In this review, the state-of-the-art concepts for hydrogen production through membrane reactors are introduced, mainly including fixed bed membrane reactors, fluidized bed membrane reactors, and micro-channel membrane reactors, referring highe

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Elmaleh, S., T. I. Yoon, and A. Grasmick. "Influence of Macromixing on Organic Carbon Uptake and Solids Production by Aerobic Suspended Biomass." Water Science and Technology 17, no. 2-3 (1985): 209–19. http://dx.doi.org/10.2166/wst.1985.0131.

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The influence of macromixing on organic carbon uptake by aerobic suspended biomass has been investigated using two reactors operated in parallel, i.e. a perfectly mixed reactor and a compartmented reactor. Conversion determined on filtrated samples is identical in both of the reactors but with less solids production in the low-dispersed reactor. The reaction rate established on the perfectly mixed reactor shows an apparent first-order with influence of inlet concentration but this relation cannot be used in a mass balance over the compartmented reactor.

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Franklin, Simon. "Reactor reaction." Physics World 11, no. 5 (1998): 22. http://dx.doi.org/10.1088/2058-7058/11/5/20.

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6

Meeuwse, Petra, and Marit van Lieshout. "General Applicable Residence Time Distribution Model to Estimate Reaction Rates in a Rotor–Stator Spinning Disc Reactor." ChemEngineering 9, no. 1 (2025): 8. https://doi.org/10.3390/chemengineering9010008.

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Many designs of industrial reactors stem from designs from the 1960s–1970s. For a wide range of reactions, these designs lead to suboptimal reaction configurations due to limitations in heat- or mass-transfer. Process intensification has come up with a different approach, resulting in micro- and mini-reactors being safer and more cost-effective on a full industrial scale. However, based on the experience in the suboptimal reactor designs, the reaction rates of these reactions seem too low for full-scale reactions in a mini reactor. We suggest a test for the reaction rate based on a generalized

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7

Kotov, V. M. "FUSION REACTOR ON COLLIDING BEAMS." NNC RK Bulletin, no. 2 (June 30, 2020): 33–40. http://dx.doi.org/10.52676/1729-7885-2020-2-33-40.

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The paper is devoted to the problem of constructing nuclear power reactors based on the synthesis of light elements. This problem is currently subject to assessment under options of thermonuclear reactors operating with high-temperature plasma. In such reactors, plasma is isolated from the walls of the reaction chamber using a magnetic field. Even in advanced designs of thermonuclear reactors, temperature regime is far from the conditions for ensuring optimal interaction cross sections of the source nuclei. Despite many years of work, the task of efficient plasma isolation is difficult to solv

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8

Kong, Rui, Lingen Chen, Shaojun Xia, Penglei Li, and Yanlin Ge. "Minimization of Entropy Generation Rate in Hydrogen Iodide Decomposition Reactor Heated by High-Temperature Helium." Entropy 23, no. 1 (2021): 82. http://dx.doi.org/10.3390/e23010082.

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The thermochemical sulfur-iodine cycle is a potential method for hydrogen production, and the hydrogen iodide (HI) decomposition is the key step to determine the efficiency of hydrogen production in the cycle. To further reduce the irreversibility of various transmission processes in the HI decomposition reaction, a one-dimensional plug flow model of HI decomposition tubular reactor is established, and performance optimization with entropy generate rate minimization (EGRM) in the decomposition reaction system as an optimization goal based on finite-time thermodynamics is carried out. The refer

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Kong, Rui, Lingen Chen, Shaojun Xia, Penglei Li, and Yanlin Ge. "Minimization of Entropy Generation Rate in Hydrogen Iodide Decomposition Reactor Heated by High-Temperature Helium." Entropy 23, no. 1 (2021): 82. http://dx.doi.org/10.3390/e23010082.

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The thermochemical sulfur-iodine cycle is a potential method for hydrogen production, and the hydrogen iodide (HI) decomposition is the key step to determine the efficiency of hydrogen production in the cycle. To further reduce the irreversibility of various transmission processes in the HI decomposition reaction, a one-dimensional plug flow model of HI decomposition tubular reactor is established, and performance optimization with entropy generate rate minimization (EGRM) in the decomposition reaction system as an optimization goal based on finite-time thermodynamics is carried out. The refer

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10

Popa, Simona, Andra Tamas, Vasile Simulescu, Dorin Jurcau, Sorina Boran, and Giannin Mosoarca. "A Novel Approach of Bioesters Synthesis through Different Technologies by Highlighting the Lowest Energetic Consumption One." Polymers 13, no. 23 (2021): 4190. http://dx.doi.org/10.3390/polym13234190.

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Fatty acids esters have a wide application as bioplasticizers and biolubricants in different industries, obtained mainly in classic batch reactors, through an equilibrium complex reaction, that involves high temperatures, long reaction times, vigorously stirring, and much energy consumption. To overcome these shortcomings, we synthesized a series of fatty acid esters (soybean oil fatty acids being the acid components with various hydroxyl compounds) through novel low energy consumption technologies using a bubble column reactor, a microwave field reactor and for comparison meaning, a classic b

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11

Selvamony, Subash Chandra Bose. "Kinetics and Product Selectivity (Yield) of Second Order Competitive Consecutive Reactions in Fed-Batch Reactor and Plug Flow Reactor." ISRN Chemical Engineering 2013 (September 12, 2013): 1–17. http://dx.doi.org/10.1155/2013/591546.

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This literature compares the performance of second order competitive consecutive reaction in Fed-Batch Reactor with that in continuous Plug Flow Reactor. In a kinetic sense, this simulation study aims to develop a case for continuous Plug Flow Reactor in pharmaceutical, fine chemical, and related other chemical industries. MATLAB is used to find solutions for the differential equations. The simulation results show that, for certain cases of nonelementary scenario, product selectivity is higher in Plug Flow Reactor than Fed-Batch Reactor despite the fact that it is the same in both the reactors

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12

Avinash, Kumar Mishra, and Anitha G. S. Dr. "Nuclear Fusion Reactor – A Review Study." International Journal of Trend in Scientific Research and Development 4, no. 3 (2020): 690–95. https://doi.org/10.5281/zenodo.3892538.

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This paper aims to explode nuclear fusion reaction, the theory behind nuclear fusion reactors and countries with different types of fusion reactors along with their fusion theory involved. The energy generated from nuclear fusion reaction is much more huge as compared to nuclear fission reaction, so there have been many research going on this field to explode efficient way to extract this energy into electricity through fusion reactors. The advantages of nuclear fusion over fission is also been discussed and why do we need nuclear fusion energy. Nuclear fusion reactors are key to future energy

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13

Nidarsh, Prajay, and M. N. Bharath. "Nuclear Fusion Reactor- A Review." Journal of Mechanical Robotics 3, no. 3 (2018): 31–37. https://doi.org/10.5281/zenodo.2377262.

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Nuclear Fusion Reaction what actually happens in it , The history of Nuclear fusion reactors, contrasting nuclear fusion reactor power with other currently available energy resources, the advantages of using Nuclear fusion reactors to generate energy, what is a “tokamak” and how a tokamak works, Conclusion and Referred articles.

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14

Smith, R. C., and D. B. Oerther. "Microbial community development in a laboratory-scale nitrifying activated sludge system with input from a side-stream bioreactor treating digester supernatant." Water Science and Technology 54, no. 1 (2006): 209–16. http://dx.doi.org/10.2166/wst.2006.389.

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Three laboratory-scale activated sludge treatment trains were operated to investigate the effect on biodiversity in plug flow (PFR) main-stream sewage treatment from input of biomass from side-stream reactors treating anaerobic digester supernatant. One train had a completely mixed (CSTR) side-stream reactor, one a PFR side-stream reactor, and the third train was a control that did not receive input from a side-stream reactor. Restriction endonucleases were used to digest polymerase chain reaction-amplified ammonia monooxygenase subunit A (amoA) genes in monthly samples from each reactor. Rest

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15

Kaleta, Paweł, Krzysztof Król, Marek Opielak, Michał Jarmuł, Ryszard Nowak, and Sebastian Zupok. "Feedback system for reactor process analysis." Journal of Modern Science 57, no. 3 (2024): 450–66. http://dx.doi.org/10.13166/jms/191568.

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The article discusses an approach to analyzing processes in industrial reactors using advanced systems with feedback. The authors describe the system preparation and image reconstruction algorithms of ultrasonic tomographs (USTs) that have applications in industry. The research presented in this paper focuses on developing effective strategies for controlling and monitoring chemical reaction processes in reactors. Using advanced data processing techniques, the authors propose systems with feedback that enable accurate analysis and optimization of reactor operating conditions. A key aspect is u

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16

Nchikou, C. "One-dimensional six-flux model (SFM-1D) for the description, estimation, and optimization of the radiant field in annular and tubular photocatalytic reactors." Journal of Applied Research and Technology 23, no. 2 (2025): 178–91. https://doi.org/10.22201/icat.24486736e.2025.23.2.2555.

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The goal of this study was to solve the radiative transfer equation in one dimension utilizing the Six-Flux Model technique (SFM-1D) to characterize, estimate, and optimize the radiant field in annular photocatalytic reactors by performing an energy balance in a cylinder's element. The local volumetric rate of photon absorption (LVRPA), a parameter required for the description of the photocatalytic reaction kinetics, was defined. This parameter was defined for two types of reactors with a constant-intensity radiant source located vertically at the center of the first reactor (annular-reactor R

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17

Primozic, Mateja, Maja Habulin, Muzafera Paljevac, and Zeljko Knez. "Enzyme-catalyzed reactions in different types of high-pressure enzymatic reactors." Chemical Industry and Chemical Engineering Quarterly 12, no. 3 (2006): 159–63. http://dx.doi.org/10.2298/ciceq0603159p.

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The enzyme-catalyzed hydrolysis of carboxy-methyl cellulose (CMC) was performed in three different types of reactors; in a batch stirred-tank reactor (BSTR) operating at atmospheric pressure, in a high-pressure batch stirred-tank reactor (HP BSTR) and in a high-pressure continuous tubular-membrane reactor (HP CTMR). In the high-pressure reactors aqueous SC CO2 was used as the reaction medium. The aim of our research was optimization of the reaction parameters for reaction performance. All the reactions were catalyzed by cellulase from Humicola insolens. Glucose production in the high-pressure

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18

Yao, Qikai. "The challenges of nuclear fusion reactor." Theoretical and Natural Science 11, no. 1 (2023): 105–10. http://dx.doi.org/10.54254/2753-8818/11/20230387.

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Energy shortage is one of nonnegligible problems nowadays. Even since the twenty centuries, the achievement of fission reactor has proved that nuclear energy is a powerful source. However, fission reaction could cause radiation hazard if operation error happens. Nuclear fusion can provide more clean energy. This paper discusses nuclear fusion and two typical models of fusion reactor, inertial confinement fusion reactor and tokamak, and their properties. Fusion reactors use deuterium and tritium to fuse heavier nucleus and release energy. With -distribution, deuterium-tritium fusion reactivity

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19

Soponpongpipat, Nitipong, Suwat Nanetoe, and Paisan Comsawang. "Thermal Degradation of Cassava Rhizome in Thermosyphon-Fixed Bed Torrefaction Reactor." Processes 8, no. 3 (2020): 267. http://dx.doi.org/10.3390/pr8030267.

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A thermosyphon-fixed bed reactor was designed and constructed to investigate the temperature distribution of the cassava rhizome and its decomposition behavior. To study the properties of torrefied char obtained from this reactor, cassava rhizome was torrefied in five different configurations, including the thermosyphon-fixed bed reactor, a laboratory reactor in compact bulk arrangement with N2 as the purge gas and without any purge gas, and another one in a hollow bulk arrangement with and without purge gas. It was found that the use of thermosyphons with a fixed bed reactor improved the unif

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20

Song, Lin, Xin Zhang, Xiao Long Zeng, and Ming Yu Li. "Role of the Cathode in a Novel Photo-Electro-Chemical Catalytic Reactor." Advanced Materials Research 455-456 (January 2012): 985–90. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.985.

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A novel photo-electro-chemical catalytic reactor with single/double-tank was designed. TiO2/Ti thin film electrode was used as photo-anodes, graphite as cathode and a saturated calomel electrode (SCE) as the reference electrode in the reactor. The efficiency of photo-electro-chemical catalysis was enhanced because the target pollutant was degraded not only titanium dioxide electrode in anodic tank, but also hydrogen peroxide through reducing dissolved oxygen with graphite electrode in catholyte. Malachite green (MG) and crystal violet (CV) were degradated effectively in these two reactors. The

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21

Borovinskaya, Ekaterina, Valentin Khaydarov, Nicole Strehle, Alexander Musaev, and Wladimir Reschetilowski. "Experimental Studies of Ethyl Acetate Saponification Using Different Reactor Systems: The Effect of Volume Flow Rate on Reactor Performance and Pressure Drop." Applied Sciences 9, no. 3 (2019): 532. http://dx.doi.org/10.3390/app9030532.

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Microreactors intensify chemical processes due to improved flow regimes, mass and heat transfer. In the present study, the effect of the volume flow rate on reactor performance in different reactors (the T-shaped reactor, the interdigital microreactor and the chicane microreactor) was investigated. For this purpose, the saponification reaction in these reactor systems was considered. Experimental results were verified using the obtained kinetic model. The reactor system with a T-shaped reactor shows good performance only at high flow rates, while the experimental setups with the interdigital a

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22

Muhammad Asyraaf Asri, Nurul Fitriah Nasir, Ishkrizat Taib, and Djamal Hissein Didane. "Prediction of Fluid Pattern of Biodiesel Production in a Membrane Reactor." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 111, no. 1 (2023): 156–65. http://dx.doi.org/10.37934/arfmts.111.1.156165.

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Utilization of membrane reactors for biodiesel production has been an alternative to conventional batch reactors. The membrane in the reactor acts as a separation layer, preventing the formation of by-products and allowing the desired biodiesel product to pass through. This can improve yields and reduce waste, making the process more environmentally friendly and economically viable. This study aimed to analyze the fluid flow and velocity profile inside the membrane reactor and determine the volume fraction of biodiesel. The modeling and simulation of the fluid flow of biodiesel in a membrane r

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23

Wei, Gui, and Hong Chang. "Design of Photocatalytic Reactor with Photocatalyst Film Loaded on Substrate." Advanced Materials Research 823 (October 2013): 214–17. http://dx.doi.org/10.4028/www.scientific.net/amr.823.214.

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After analytical studies of the characteristics of various slurry and supported photocatalytic reactors, a photocatalytic reactor with photocatalyst film loaded on substrate is designed in this paper. This reactor is characterized by the easy attachment and convenient installation & replacement of photocatalyst, higher light utilization, and complete photocatalytic reaction.

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24

Alinejad, Milad Mohammad, Kamran Ghasemzadeh, Adolfo Iulianelli, Simona Liguori, and Milad Ghahremani. "CFD Development of a Silica Membrane Reactor during HI Decomposition Reaction Coupling with CO2 Methanation at Sulfur–Iodine Cycle." Nanomaterials 12, no. 5 (2022): 824. http://dx.doi.org/10.3390/nano12050824.

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In this work, a novel structure of a hydrogen-membrane reactor coupling HI decomposition and CO2 methanation was proposed, and it was based on the adoption of silica membranes instead of metallic, according to their ever more consistent utilization as nanomaterial for hydrogen separation/purification. A 2D model was built up and the effects of feed flow rate, sweep gas flow rate and reaction pressure were examined by CFD simulation. This work well proves the feasibility and advantage of the membrane reactor that integrates HI decomposition and CO2 methanation reactions. Indeed, two membrane re

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25

Chen, Junjie. "Hydrogen production in microchannel methanol steam reforming reactors." BASRA JOURNAL OF SCIENCE 40, no. 1 (2022): 83–106. http://dx.doi.org/10.29072/basjs.20220105.

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Many attempts have been made to improve heat transfer for thermally integrated microchannel reforming reactors. However, the mechanisms for the effects of design factors on heat transfer characteristics are still not fully understood. This study relates to a thermochemical process for producing hydrogen by methanol steam reforming in a microchannel reactor. Computational fluid dynamics simulations are conducted to understand the consumption, generation, and exchange of thermal energy between endothermic and exothermic processes in the reactor. The effects of wall heat conduction properties and

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26

BUISMAN, C., B. WIT, and G. LETTINGA. "Biotechnological sulphide removal in three polyurethane carrier reactors: stirred reactor, biorotor reactor and upflow reactor." Water Research 24, no. 2 (1990): 245–51. http://dx.doi.org/10.1016/0043-1354(90)90110-r.

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27

Sargsyan, Garnik, Anatolii Silveistr, Mykhailo Lysyi, Mykola Mokliuk, and Hrachya Sargsyan. "The appearance of standing wave structures in the reaction medium during the diffusion development of the chain reaction process." Scientific Herald of Uzhhorod University Series Physics, no. 54 (November 20, 2023): 36–46. http://dx.doi.org/10.54919/physics/54.2023.36.

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Relevance. Understanding the dynamic behavior of radicals in reactors undergoing gas-phase oxidation of organic substances is crucial for optimizing reactor design and safety across industries. Purpose. This study aims to elucidate the emergence of standing wave structures influenced by feedback mechanisms in reactors with cylindrical and spherical symmetry, using mathematical principles governing the propagation of oscillations and shock waves in diffusion-driven chain reactions. Methodology. Materials and methods for the research included a computer simulation using MATHCAD 2001i, and compar

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28

Chen, Junjie. "Methanol steam reforming for hydrogen production in microchannel reactors." Chemical Engineering Journal Storage 1, no. 4 (2022): 1. http://dx.doi.org/10.29103/cejs.v1i4.6176.

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Many attempts have been made to improve heat transfer for thermally integrated microchannel reforming reactors. However, the mechanisms for the effects of design factors on heat transfer characteristics are still not fully understood. This study relates to a thermochemical process for producing hydrogen by the catalytic endothermic reaction of methanol with steam in a thermally integrated microchannel reforming reactor. Computational fluid dynamics simulations are conducted to better understand the consumption, generation, and exchange of thermal energy between endothermic and exothermic proce

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Chen, Junjie. "Methanol steam reforming for hydrogen production in microchannel reactors." Chemical Engineering Journal Storage 1, no. 4 (2022): 1. http://dx.doi.org/10.29103/cejs.v1i4.6176.

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Many attempts have been made to improve heat transfer for thermally integrated microchannel reforming reactors. However, the mechanisms for the effects of design factors on heat transfer characteristics are still not fully understood. This study relates to a thermochemical process for producing hydrogen by the catalytic endothermic reaction of methanol with steam in a thermally integrated microchannel reforming reactor. Computational fluid dynamics simulations are conducted to better understand the consumption, generation, and exchange of thermal energy between endothermic and exothermic proce

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Junjie, Chen. "Thermally integrated microchannel methanol steam reforming reactors for hydrogen production." Algerian Journal of Chemical Engineering 1, no. 1 (2022): 01–10. https://doi.org/10.5281/zenodo.6126563.

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Thermally integrated microchannel reforming reactors have attracted considerable interest for a wide variety of applications. However, the mechanisms for the effects of design factors on heat transfer characteristics are still not fully understood. The present study relates to a thermochemical process for producing hydrogen by the catalytic endothermic reaction of methanol with steam in a thermally integrated microchannel reforming reactor. Numerical simulations are conducted using computational fluid dynamics to understand the consumption, generation, and exchange of thermal energy between en

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Li, Guochao, Jie Chen, Tao Yang, Jianqi Sun, and Shenglu Yu. "Denitrification with corncob as carbon source and biofilm carriers." Water Science and Technology 65, no. 7 (2012): 1238–43. http://dx.doi.org/10.2166/wst.2012.960.

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In this research the agricultural by-product corncob was investigated as a carbon source as well as a biofilm carrier to remove organic matter, expressed as chemical oxygen demand (COD) and nitrate nitrogen (nitrate-N), from wastewater in a batch laboratory reactor. The performance of a reactor with corncob as the carbon source and the biofilm carrier was compared with a control batch reactor with suspended plastic carriers and glucose as the sole carbon source. With 60 vol% of corncob carriers inside the reactor, a soluble COD/N ratio of 4.2 g COD g N−1 was enough for total denitrification, n

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Shulaeva, Ekaterina A. "Application of Electrodynamic Catalytic Reactors for Intensification of Heat and Mass Exchange Processes of Heterophase Catalysis." WSEAS TRANSACTIONS ON POWER SYSTEMS 17 (March 2, 2022): 37–44. http://dx.doi.org/10.37394/232016.2022.17.4.

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This article discusses a model of an electrodynamic reactor. It is fundamentally different in the way of supplying energy to the reaction zone from the reactors currently in operation in industry. This significantly reduces energy consumption, simplifies process control and increases the efficiency of the reactor. The environmental advantage of the developed reactor is also of great importance. There are no emissions of gases into the atmosphere, which are formed in large quantities during fuel combustion in superheating furnaces, the consumption of water is reduced, which is used only in a cl

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Wosu, C. O., O. Anisa, and F. O. Nelson. "Comparative design of flow reactors for the production of 100,000 tons per year of cumene from the catalytic alkylation of propylene and benzene." LAUTECH Journal of Engineering and Technology 19, no. 1 (2025): 142–53. https://doi.org/10.36108/laujet/5202.91.0131.

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This research is driven by the need to ensure effective, economic and sustainable processes for cumene production from the catalytic alkylation of propylene and benzene in flow reactors. The flow reactors are the continuous stirred tank reactor (CSTR) and the plug flow reactor (PFR) where the alkylation reaction occurred. The reactors were designed by exploring the conservation principle of mass and energy over the reactors. The performance model of the reactors were simulated using MATLAB at the same initial feed and operating temperature of 481.1k and 483k with fractional conversion changes

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Mularski, Jakub, and Norbert Modliński. "Impact of Chemistry–Turbulence Interaction Modeling Approach on the CFD Simulations of Entrained Flow Coal Gasification." Energies 13, no. 23 (2020): 6467. http://dx.doi.org/10.3390/en13236467.

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This paper examines the impact of different chemistry–turbulence interaction approaches on the accuracy of simulations of coal gasification in entrained flow reactors. Infinitely fast chemistry is compared with the eddy dissipation concept considering the influence of turbulence on chemical reactions. Additionally, ideal plug flow reactor study and perfectly stirred reactor study are carried out to estimate the accuracy of chosen simplified chemical kinetic schemes in comparison with two detailed mechanisms. The most accurate global approach and the detailed one are further implemented in the

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Wang, Boyan, Zhiyuan Wang, Yan Ma, and Yijing Liang. "Heat Transfer Enhancement of Indirect Heat Transfer Reactors for Ca(OH)2/CaO Thermochemical Energy Storage System." Processes 9, no. 7 (2021): 1136. http://dx.doi.org/10.3390/pr9071136.

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The efficiency of a thermochemical energy storage system can be improved by optimizing the structure of the thermochemical energy storage reactor. We proposed two modified structures for indirect heat transfer thermochemical energy storage reactors for a Ca(OH)2/CaO system to improve their heat transfer performance. Our results showed that improving convective heat transfer offered varying effects on heat transfer performance in different reaction processes. For a half-plate pin fin sinks (HPPFHS) reactor and a plate pin fin sinks (PPFHS) reactor, enhancing the convective heat transfer process

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Chaedir, Benitta A., Jundika C. Kurnia, Lianjun Chen, Lishuai Jiang, and Agus P. Sasmito. "Numerical Investigation of Ventilation Air Methane Catalytic Combustion in Circular Straight and Helical Coil Channels with Twisted Tape Insert in Catalytic-Monolith Reactors." Catalysts 10, no. 7 (2020): 797. http://dx.doi.org/10.3390/catal10070797.

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In a catalytic combustion of ventilation air methane, one of the key factors determining the reactor performance is the geometry of the reactor. It should be designed to provide maximum energy conversion at minimum catalyst usage and operating cost. This numerical study is conducted to investigate the catalytic combustion of ventilation air methane from a gassy underground mine in a circular straight and helical reactor channel with twisted tape insert. A three-dimensional computational fluid dynamics model which considers conservation of mass, momentum, energy, and species together with chemi

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Ogijoh Jibrin Yakubu, Olalekan Michael Adeloye, and Princewill Woyinbrakemi Igbagara. "Simulation of packed bed reactors for naphtha reforming unit." International Journal of Engineering Research Updates 3, no. 2 (2022): 053–63. http://dx.doi.org/10.53430/ijeru.2022.3.2.0060.

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The study focused on the performance evaluation of catalytic naphtha reforming unit via a packed bed reactors arranged in series. Three series arranged packed bed naphtha reforming reactors were developed and simulated using Aspen hysys software and steady state performance models of the packed bed naphtha reforming reactor were developed through the application of the principle of conservation of mass and energy to predict both the yields of theses reactors, their dimensions in terms of length, diameter, height, volume and temperature effects or progressions along the reactors’ length respect

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Lindeque, Rowan, and John Woodley. "Reactor Selection for Effective Continuous Biocatalytic Production of Pharmaceuticals." Catalysts 9, no. 3 (2019): 262. http://dx.doi.org/10.3390/catal9030262.

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Enzyme catalyzed reactions are rapidly becoming an invaluable tool for the synthesis of many active pharmaceutical ingredients. These reactions are commonly performed in batch, but continuous biocatalysis is gaining interest in industry because it would allow seamless integration of chemical and enzymatic reaction steps. However, because this is an emerging field, little attention has been paid towards the suitability of different reactor types for continuous biocatalytic reactions. Two types of continuous flow reactor are possible: continuous stirred tank and continuous plug-flow. These react

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Mustafa Kamal Pasha, Mustafa Kamal Pasha, Iftikhar Ahmad Iftikhar Ahmad, Jawad Mustafa Jawad Mustafa, and Manabu Kano Manabu Kano. "Modeling of a Nickel-based Fluidized Bed Membrane Reactor for Steam Methane Reforming Process." Journal of the chemical society of pakistan 41, no. 2 (2019): 219. http://dx.doi.org/10.52568/000729/jcsp/41.02.2019.

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Hydrogen being a green fuel is rapidly gaining importance in the energy sector. Steam methane reforming is one of the most industrially important chemical reaction and a key step in the production of high purity hydrogen. Due to inherent deficiencies of conventional reforming reactors, a new concept based on fluidized bed membrane reactor is getting the focus of researchers. In this work, a nickel-based fluidized bed membrane reactor model is developed in the Aspen PLUSand#174; process simulator. A user-defined membrane module is embedded in the Aspen PLUSand#174; through its interface with Mi

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Liu, Daoyin, Zhonglin Zhang, Yaming Zhuang, and Xiaoping Chen. "Comparison of CFD Simulation and Simplified Modeling of a Fluidized Bed CO2 Capture Reactor." International Journal of Chemical Reactor Engineering 14, no. 1 (2016): 133–41. http://dx.doi.org/10.1515/ijcre-2015-0058.

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AbstractCO2 capture using solid sorbents in fluidized bed reactors is a promising technology. The multiphase CFD model is increasingly developed to study the reactors, but it is difficult to model all the realistic details and it requires significant computational time. In this study, both the multiphase CFD model (i.e., CFD-DEM model coupled with reaction) and the simplified reactor models (i.e., plug flow model and bubbling two-phase model) are developed for modeling a fluidized bed CO2 capture reactor. The comparisons are made at different gas velocities from fixed bed to fluidized bed. The

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Caravella, Alessio. "Extended Definition of Conversion and Reaction Extent for a Systematic Development of the Design Equations for Reactor Networks." Processes 12, no. 1 (2024): 107. http://dx.doi.org/10.3390/pr12010107.

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The aim of this work is to present in a systematic way a novel general methodology to develop the design equations (heat and mass balances) for networks of ideal reactors, that is, Plug-Flow Reactors (PFRs) and Continuous Stirred Tank Reactors (CSTRs). In particular, after introducing the general definition of conversion to be used for reactor networks, several case studies of interest in chemical engineering are presented as topic-examples of application: (i) adiabatic-stage reactors with recycle, (ii) adiabatic-stage reactors with split, (iii) adiabatic-stage reactors intercooled by reactant

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Durán Peralta, Héctor Armando, and Luis Fernando Córdoba C. "Stability analysis of a PFTR reactor for a first order kinetic reaction using the Lyapunov functionals." Ingeniería e Investigación 27, no. 1 (2007): 115–22. http://dx.doi.org/10.15446/ing.investig.v27n1.14790.

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The stability of reactors having encompassing concentration and temperature parameters, such as continuous flow stirred tank reactors (CSTR), has been widely explored in the literature; however, there are few papers about the stability of tubular reactor having distributed spatial concentration and temperature parameters such as the plow flow tubular reactor (PFTR). This paper analyses the stability of isothermal and non-isothermal PFTR reactors using the Lyapunov functional method. The first order kinetic reaction was selected because one of this paper’s objectives was to apply Lyapunov funct

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Pereira, J. O., E. F. A. Mac Conell, S. Q. Silva, and C. A. L. Chernicharo. "Granular biomass selection in a double-stage biogas collection UASB reactor: effects on SMA, abundance and diversity of the methanogenic population." Water Science and Technology 66, no. 12 (2012): 2570–77. http://dx.doi.org/10.2166/wst.2012.483.

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The present work aimed at investigating biomass selection in a pilot-scale double-stage biogas collection (DSBC) upflow anaerobic sludge bed (USAB) reactor treating domestic wastewater. Specific methanogenic activity (SMA) measurements and FISH countings were applied to sludge samples collected during 102 days of operation of the DSBC–UASB and of a control reactor. Results showed that both reactors presented similar SMA values in early stages of operation however the UASB–DSBC reactor showed much higher SMA after day 45, when the biomass was in granular stage. In terms of archaeal abundance, n

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Vlaev, Serafim D., and Jindřich Zahradník. "Energy effectiveness and working characteristics of different tower reactors for aerated slurry systems." Collection of Czechoslovak Chemical Communications 52, no. 11 (1987): 2624–39. http://dx.doi.org/10.1135/cccc19872624.

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Decisive hydrodynamic and mass transfer characteristics of different types of tower reactors (rotating disc reactor, single and multistage sieve-tray bubble columns, tower reactor with ejector gas distributor) as well as the energy effectiveness of their performance were compared with the purpose to establish a quantitative basis for the qualified choice of the proper reactor type according to demands of specific reaction processes. Selected design parameters included gas and solid phase holdup, kLaL, liquid phase residence time distribution, and axial distribution of the solid phase, the expe

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Silva, Renan Rodrigues de Oliveira, and Mauri Sergio Alves Palma. "Flow synthesis of n-substituted 5-benzylidinethiazolidine-2,4-dione." STUDIES IN ENGINEERING AND EXACT SCIENCES 3, no. 2 (2022): 385–402. http://dx.doi.org/10.54021/sesv3n2-006.

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Process intensification based on micro reactor technology allows safe manner and a new pathway to run organic synthesis due to its intrinsic characteristics, and can reduce time-to-market of new drugs. The main objective of this work was to study the batch and flow reaction of five n-substituted 5-benzylidenethiazolidine-2,4-dione heterocyclic intermediates present in the synthesis of glitazone class drugs, in capillary micro reactor. Batch process was conducted with ethanol as solvent at the boiling point and pyrrolidine as promoting base of the reaction. Higher yields were obtained in shorte

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Li, Penglei, Lingen Chen, Shaojun Xia, and Lei Zhang. "Entropy Generation Rate Minimization for Methanol Synthesis via a CO2 Hydrogenation Reactor." Entropy 21, no. 2 (2019): 174. http://dx.doi.org/10.3390/e21020174.

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The methanol synthesis via CO2 hydrogenation (MSCH) reaction is a useful CO2 utilization strategy, and this synthesis path has also been widely applied commercially for many years. In this work the performance of a MSCH reactor with the minimum entropy generation rate (EGR) as the objective function is optimized by using finite time thermodynamic and optimal control theory. The exterior wall temperature (EWR) is taken as the control variable, and the fixed methanol yield and conservation equations are taken as the constraints in the optimization problem. Compared with the reference reactor wit

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He, Li, Han, Cabassud, and Dahhou. "Development of a Numerical Model for a Compact Intensified Heat-Exchanger/Reactor." Processes 7, no. 7 (2019): 454. http://dx.doi.org/10.3390/pr7070454.

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A heat-exchanger/reactor (HEX reactor) is a kind of plug-flow chemical reactor which combines high heat transfer ability and chemical performance. It is a compact reactor designed under the popular trend of process intensification in chemical engineering. Previous studies have investigated its characteristics experimentally. This paper aimed to develop a general numerical model of the HEX reactor for further control and diagnostic use. To achieve this, physical structure and hydrodynamic and thermal performance were studied. A typical exothermic reaction, which was used in experiments, is mode

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Chen, Qiang, Mingming Mao, Min Gao, Yongqi Liu, Junrui Shi, and Jia Li. "Design and Performance Investigation of a Compact Catalytic Reactor Integrated with Heat Recuperator." Energies 15, no. 2 (2022): 447. http://dx.doi.org/10.3390/en15020447.

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The catalytic combustion has the advantage of lower auto-ignition temperature and helps to expand the combustible limit of lean premixed gas. However, the intake needs to be preheated to certain temperature commonly through an independent heat exchanger. Similar to the principles of non-catalytic RTO combustion, this paper presents a similar approach whereby the combustion chamber is replaced by a catalytic combustion bed. A new catalytic reactor integrated with a heat recuperator is designed to enhance the heat recirculation effect. Using a two-dimensional computational fluid dynamics model,

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Macků, Lubomír. "Determination of exothermic batch reactor specific model parameters." MATEC Web of Conferences 292 (2019): 01063. http://dx.doi.org/10.1051/matecconf/201929201063.

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An alternative method of determining exothermic reactor model parameters which include first order reaction rate constant is described in this paper. The method is based on known in reactor temperature development and is suitable for processes with changing quality of input substances. This method allows us to evaluate the reaction substances composition change and is also capable of the reaction rate constant (parameters of the Arrhenius equation) determination. Method can be used in exothermic batch or semi- batch reactors running processes based on the first order reaction. An example of su

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Manassero, Agustina, Orlando Mario Alfano, and María Lucila Satuf. "Degradation of Emerging Pollutants by Photocatalysis: Radiation Modeling and Kinetics in Packed-Bed Reactors." Water 14, no. 22 (2022): 3608. http://dx.doi.org/10.3390/w14223608.

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Radiation modeling and kinetics in two different packed-bed reactors filled with TiO2-coated glass rings are presented. The first reactor was cylindrical, irradiated from one end by a 150 W mercury lamp. It was employed to obtain the values of the intrinsic kinetic parameters of the degradation of the emerging contaminant clofibric acid (CA). The expression to represent the kinetics of the pollutant was derived from a proposed reaction scheme, and it includes explicitly the effect of photon absorption rate on the reaction rate. The second reactor was annular, irradiated internally and external

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