Relevant bibliographies by topics / Hydrothermal activation

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Hydrothermal activation'

Author: Grafiati
Published: 28 May 2022
Last updated: 30 July 2025

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Journal articles on the topic "Hydrothermal activation"

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Park, Jung Eun, Gi Bbum Lee, Ho Kim, and Bum Ui Hong. "High Surface Area–Activated Carbon Production from Cow Manure Controlled by Heat Treatment Conditions." Processes 10, no. 7 (2022): 1282. http://dx.doi.org/10.3390/pr10071282.

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In this study, methods of adding value to cow manure were studied. Due to the properties of cow manure, activated carbon with a high surface area can only be produced by increasing the fixed carbon ratio and removing the ash content. Activated carbon was fabricated using five different treatments: (1) raw material–chemical activation, (2) raw material–hydrothermal carbonization–chemical activation, (3) raw material–hydrothermal carbonization–chemical activation–acid washing, (4) raw material–hydrothermal carbonization–heat treatment–chemical activation, and (5) raw material–hydrothermal carbon
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Liu, Yu Qin, Hong Tu Xia, and Hong Wen Ma. "Kinetics of Hydrothermal Decomposition of Potassium Feldspar with Calcium Hydroxide." Advanced Materials Research 549 (July 2012): 65–69. http://dx.doi.org/10.4028/www.scientific.net/amr.549.65.

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The aegirine-augite syenite potash ore, taken from Changling, Luonan in Shannxi province, were hydrothermally decomposed over the temperature ranges of 533 K to 563 K using calcium hydroxide as additive. The dissolution ratio of the K2O at different reaction temperature and time was determined. Analysis of the experimental results revealed that the dissolution rate of potash ore satisfies the chemical reaction controlled kinetic equation. The rate constant of hydrothermal reaction at different temperatures was obtained. The activation energy was calculated using the Arrhenius equation. The hyd
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Xu, Jin-Wei, Cheng-Chun Li, Jian-Wei Liu, Wen-Chao Chang, Wen-Shao Chang, and Jyh-Horng Wu. "Assessing the Long-Term Creep Behaviour of Hydrothermally Treated Japanese Cedar Wood Using the Short-Term Accelerated Stepped Isostress Method." Polymers 15, no. 20 (2023): 4149. http://dx.doi.org/10.3390/polym15204149.

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In this study, short-term accelerated creep tests were conducted using the stepped isostress method (SSM) to investigate the impact of hydrothermal treatment on the long-term creep behaviour of Japanese cedar wood and to determine optimal hydrothermal treatment conditions. The results showed that SSM can effectively predict the creep behaviour of hydrothermally treated wood. Among the treatment conditions tested, Japanese cedar wood treated hydrothermally at 180 °C for 4 h exhibited higher flexural strength retention (91%) and moisture excluding efficiency (MEE) (44%) and demonstrated superior
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Sinniha, Shobana, Zaira Zaman Chowdhury, Ahmad Ibn Ibrahimy, et al. "Two step synthesis and application of porous carbon for removal of copper (II) from wastewater: Statistical optimization and equilibrium isotherm analysis." BioResources 19, no. 2 (2024): 3699–724. http://dx.doi.org/10.15376/biores.19.2.3699-3724.

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In this study, activated carbon (ACs) adsorbent was synthesized using the lignocellulosic waste (LCB) seed from Adansonia digitata L. (BSP) using two steps of hydrothermal carbonization (HTC) followed by activation. The hydrothermally produced char of BSP was activated to produce porous activated carbon BSPAC, where K2CO3 was used as a chemical activating agent. Box Behnken Design was used to optimize the input variables of pyrolysis temperature (A1), residence time (B1), and ratio (C1) for the pyrolysis process. Removal percentage (β1), percentage carbon yield (β2), and fixed carbon (β3) perc
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Muravieva, Natalia A., Yuliya V. Kulikova, and Olga O. Babich. "Evaluation of sorption properties of biochar produced by hydrothermal liquefaction of Phragmites australis." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 336, no. 1 (2025): 7–17. https://doi.org/10.18799/24131830/2025/1/4627.

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Relevance. The need to use an innovative method of thermochemical conversion of wet biomass and organic waste – hydrothermal liquefaction. This paper focuses on the further application of the by-product of the process – solid coal residue (biochar). The obtained solid residue is proposed to be used as sorbent. Aim. To evaluate the sorption capacity of carbon residues from hydrothermal liquefaction of common reed, as well as to select methods for their activation. Object. Hydrochar produced by hydrothermal liquefaction from plant biomass – common reed (Phragmites australis). Methods. Hydrotherm
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Vlček, Jozef, Michaela Topinková, Miroslava Klárová, et al. "Alkali-Activated Metakaolin and Fly Ash as Unfired Ceramic Bonding Systems." Minerals 11, no. 2 (2021): 197. http://dx.doi.org/10.3390/min11020197.

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Metakaolin (MK) prepared by the calcination of kaolin at 550 °C and fly ash (FA) from the combustion of black coal in a granulating boiler were used to prepare unfired ceramic bonding systems via the alkali activation process. A long-term stability of the mechanical properties of the prepared samples similar to the unfired ceramic systems was observed. The optimal metakaolin and fly ash ratio, the type of the activator (NaOH or water glass) and its concentration were evaluated after the hydration in: a) laboratory conditions; b) hydration box; and c) under the hydrothermal activation. Raw mate
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Shim, Young Sook, Yeong Seok Yoo, Seung Whee Rhee, and Woo Keun Lee. "Evaluation of Pelletized Adsorbent Made for Removing VOCs by MSWI Fly Ash ( Ⅱ )." Materials Science Forum 510-511 (March 2006): 594–97. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.594.

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The objective of this study is to prepare a pelletized adsorbent to remove volatile organic compounds (VOC) from the municipal solid waste incinerator (MSWI) fly ash in Korea. The fly ash sample was sieved to particle size of 75-150㎛, and then a hydrothermal processing was carried out. The pelletized adsorbent was prepared from hydrothermal treated fly ash by mixing it with coal tar pitch and K2CO3 as a carbon source and activating agent, and activating them. The optimum condition to derive maximum iodine adsorptivity and BET surface area was the mixing ratio of hydrothermal treated fly ash, c
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Kong, Qing Qiu, Guo Jun Ke, and Dan Wang. "Studies on Exciting the Activity of Waste Glass Powder by Hydrothermal Activation." Advanced Materials Research 871 (December 2013): 171–78. http://dx.doi.org/10.4028/www.scientific.net/amr.871.171.

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The effect of hydrothermal activation indifferent temperature and pressure conditions on the pozzolanic activity of waste glass powder was discussed. The waste glass powder was treated at 108°C, 0.15MPa, 116°C, 0.18MPa and 121°C, 0.2MPa for 2h in an autoclave respectively after milling to 4215cm2/g. Mortar was made with untreated and hydrothermal activated waste glass power replacement of cement at 20% respectively, then tested for compressive strength at 3, 7, 14 , 28 and 90 days. Results showed that compressive strength of cement mortar had varying degrees of decline when replacing cement wi
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Wei, Juntao, Jiawei Sun, Deliang Xu, et al. "Preparation and Electrochemical Performance of Bio-Oil-Derived Hydrochar as a Supercapacitor Electrode Material." International Journal of Environmental Research and Public Health 20, no. 2 (2023): 1355. http://dx.doi.org/10.3390/ijerph20021355.

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The rapid consumption of fossil energy and the urgent demand for sustainable development have significantly promoted worldwide efforts to explore new technology for energy conversion and storage. Carbon-based supercapacitors have received increasing attention. The use of biomass and waste as a carbon precursor is environmentally friendly and economical. In this study, hydrothermal pretreatment was used to synthetize coke from bio-oil, which can create a honeycomb-like structure that is advantageous for electrolyte transport. Furthermore, hydrothermal pretreatment, which is low in temperature,
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Asawaworarit, Panuruj, Nuwong Chollacoop, Nawin Viriya-Empikul, and Apiluck Eiad-Ua. "Effect of Alkaline Activation on Low Grade Natural Kaolin for Synthesis of Zeolite A." Materials Science Forum 872 (September 2016): 206–10. http://dx.doi.org/10.4028/www.scientific.net/msf.872.206.

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The conventional technique to synthesizes zeolite A from kaolin is calcination. However, this technique has one drawback since, the impurities in kaolin, such as muscovite and quartz, remain. Therefore, the hydrothermal process without calcination is used to synthesize high purity zeolite A. Hydrothermal synthesis without calcination can be separated into two steps, namely first and second hydrothermal steps. Alkaline activation reaction in the first hydrothermal step was used to study the effect of NaOH concentration ranging from 4M, 6M, 8M, 10M to 12M at 200°C for 3 hours. In this step, sodi
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Dissertations / Theses on the topic "Hydrothermal activation"

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Khalameida, S., V. Sydorchuk, J. Skubiszewska-Zieba, R. Leboda, and V. Zazhigalov. "Mechanochemical, Sonochemical and Hydrothermal Activation of Niobium Pentoxide and its Catalytic Properties." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35157.

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Modification of niobium pentoxide with different dispersity via mechanochemical, ultrasound, hydrothermal and microwave treatments (MChT, UST, HTT, and MWT, respectively) has been studied. All types of treatment do not change of phase composition but leads to improvement (at HTT and MWT) or, on contrary, breaking of crystal structure (at MChT and UST) and variation of crystallite size and specific surface area. UV-Vis measurements display increase of absorption in visible region. As a result, modified samples show higher photocatalytic activity at degradation of rhodamine B under visible
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Parlatore, Lancha Julia. "A multiscale approach to understand and predict the effects of hydrothermal treatment on lignocellulosic biomass In situ measurements of viscoelastic properties of biomass during hydrothermal treatment to assess the kinetics of chemical alterations." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASC023.

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La biomasse lignocellulosique est une matière première prometteuse pour la production de biocarburants et de produits chimiques renouvelables. Cependant, en raison de la structure macromoléculaire récalcitrante des tiges de plantes, un prétraitement est nécessaire pour rendre les glucides suffisamment accessibles pour l'hydrolyse enzymatique. Parmi la vaste gamme de prétraitements disponibles, l'explosion à la vapeur se distingue car elle ne nécessite pas de solvant et peut être appliquée à diverses matières premières. Elle se déroule en deux étapes : une cuisson acide suivie d'une décompressi
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Aymonier, Cyril. "Traitement hydrothermal de déchets industriels spéciaux : données pour le dimensionnement d'installations industrielles et concepts innovants de réacteurs sonochimique et électrochimique." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2000. http://tel.archives-ouvertes.fr/tel-00007553.

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Les procédés d'oxydation hydrothermale offrent une alternative technico-économique viable pour le traitement des déchets aqueux industriels spéciaux. Afin de promouvoir le développement de cette technologie, des données, nécessaires au dimensionnement des réacteurs, concernant les mécanismes et les chaleurs globales des réactions d'oxydation hydrothermale ont été déterminées. Le mécanisme de la réaction d'oxydation d'une molécule contenant des atomes d'azote, le fénuron (C6H5-NH-CO-N(CH3)2), a été proposé et la chaleur globale de la réaction d'oxydation de l'acide acétique a été évaluée à -925
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Georgakopoulos, Evangelos D. "Iron and steel slag valorization through carbonation and supplementary processes." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/12323.

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Alkaline industrial wastes are considered potential resources for the mitigation of CO2 emissions by simultaneously capturing and sequestering CO2 through mineralization. Mineralization safely and permanently stores CO2 through its reaction with alkaline earth metals. Apart from natural formations, these elements can also be found in a variety of abundantly available industrial wastes that have high reactivity with CO2, and that are generated close to the emission point-sources. Apparently, it is the applicability and marketability of the carbonated products that define to a great extent the e
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Dlabajová, Lucie. "Příprava tobermoritu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-432969.

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This doctoral thesis is focused on the study of reactions in the CaO–SiO2–H2O complex system, primarily to the synthesis of crystalline tobermorite. Hydrothermal conditions are necessary for the formation of crystalline tobermorite, whereas the course of the reaction is influenced by several factors. The main studied factor was the choice of the silica sources differing in means of solubility, crystallinity, particle size distribution, specific surface area, and purity. The water-to-solid ratio turned to be also an important factor as the length of the hydrothermal reaction. The influence of t
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Galvánková, Lucie. "Možnosti využití vedlejších energetických produktů jako surovin pro hydrotermální reakce." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-217109.

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The aim of this master thesis is study of possibilities of processing energy by-products, especially coal fly ash and fluidized bed ash, by hydrothermal treatment. Thanks to hydrothermal conditions and proper alkali activation of ashes we can obtain zeolites. Zeolites are microporous crystalline aluminosilicates which are use in many industrial sectors as catalysts, adsorbents and very good ion exchangers. The results of hydrothermal synthesis are influenced by many variable factors. This thesis mainly focused on influence of chosen alkali activator and the concentration of the activator toget
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(8604438), Philip Morgan Kester. "Hydrothermal synthesis methods to influence active site and crystallite properties of zeolites and consequences for catalytic alkane activation." Thesis, 2020.

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Zeolites are crystalline microporous solid acids composed of silica-rich frameworks with aliovalent Al heteroatoms substituted in crystallographically-distinct location sand arrangements, which generate anionic lattice charges that can be compensated by protons and extra framework metal cations or complexes that behave as catalytic active sites. Protons that charge-compensate Al are similar in Brønsted acid strength, yet differ in reactivity because their bound intermediates and transition states are stabilized by van der Waals interactions with confining microporous cavities, and
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Book chapters on the topic "Hydrothermal activation"

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Wang, Yuanqing, and Fangming Jin. "Catalytic Hydrothermal Reactions for Small Molecules Activation." In Hydrothermal Reduction of Carbon Dioxide to Low- Carbon Fuels. CRC Press, 2017. http://dx.doi.org/10.1201/9781351262842-2.

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Wu, Zhaofeng, Jun Sun, Ping Hu, and Weijin Wang. "Preparation of Biomass Carbon Materials and Their Several Typical Applications." In Biomass Based Products [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1007808.

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In this chapter, “Preparation of Biomass Carbon Materials and Their Several Typical Applications,” we delve into the realm of transforming biomass waste into valuable carbon materials. The scope encompasses a comprehensive overview of various biomass sources, highlighting their abundance and renewability as precursors. We explore diverse preparation methods, ranging from traditional pyrolysis and hydrothermal carbonization to more advanced techniques like chemical activation and templating that convert these wastes into high-performance carbon materials. Furthermore, the chapter showcases seve
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Sims, K. W. W., H. E. Newsom, and E. S. Gladney. "Chemical Fractionation During Formation Of The Earth’s Core And Continental Crust: Clues From As, Sb, W, And Mo." In Origin of the Earth. Oxford University PressNew York, NY, 1990. http://dx.doi.org/10.1093/oso/9780195066197.003.0017.

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Abstract We have analyzed suites of continental crustal rocks of different geologic ages, as well as midocean ridge and ocean island samples for As, Sb, W, and Mo, using radiochemical, thermal, and epithermal neutron activation analysis. The oceanic data show that Mo, As, and Sb have the same incompatible behavior as the light rare earth elements ( e.g., Ce) during igneous fractionation, while W behaves as a highly incompatible element and correlates with Ba The Mo/Ce ratio is the same in oceanic and crustal materials. However, crustal-derived materials, including Archean shales, appear to be
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Chandola, Dinesh, and Smita Rana. "Biochar for Environmental Remediation." In Biochar - Productive Technologies, Properties and Application [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105430.

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The environment is deteriorating rapidly, and it is essential to restore it as soon as possible. Biochar is a carbon-rich pyrolysis result of various organic waste feedstocks that has generated widespread attention due to its wide range of applications for removing pollutants and restoring the environment. Biochar is a recalcitrant, stable organic carbon molecule formed when biomass is heated to temperatures ranging from 300°C to 1000°C under low (ideally zero) oxygen concentrations. The raw organic feedstocks include agricultural waste, forestry waste, sewage sludge, wood chips, manure, and m
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Conference papers on the topic "Hydrothermal activation"

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Izzuddin, Izura, Siti Aishah Ahmad Fuzi, and Sapizah Rahim. "Effect of Eu<sup>2+</sup> Activator on the Structural and Optical Properties of BaBrX(X= F, Cl, I) Synthesized via Hydrothermal Method." In International Conference on X-Rays and Related Techniques in Research and Industry 2023. Trans Tech Publications Ltd, 2025. https://doi.org/10.4028/p-1qqznw.

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Barium halide activated with Eu is a typical phosphor material used in imaging plates for computed radiography applications. In this study, BaBrX: Eu (X = Cl, I) was synthesized via the hydrothermal technique. The aim of this study is to further explore the feasibility of the hydrothermal method for synthesizing phosphor materials. This was determined by studying the effect of Eu addition on the structural and optical properties of BaBrX (X = Cl, I). X-ray diffraction (XRD) was employed to determine the crystallinity of the prepared samples, while optical properties were observed using photolu
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ADAMCZYK, Zdzislaw. "HYDROTHERMAL ACTIVATION OF FLY ASH FROM BROWN COAL COMBUSTION." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/1.4/s04.011.

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Kapidžić, Minea, Sonja Kastratović, Milica Vujković, Veselinka Grudić, and Jana Mišurović. "The interdependence of structural properties and pseudocapacitive behavior of biomass-derived activated carbon." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.257k.

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Montenegro produces a significant amount of grapes annually for both commercial and domestic purposes. Wooden biowaste that is left after grooming poses an environmental issue as it calls for an adequate management plan. This study investigates hydrothermal treatment as an efficient strategy to convert this abundant waste into a high-quality, carbon-based energy storage material. The activation process took place in a hydrothermal reactor with ZnCl2 aqueous suspension under 200°C. The material was further carbonized at 700 °C until lignin, cellulose, and hemicellulose completely decomposed. Th
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Kristianto, Hans, Ratna Frida Susanti, Arenst Andreas Arie, Filbert Christian Ondy, Claudius Chrismanto, and Hary Devianto. "Synthesis of activated carbon from Salacca peel using hydrothermal carbonization and microwave assisted chemical activation as promising supercapacitor's electrode." In INTERNATIONAL CONFERENCE ON TRENDS IN MATERIAL SCIENCE AND INVENTIVE MATERIALS: ICTMIM 2020. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0013599.

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Liamprawat, Tanatorn, Panupong Verasarut, Napat Kaewtrakulchai, et al. "Synthesis of porous carbon materials from water hyacinth via hydrothermal carbonization assisted chemical activation for carbon-based electrode applications." In THE SECOND MATERIALS RESEARCH SOCIETY OF THAILAND INTERNATIONAL CONFERENCE. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0025042.

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Vakhin, Alexey V., Irek I. Mukhamatdinov, Firdavs A. Aliev, et al. "Industrial Application of Nickel Tallate Catalyst During Cyclic Steam Stimulation in Boca De Jaruco Reservoir." In SPE Russian Petroleum Technology Conference. SPE, 2021. http://dx.doi.org/10.2118/206419-ms.

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Abstract A nickel-based catalyst precursor has been synthesized for in-situ upgrading of heavy crude oil that is capable of increasing the efficiency of steam stimulation techniques. The precursor activation occurs due to the decomposition of nickel tallate under hydrothermal conditions. The aim of this study is to analyze the efficiency of in-situ catalytic upgrading of heavy oil from laboratory scale experiments to the field-scale implementation in Boca de Jaruco reservoir. The proposed catalytic composition for in-reservoir chemical transformation of heavy oil and natural bitumen is compose
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Huang, Rui, Fengshou Zhang, Mengke An, and Derek Elsworth. "Nucleation of Instability on Granitoid Faults Under Hydrothermal Conditions: Implications for Fluid Injection-Induced Seismicity." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-0039.

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ABSTRACT: Typical in the development of enhanced geothermal systems (EGS), fluid injection for hydraulic stimulation and fracturing hosts the potential for induced seismicity by reactivating deep faults. We use granite cores from the Pohang EGS site in low velocity shear experiments on simulated fault gouges at confining stresses of 110 MPa, temperatures of 100-250 °C and fluid pressures of 21-80 MPa. These experimental conditions are representative of deep geothermal reservoirs and allow the influence of variations in temperature and effective stress to be explored on the nucleation of instab
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