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Journal articles on the topic 'Heterogeneous production processes'

Author: Grafiati

Published: 25 January 2025

Last updated: 31 July 2025

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1

Sal’nikov, L. I., I. I. Brazovskii, V. V. Saskovets, I. A. Sal’nikova, T. I. Evseenko, and G. V. Makarevich. "Heterogeneous thermoradiation processes for hydrogen production from steam." High Energy Chemistry 44, no. 3 (2010): 173–77. http://dx.doi.org/10.1134/s0018143910030021.

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Khan, Haris Mahmood, Tanveer Iqbal, M. A. Mujtaba, Manzoore Elahi M. Soudagar, Ibham Veza, and I. M. Rizwanul Fattah. "Microwave Assisted Biodiesel Production Using Heterogeneous Catalysts." Energies 14, no. 23 (2021): 8135. http://dx.doi.org/10.3390/en14238135.

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As a promising renewable fuel, biodiesel has gained worldwide attention to replace fossil-derived mineral diesel due to the threats concerning the depletion of fossil reserves and ecological constraints. Biodiesel production via transesterification involves using homogeneous, heterogeneous and enzymatic catalysts to speed up the reaction. The usage of heterogeneous catalysts over homogeneous catalysts are considered more advantageous and cost-effective. Therefore, several heterogeneous catalysts have been developed from variable sources to make the overall production process economical. After

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Miceli, Milagros, Tianling Yang, Adriana Alvarado Garcia, et al. "Documenting Data Production Processes." Proceedings of the ACM on Human-Computer Interaction 6, CSCW2 (2022): 1–34. http://dx.doi.org/10.1145/3555623.

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The opacity of machine learning data is a significant threat to ethical data work and intelligible systems. Previous research has addressed this issue by proposing standardized checklists to document datasets. This paper expands that field of inquiry by proposing a shift of perspective: from documenting datasets towards documenting data production. We draw on participatory design and collaborate with data workers at two companies located in Bulgaria and Argentina, where the collection and annotation of data for machine learning are outsourced. Our investigation comprises 2.5 years of research,

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Lubkov, M., and O. Zaharchuk. "MODELING OF DISPLACEMENT PROCESSES IN HETEROGENEOUS ANISOTROPIC GAS RESERVOIRS." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 2 (93) (2021): 94–99. http://dx.doi.org/10.17721/1728-2713.93.11.

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Nowadays there are important problems of increasing efficiency of development and exploitation of gas deposits. There are problems associated with the growth of gas production in heterogeneous anisotropic reservoirs, increasing gas recovery, achieving economic efficiency and so on. In this situation, there are popular methods of computer modeling of gas productive reservoirs, because they allow getting information of the structure and characteristics of the gas reservoir, the distribution parameters of permeability and other important factors in it. They also allow evaluating and calculating u

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Bendali, Fatiha, Eloise Mole Kamga, Jean Mailfert, Alain Quilliot, and Hélène Toussaint. "Pipe-lining dynamic programming processes to synchronize both the production and the consumption of energy." RAIRO - Operations Research 55, no. 4 (2021): 2359–83. http://dx.doi.org/10.1051/ro/2021094.

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Synchronizing heterogeneous processes remains a difficult issue in Scheduling area. Related ILP models are in trouble, because of large gaps induced by rational relaxation. We choose here to deal with it while emulating the interactions which take place between the various players of such heterogeneous processes, and propose a pipe-line decomposition of a dynamic programming process designed in order to schedule energy production and energy consumption

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Xue, L. K., T. Wang, J. Gao, et al. "Ground-level ozone in four Chinese cities: precursors, regional transport and heterogeneous processes." Atmospheric Chemistry and Physics Discussions 14, no. 14 (2014): 20767–803. http://dx.doi.org/10.5194/acpd-14-20767-2014.

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Abstract. We analyzed measurements of ozone (O3) and its precursors made at rural/suburban sites downwind of four large Chinese cities – Beijing, Shanghai, Guangzhou and Lanzhou, to elucidate their pollution characteristics, regional transport, in situ production, and impacts of heterogeneous processes. The same measurement techniques and observation-based model were used to minimize uncertainties in comparison of the results due to difference in methodologies. All four cities suffered from serious O3 pollution but showed different precursor distributions. The model-calculated in situ O3 produ

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Nurul Aina Nasriqah Binti Ma’arof, Noor Hindryawati, Siti Norhafiza Mohd Khazaai, Prakash Bhuyar, Mohd Hasbi Ab. Rahim, and Gaanty Pragas Maniam. "Biodiesel (Methyl Esters)." Maejo International Journal of Energy and Environmental Communication 3, no. 1 (2021): 30–43. http://dx.doi.org/10.54279/mijeec.v3i1.245153.

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Biodiesel, an environmentally friendly biomass-based fuel, is gaining popularity globally as a cost-effective way to meet rising fuel demand. However, the high cost of raw materials and catalysts continues to drive up biodiesel production. An alternative feedstock with a heterogeneously catalyzed reaction could be the most cost-effective way to stabilize industrial biodiesel growth. Understanding these issues led to the idea of using waste palm oil as a feedstock for biodiesel production. While using waste materials as feedstock for biodiesel is an elegant solution, converting high free fatty

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Xue, L. K., T. Wang, J. Gao, et al. "Ground-level ozone in four Chinese cities: precursors, regional transport and heterogeneous processes." Atmospheric Chemistry and Physics 14, no. 23 (2014): 13175–88. http://dx.doi.org/10.5194/acp-14-13175-2014.

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Abstract. We analyzed the measurements of ozone (O3) and its precursors made at rural/suburban sites downwind of four large Chinese cities – Beijing, Shanghai, Guangzhou and Lanzhou, to elucidate their pollution characteristics, regional transport, in situ production, and impacts of heterogeneous processes. The same measurement techniques and observation-based model were used to minimize uncertainties in comparison of the results due to difference in methodologies. All four cities suffered from serious O3 pollution but showed different precursor distributions. The model-calculated in situ O3 p

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9

Ruhul, A. M., M. A. Kalam, H. H. Masjuki, I. M. Rizwanul Fattah, S. S. Reham, and M. M. Rashed. "State of the art of biodiesel production processes: a review of the heterogeneous catalyst." RSC Advances 5, no. 122 (2015): 101023–44. http://dx.doi.org/10.1039/c5ra09862a.

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This study described the latest technology for fixed batch and continues biodiesel production for both laboratory and industrial scale as well as the role of the heterogeneous catalyst in biodiesel production process.

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Khana, Osama, M. Emran V., Ashok Kumar Yadava, and Saurabh Kumar Guptab. "Study on Some Advanced Techniques to Produce Biodiesel from Non-edible Oils." International Journal of Advance Research and Innovation 5, no. 1 (2017): 135–43. http://dx.doi.org/10.51976/ijari.511722.

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This paper reviews various technologies that have been used for biodiesel production till date, with a view to comparing commercial suitability of these methods on the basis of available feed stocks and associated challenges. Homogenously catalyzed processes are the conventional technologies. However, their large-scale applicability is compromised due to their characteristic challenges. Batch processes and continuous processes are used for industrial purposes and heterogeneous catalysis may be sustainable for the continuous processes. Heterogeneous catalysts from renewable sources may be both

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Ramos, Dias, Puna, Gomes, and Bordado. "Biodiesel Production Processes and Sustainable Raw Materials." Energies 12, no. 23 (2019): 4408. http://dx.doi.org/10.3390/en12234408.

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Energy security and environmental concerns, related to the increasing carbon emissions, have prompted in the last years the search for renewable and sustainable fuels. Biodiesel, a mixture of fatty acids alkyl esters shows properties, which make it a feasible substitute for fossil diesel. Biodiesel can be produced using different processes and different raw materials. The most common, first generation, biodiesel is produced by methanolysis of vegetable oils using basic or acid homogeneous catalysts. The use of vegetable oils for biodiesel production raises serious questions about biodiesel sus

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Cerón Ferrusca, Montserrat, Rubi Romero, Sandra Luz Martínez, Armando Ramírez-Serrano, and Reyna Natividad. "Biodiesel Production from Waste Cooking Oil: A Perspective on Catalytic Processes." Processes 11, no. 7 (2023): 1952. http://dx.doi.org/10.3390/pr11071952.

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Presently, the use of fossil fuels is not ecologically sustainable, which results in the need for new alternative energies such as biodiesel. This work presents a review of the classification of the lipidic feedstocks and the catalysts for biodiesel production. It also presents the pros and cons of the different processes and feedstocks through which biodiesel is obtained. In this context, cooking oil (WCO) has emerged as an alternative with a high potential for making the process sustainable. A detected limitation to achieving this is the high content of free fatty acids (FFA) and existing pr

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Trojan, Jozef, Peter Trebuňa, and Marek Mizerák. "Application of Digital Engineering Methods in Order to Improve Processes in Heterogeneous Companies." Applied Sciences 13, no. 13 (2023): 7681. http://dx.doi.org/10.3390/app13137681.

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In the presented article, the initial phase is focused mainly on familiarization with the production focus of individual enterprises and their financial security, which provides a basis for the proposal of possible solutions to shortcomings. A more detailed study of production through simulation studies using Process Simulate software provides a more comprehensive view of production in the assessed enterprises, where the current course of production at workplaces is evaluated in detail, and suggestions are then offered to improve the revealed shortcomings. In the end, there is an assessment of

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Slavinskaya, N. A., U. Riedel, V. E. Messerle, and A. B. Ustimenko. "Chemical Kinetic Modeling in Coal Gasification Processes: an Overview." Eurasian Chemico-Technological Journal 15, no. 1 (2012): 1. http://dx.doi.org/10.18321/ectj134.

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<p>Coal is the fuel most able to cover world deficiencies in oil and natural gas. This motivates the development of new and more effective technologies for coal conversion into other fuels. Such technologies are focused on coal gasification with production of syngas or gaseous hydrocarbon fuels, as well as on direct coal liquefaction with production of liquid fuels. The benefits of plasma application in these technologies is based on the high selectivity of the plasma chemical processes, the high efficiency of conversion of different types of coal including those of low quality, relative

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15

Lee, Adam F., James A. Bennett, Jinesh C. Manayil, and Karen Wilson. "Heterogeneous catalysis for sustainable biodiesel productionviaesterification and transesterification." Chem. Soc. Rev. 43, no. 22 (2014): 7887–916. http://dx.doi.org/10.1039/c4cs00189c.

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Low temperature catalytic conversion of triglycerides and fatty acids sourced from renewable feedstocks represents a key enabling technology for the sustainable production of biodiesel through energy efficient, intensified processes.

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Saidakbarovna, Salikhanova Dilnoza. "THE CURRENT STATE OF TECHNOLOGIES FOR THE PRODUCTION AND ACTIVATED CLAY ADSORBENTS." International Journal of Advance Scientific Research 02, no. 04 (2022): 25–28. http://dx.doi.org/10.37547/ijasr-02-04-05.

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It is known that adsorption events, as a rule, occur in a liquid medium containing different categories of substances, are not inert in terms of composition and properties of the medium, and are directly involved in these processes. Here, the main component is the adsorbent, which is selected depending on the nature of the liquid to be cleaned, the polarity of the substances to be removed, their concentration, and so on. In addition, such processes in heterogeneous systems are mainly regulated by the properties of the adsorbents used and the technological parameters of their operation.

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Tóth, András József, and Szilvia Schmidt. "Method for Efficient Regeneration of Solvent Mixture: Extractive Heterogeneous-Azeotropic Distillation." Műszaki Tudományos Közlemények 15, no. 1 (2021): 103–7. http://dx.doi.org/10.33894/mtk-2021.15.20.

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Abstract The fine chemical and pharmaceutical industries use large amounts of various organic solvents in their manufacturing processes. By reusing them, production costs can be significantly reduced. If we can regenerate waste solvent mixtures, we have the opportunity to reuse them in the production process or in other production processes. Our study illustrates an efficient regeneration process using the example of a four-component solvent mixture. Calculations were performed in a professional process simulator to demonstrate that the highly non-ideal Water-Ethyl Alcohol-Methyl Ethyl Ketone-

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18

Tsai, Chi-Hung, and Wen-Tien Tsai. "Sustainable Processes Reusing Potassium-Rich Biomass Ash as a Green Catalyst for Biodiesel Production: A Mini-Review." Processes 12, no. 12 (2024): 2736. https://doi.org/10.3390/pr12122736.

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To mitigate the emissions of greenhouse gases (GHGs) from fossil fuels, the use of biodiesel and its sustainable production have been receiving more attention over the past decade, especially for the reuse of waste cooking oils and non-edible oils as starting feedstocks. For the biodiesel production process, the suitability of a green catalyst is a core function in the transesterification reaction. Heterogeneous (solid-state) catalysts are generally superior to homogeneous (liquid-state) catalysts due to several significant advantages such as no saponification products formed, recyclability, a

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Ichihashi, Hiroshi, та Hiroshi Sato. "The development of new heterogeneous catalytic processes for the production of ε-caprolactam". Applied Catalysis A: General 221, № 1-2 (2001): 359–66. http://dx.doi.org/10.1016/s0926-860x(01)00887-0.

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Sakai, Tsutomu, Ayato Kawashima, and Tetsuya Koshikawa. "Economic assessment of batch biodiesel production processes using homogeneous and heterogeneous alkali catalysts." Bioresource Technology 100, no. 13 (2009): 3268–76. http://dx.doi.org/10.1016/j.biortech.2009.02.010.

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21

Pham, Anh Tuan, Hyuna Kwon, Alexandra Zagalskaya, Marcos Calegari, and Tadashi Ogitsu. "Multiscale Modeling of Heterogeneous Interfaces for Hydrogen Production." ECS Meeting Abstracts MA2024-02, no. 42 (2024): 2825. https://doi.org/10.1149/ma2024-02422825mtgabs.

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Improving performance of hydrogen production devices requires a detailed understanding of physicochemical processes at solid-gas and solid-liquid interfaces. However, probing behavior of these interfaces under working conditions remain a significant challenge for both simulations and experimental probes. In this talk, I will provide an overview of our strategy for simulating heterogeneous interfaces within the HydroGEN Advanced Water Splitting Materials Consortium, ranging from first-principles calculations of chemical reactivity to machine learning approaches for accelerating theory-experimen

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22

Ejikeme, P. M., I. D. Anyaogu, C. L. Ejikeme, et al. "Catalysis in Biodiesel Production by Transesterification Processes-An Insight." E-Journal of Chemistry 7, no. 4 (2010): 1120–32. http://dx.doi.org/10.1155/2010/689051.

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Biodiesel is the mono-alkyl esters of long chain fatty acids derived from renewable lipid feedstock, such as vegetable oils and animal fats, for use in compression ignition (diesel) engines. The conversion of component triglycerides in oils to simple alkyl esters with short chain alcohols like methanol and ethanol amongst others is achieved mainly by transesterification. The transesterification reaction, a reversible process proceeds appreciably by the addition of catalysts, which can be acidic, basic or organic in nature, usually in molar excess of alcohol. The economy of the process depends

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23

Nnaji, J. C. "ADVANCES IN BIODIESEL SYNTHESIS: THE ROLE OF VARIOUS CATALYSTS." Open Journal of Engineering Science (ISSN: 2734-2115) 1, no. 1 (2020): 53–71. http://dx.doi.org/10.52417/ojes.v1i1.83.

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Biodiesel is a renewable, clean-burning, and biodegradable fuel which can be synthesized from readily available domestic and natural sources, such as edible, non-edible and waste cooking oils, which may serve as a substitute to petro-diesel. It is produced by catalytic transesterification of fats and oils. A number of researches has been devoted to discovering a benign catalyst, especially heterogeneous acid catalyst that could convert non-edible and waste cooking oils with high free fatty acid into biodiesel, in an attempt to reduce the cost of production. The cost of production of biodiesel

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Hasan, Noor Hadi, and Nabeel Ibrahim Hasan. "Agricultural Waste Liquefied Hydrothermally using Heterogeneous Catalyst." IOP Conference Series: Earth and Environmental Science 1259, no. 1 (2023): 012032. http://dx.doi.org/10.1088/1755-1315/1259/1/012032.

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Abstract Due to its abundance and sustainability, lignocellulosic biomass is a possible replacement for petroleum oil in the production of energy and chemicals. Numerous thermochemical processes have been used in significant study to turn biomass into products with added value. One of the best methods for creating bio-fuels and bio-based compounds among them is hydrothermal liquefaction (HTL). However, a number of technological obstacles still need to be removed before HTL technology can be widely used in industry. Hydrothermal liquefaction is now thought to be amongst the most popular effecti

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Lubkov, M. V., and O. O. Zakharchuk. "Modeling of oil phase displacement processes in heterogeneous anisotropic reservoirs." Geofizicheskiy Zhurnal 43, no. 3 (2021): 170–80. http://dx.doi.org/10.24028/gzh.v43i3.236387.

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Methods of computer modeling of slightly permeable anisotropic oil-bearing layers are needed nowadays because they give us a possibility to obtain a concept on filtration processes near producing and forcing wells in different practical situations and in this way to raise the level of exploitation of such layers significantly. On the other hand, they allow evaluation and taking into account some uncertainties which appear as a result of inefficient information on the structure and properties of the layer outside the wells. In order to investigate the practical aspects of supporting efficiency

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Xue, L. K., T. Wang, J. Gao, et al. "Ozone production in four major cities of China: sensitivity to ozone precursors and heterogeneous processes." Atmospheric Chemistry and Physics Discussions 13, no. 10 (2013): 27243–85. http://dx.doi.org/10.5194/acpd-13-27243-2013.

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Abstract. Despite a large volume of research over a number of years, our understandings of the key precursors that control tropospheric ozone production and the impacts of heterogeneous processes remain incomplete. In this study, we analyze measurements of ozone and its precursors made at rural/suburban sites downwind of four large Chinese cities – Beijing, Shanghai, Guangzhou and Lanzhou. At each site the same measurement techniques were utilized and a photochemical box model based on the Master Chemical Mechanism (v3.2) was applied, to minimize uncertainties in comparison of the results due

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Ali Nasr Abdulkareem and Nurul Fitriah Nasir. "A Comprehensive Review of Biodiesel Production using Heterogeneous Catalyst." Journal of Advanced Research in Micro and Nano Engineering 22, no. 1 (2024): 103–15. http://dx.doi.org/10.37934/armne.22.1.103115.

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Biodiesel, an eco-friendly alternative to petroleum diesel, is derived from vegetable oils or animal fats through transesterification. The use of heterogeneous catalysts, specifically titanium dioxide (TiO2) and calcium oxide (CaO), in biodiesel production has garnered significant attention due to their environmental benefits and potential to replace fossil fuels. This study systematically analyses biodiesel production using TiO2-CaO catalysts, highlighting their efficiency under various reaction conditions, catalyst preparation methods, and operational parameters. Different feedstocks, such a

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Pham, Anh Tuan. "(Invited) Multiscale Modeling of Heterogeneous Interfaces for Hydrogen Production." ECS Meeting Abstracts MA2023-02, no. 48 (2023): 2409. http://dx.doi.org/10.1149/ma2023-02482409mtgabs.

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Improving performance of hydrogen production devices requires a detailed understanding of physicochemical processes at solid-gas and solid-liquid interfaces. However, probing behavior of these interfaces under working conditions remain a significant challenge for both simulations and experimental techniques. In this talk, I will provide an overview of our strategy for simulating heterogeneous interfaces within the HydroGEN Advanced Water Splitting Materials Consortium, ranging from first-principles calculations of chemical reactivity to machine learning approaches for accelerating theory-exper

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29

Lantos, Joseph, Narendra Kumar, and Basudeb Saha. "A Comprehensive Review of Fine Chemical Production Using Metal-Modified and Acidic Microporous and Mesoporous Catalytic Materials." Catalysts 14, no. 5 (2024): 317. http://dx.doi.org/10.3390/catal14050317.

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Fine chemicals are produced in small annual volume batch processes (often <10,000 tonnes per year), with a high associated price (usually >USD 10/kg). As a result of their usage in the production of speciality chemicals, in areas including agrochemicals, fragrances, and pharmaceuticals, the need for them will remain high for the foreseeable future. This review article assesses current methods used to produce fine chemicals with heterogeneous catalysts, including both well-established and newer experimental methods. A wide range of methods, utilising microporous and mesoporous catalysts,

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Porshnev, Sergey, Andrey Borodin, Olga Ponomareva, Sergey Mirvoda, and Olga Chernova. "The Development of a Heterogeneous MP Data Model Based on the Ontological Approach." Symmetry 13, no. 5 (2021): 813. http://dx.doi.org/10.3390/sym13050813.

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The article discusses the approaches providing symmetric access of all industrial production services to the data of business processes of the enterprise by building a single warehouse of heterogeneous data of a metallurgical production. The warehouse is a part of an automated statistic quality control system for the products of a metallurgical enterprise. The article describes an ontological storage model of data coming from various sources of information in the production process. The concept of “a unit of production of metallurgical production” is introduced that is the connecting component

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Evseev, A. V., I. A. Yuraskova, D. A. Karpilov, and Ya A. Cherkaev. "PROVIDING CONTROL OVER THE PRODUCTION OF HETEROGENEOUS COMPOSITIONS FROM DISCRETE AND CONTINUOUS STREAMS OF COMPONENTS." DYNAMICS OF SYSTEMS, MECHANISMS AND MACHINES 12, no. 3 (2024): 44–50. https://doi.org/10.25206/2310-9793-2024-12-3-44-50.

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The paper proposes two technological methods for the production of heterogeneous compositions that provide a guaranteed level of quality indicators, which cannot be obtained by traditional probabilistic mixing methods. Therefore, the study considers the production of heterogeneous compositions using dosing machines of various designs to ensure continuous and discrete flows of their components, followed by the synthesis of composites from them for various purposes and uses. This problem is solved by implementing promising technological processes for the deterministic formation of uniformity of

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Chandra Kishore, Somasundaram, Suguna Perumal, Raji Atchudan, et al. "A Review of Biomass-Derived Heterogeneous Catalysts for Biodiesel Production." Catalysts 12, no. 12 (2022): 1501. http://dx.doi.org/10.3390/catal12121501.

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The scientific community is being forced to consider alternative renewable fuels such as biodiesel as a result of the sharp increases in the price of petroleum and the increased demand for petroleum-derived products. Transesterification is a technique used to create biodiesel where a variety of edible oils, non-edible oils, and animal fats are used. For this, either a homogeneous or heterogeneous catalyst is utilized. An appropriate catalyst is chosen based on the quantity of free fatty acid content in the oil. The main distinction between homogeneous and heterogeneous catalysts is that compar

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Miladinovic, Marija, Ivana Lukic, Olivera Stamenkovic, Vlada Veljkovic, and Dejan Skala. "Heterogeneous base-catalyzed methanolysis of vegetable oils: State of art." Chemical Industry 64, no. 2 (2010): 63–80. http://dx.doi.org/10.2298/hemind100304012m.

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Today, homogeneous base-catalyzed methanolysis is most frequently used method for industrial biodiesel production. High requirements for the quality of feedstocks and the problems related to a huge amount of wastewaters have led to the development of novel biodiesel production technologies. Among them, the most important is heterogeneous base-catalyzed methanolysis, which has been intensively investigated in the last decade in order to develop new catalytic systems, to optimize the reaction conditions and to recycle catalysts. These studies are a base for developing continuous biodiesel produc

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Horak, Tibor, Peter Strelec, Michal Kebisek, Pavol Tanuska, and Andrea Vaclavova. "Data Integration from Heterogeneous Control Levels for the Purposes of Analysis within Industry 4.0 Concept." Sensors 22, no. 24 (2022): 9860. http://dx.doi.org/10.3390/s22249860.

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Small- and medium-sized manufacturing companies must adapt their production processes more quickly. The speed with which enterprises can apply a change in the context of data integration and historicization affects their business. This article presents the possibilities of implementing the integration of control processes using modern technologies that will enable the adaptation of production lines. Integration using an object-oriented approach is suitable for complex tasks. Another approach is data integration using the entity referred to as tagging (TAG). Tagging is essential to apply for fa

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Fernandez Arroiabe, Peru, Jon Iturralde Iñarga, Mercedes Gómez de Arteche Botas, et al. "Design of a radiative heat recuperator for steel processes." MATEC Web of Conferences 330 (2020): 01034. http://dx.doi.org/10.1051/matecconf/202033001034.

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In recent years, there has been an increasing interest in the recovery of the waste heat of steel and glass processes. This work proposes a numerical study of a waste heat exchanger system for steel production processes. The radiative energy is transferred to a commercial oil, which can be used to produce electricity. The behavior of the recuperator is analysed using a 3D numerical model, considering the constrains of a real production plant. The influence of the radiation properties of the materials on the temperature and heat transfer rate are also examined. The results show that the absorpt

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Conger, Muhammed, and İbrahim Develi. "Innovative 3D Heterogeneous Chip Manufacturing Approach to the Problem of Approaching Physical Limits with Traditional Chip Manufacturing Technologies." International Conference on Recent Academic Studies 1 (May 12, 2023): 172–78. http://dx.doi.org/10.59287/icras.691.

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The 3D heterogeneous chip manufacturing approach is an innovative technological approachthat has significant future potential. This innovative manufacturing process enables different semiconductormaterials to be used in a single chip. It also offers higher performance and more functionality thantraditional chips. 3D heterogeneous chip fabrication is accomplished by combining different semiconductormaterials. These materials may include semiconductors with different electronic properties. While allcomponents are made of the same semiconductor material in traditional chip manufacturing processes

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Yadav, Gaurav, Nidhi Yadav, and Md Ahmaruzzaman. "Advances in biomass derived low-cost carbon catalyst for biodiesel production: preparation methods, reaction conditions, and mechanisms." RSC Advances 13, no. 33 (2023): 23197–210. http://dx.doi.org/10.1039/d3ra03561a.

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Biodiesel is a less hazardous, environmentally friendly biofuel. Waste biomass derived heterogeneous sulfonated catalysts were a significant focus of the most advanced biodiesel processing techniques for simple and low-cost manufacturing processes.

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Stamenkovic, Ivica, Ivana Bankovic-Ilic, Olivera Stamenkovic, Vlada Veljkovic, and Dejan Skala. "Continuous biodisel productions: A review." Chemical Industry 63, no. 1 (2009): 1–10. http://dx.doi.org/10.2298/hemind0901001s.

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Continuous biodiesel production on laboratory and industrial scale was analyzed, with focus on their advantages and disadvantages. Attention was paid to specific characteristics of industrial processes in order to point out the advanced technologies. The well-known base-catalyzed continuous biodiesel production processes are related to problems caused by the immiscibility of the reactants (alcohol and oil), application of relatively high operating temperature (usually the boiling temperature of alcohol or one near it) and obtained yield of methyl ester yields lower than desired. One way to ove

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Meisen, Tobias, Rudolf Reinhard, Thomas Beer, Daniel Schilberg, and Sabina Jeschke. "IT-Infrastructure for an Integrated Visual Analysis of Distributed Heterogeneous Simulations." Advanced Materials Research 328-330 (September 2011): 1940–46. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.1940.

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Computational simulations are used for the optimization of production processes in order to significantly reduce the need for costly experimental optimization approaches. Yet individual simulations can rarely describe more than a single production step. Hence, a set of simulations has to be used to simulate a contiguous representation of a complete production process. Besides, simulated results have to be analyzed by domain experts to gather insight from the performed computations. In this paper, an IT-infrastructure is proposed that aims at a rather non-intrusive way of interconnecting sim

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Palma, Vincenzo, Daniela Barba, Marta Cortese, Marco Martino, Simona Renda, and Eugenio Meloni. "Microwaves and Heterogeneous Catalysis: A Review on Selected Catalytic Processes." Catalysts 10, no. 2 (2020): 246. http://dx.doi.org/10.3390/catal10020246.

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Since the late 1980s, the scientific community has been attracted to microwave energy as an alternative method of heating, due to the advantages that this technology offers over conventional heating technologies. In fact, differently from these, the microwave heating mechanism is a volumetric process in which heat is generated within the material itself, and, consequently, it can be very rapid and selective. In this way, the microwave-susceptible material can absorb the energy embodied in the microwaves. Application of the microwave heating technique to a chemical process can lead to both a re

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Safarov, N. M., F. B. Ismayilova, and S. G. Hajizade. "Development of the diasgnostic method for determination of density of «water-oil-sand» type mixtures." SOCAR Proceedings, no. 2 (June 30, 2022): 073–77. http://dx.doi.org/10.5510/ogp20220200677.

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In this article has been proposed empirical dependencies for the direct determination – without mathematical calculations or experimental measurements of density of “water-oil-sand” type rheological complex mixtures resulting from arbitrary mixing of oil with water and sand in the processes of production, collection and transportation of well products. Also, based on the application of «Colour characteristics», a new diagnostic method that allows to explain the dependence of density, which is one of the main quality indicators of heterogeneous liquids transported by pipeline, on watering and t

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José da Silva, Márcio, and Abiney Lemos Cardoso. "Heterogeneous Tin Catalysts Applied to the Esterification and Transesterification Reactions." Journal of Catalysts 2013 (November 20, 2013): 1–11. http://dx.doi.org/10.1155/2013/510509.

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The interest in the development of efficient and environmentally benign catalysts for esters synthesis has increased exponentially, mainly due to the demand for biodiesel. In general, fatty esters are used as bioadditive, cosmetic ingredients, polymers, and, more recently, biofuel. Nevertheless, most of the production processes use nonrecyclable and homogenous alkaline catalysts, which results in the reactors corrosion, large generation of effluents, and residues on the steps of separation and catalyst neutralization. Heterogeneous acid catalysts can answer these demands and are an environment

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Lubkov, M., and O. Zakharchuk. "Influence of heterogeneous permeability distribution on filtration processes around the acting gas production horizontal well." Collection of Research Papers of the National Mining University 66 (2021): 193–204. http://dx.doi.org/10.33271/crpnmu/66.193.

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Qu, Shuhui, Kasra Yazdani, and Janghwan Lee. "32‐3: Heterogeneous Resource Constrained Reinforcement Learning Photolithography Scheduler with Heterogeneous Graph Attention Network." SID Symposium Digest of Technical Papers 55, no. 1 (2024): 417–20. http://dx.doi.org/10.1002/sdtp.17546.

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In mass manufacturing of OLED displays, photolithography process is a critical bottleneck in production capacity. As a result, effective scheduling of the photolithography process is crucial to the overall throughput, productivity, and efficiency of the production. The processing of OLED panels depends upon heterogeneous resources. Aside from that, the complexity, stochastic nature, and highly dynamic characteristic of the processpresent considerable challenges. To address these, we propose a new framework employing a heterogeneous graph neural networkbased Rainbow algorithm. This framework op

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Kumawat, Jugal, and Virendra Kumar Gupta. "Fundamental aspects of heterogeneous Ziegler–Natta olefin polymerization catalysis: an experimental and computational overview." Polymer Chemistry 11, no. 38 (2020): 6107–28. http://dx.doi.org/10.1039/d0py00753f.

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Newton, P. F., and P. A. Jolliffe. "Assessing processes of intraspecific competition within spatially heterogeneous black spruce stands." Canadian Journal of Forest Research 28, no. 2 (1998): 259–75. http://dx.doi.org/10.1139/x97-192.

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The objective of this study was to develop and subsequently apply an individual-tree analytical approach for assessing resource competition processes within monospecific, even-aged, and spatially heterogeneous black spruce (Picea mariana (Mill.) BSP) stands. The approach consisted of five basic steps: (1) ranking competitors with respect to subject tree size using a relative scale, (2) stratifying competitors into competition strata based on their relative size differential with respect to a subject tree, (3) quantifying the intensity of competition within each stratum using spatially explicit

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Валентина Сергеевна, Носаева,, and Степачёва, Антонина Анатольевна. "VERATROL PRODUCTION IN THE PRESENCE OF ZEOLITEBASED CATALYSTS." Вестник Тверского государственного университета. Серия: Химия, no. 4(50) (January 18, 2023): 15–20. http://dx.doi.org/10.26456/vtchem2022.4.2.

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Вератрол находит широкое применение в фармацевтической, пищевой, парфюмерной промышленности. Это соединение является полупродуктом во многих синтезах. Получение вератрола сопряжено с использованием токсичных и опасных компонентов. Это приводит к необходимости в трудоемкой очистке продукта. С целью снижения себестоимости и минимизации очистки многообещающим является применение гетерогенных катализаторов метилирования. В данной работе приводятся результаты исследования возможности синтеза вератрола из гваякола с использованием кислотных катализаторов ± цеолитов. Veratrol is widely used in the ph

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Chen, Xiaoyan, Taoyue Yuan, Xinyu Yang, Shunke Ding, and Mengtao Ma. "Insights into Photo/Electrocatalysts for the Degradation of Per- and Polyfluoroalkyl Substances (PFAS) by Advanced Oxidation Processes." Catalysts 13, no. 9 (2023): 1308. http://dx.doi.org/10.3390/catal13091308.

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Per- and polyfluoroalkyl substances (PFASs) are an emerging group of persistent organic pollutants in aquatic environments with high levels of toxicity and bioaccumulation. The risks posed by PFASs to the environment and health have attracted increasing attention. To remove them from water, advanced oxidation processes (AOPs), with the merits of high efficiency and low cost, are mainly used. Photo/electrocatalytic heterogeneous AOPs, with the assistance of nanostructured catalysts and external energy in the form of light/electricity, have emerged as one of the most powerful techniques, overcom

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Damera, Thirupathi, Ramakanth Pagadala, Surjyakanta Rana, and Sreekantha Babu Jonnalagadda. "A Concise Review of Multicomponent Reactions Using Novel Heterogeneous Catalysts under Microwave Irradiation." Catalysts 13, no. 7 (2023): 1034. http://dx.doi.org/10.3390/catal13071034.

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Multi-component reactions for the construction of heterocycles have been fascinated by microwave energy as an alternative technique of heating, owing to the advantages over traditional reflux methods. The heterogeneous catalysts contribute significantly towards recycling, harmless, easy filtration, catalyst preparation, more life span, abundance, and product yields. With novel and creative uses in organic and peptide synthesis, polymer chemistry, material sciences, nanotechnology, and biological processes, the usage of microwave energy has rapidly increased during the past 20 years. This artic

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Cooper, Khershed P., and Samuel G. Lambrakos. "Thermal Modeling of Direct Digital Melt-Deposition Processes." Materials Science Forum 654-656 (June 2010): 1540–44. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1540.

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Additive manufacturing involves creating three-dimensional objects by depositing materials layer-by-layer. The freeform nature of the method permits the production of components with complex geometry. Deposition processes provide one more capability, which is the addition of multiple materials in a discrete manner to create “heterogeneous” objects with locally controlled composition. The result is direct digital manufacturing (DDM) by which dissimilar materials are added voxel-by-voxel (a voxel is volumetric pixel) following a predetermined tool-path. A typical example is functionally-graded m

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