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Thermochemical Conversion for Energy Production
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Thermochemical Conversion for Energy Production

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A: Sustainable Energy".

Deadline for manuscript submissions: closed (25 July 2021) | Viewed by 4164

Special Issue Editors

Dr. Igor Donskoy

E-Mail Website
Guest Editor
Melentiev Energy Systems Institute, Siberian Branch of the Russian Academy of Sciences, St. Lermontov 130, 664033 Irkutsk, Russia
Interests: combustion; gasification; pyrolysis; fuel; energy
Dr. Aleksandr Kozlov

E-Mail Website
Guest Editor
Melentiev Energy Systems Institute, Siberian Branch of the Russian Academy of Sciences, st. Lermontov 130, 664033 Irkutsk, Russia
Dr. Denis Svishchev

E-Mail Website
Guest Editor
Melentiev Energy Systems Institute, Siberian Branch of the Russian Academy of Sciences, st. Lermontov 130, 664033 Irkutsk, Russia

Special Issue Information

Dear Colleagues,

This Special Issue is devoted to processes and systems using thermochemical conversion of fuels, including combustion, gasification, pyrolysis, torrefaction, and hydrothermal conversion. Efficient processing of various fuels is one of the most crucial problems in energy and chemical engineering, and studies in this field are motivated by technical, economic, and environmental factors. Organic fuel is still the main energy source today, and it will be for a long time to come. Besides well-known processes, new, efficient methods of thermochemical conversion have been developed, such as chemical looping cycles, catalytic conversion, oxy-fuel conversion, solar-driven conversion, and electrochemical conversion.

There are well-known trends in thermochemical conversion studies. Biomass, being traditionally a main fuel in low-technical level societies, is now an attractive energy source for new, highly efficient units in developed countries due to its renewability and lower harmful emissions. Coal and other fossils, especially high-ash and high-sulphur species, are to be converted in new processes with a special emphasis on cleaning and capture stages. New fuels are being investigated, such as composite fuels, biofuels, metals, ammonia, and industrial wastes. Advanced technologies for both large and small scales of energy units are being developed to increase thermal efficiency and to reduce emissions, so the scope of the Issue is directed to recent progress and new ideas in processes of thermochemical conversion of fuels and promising units based on these processes.

Dr. Igor Donskoy
Dr. Aleksandr Kozlov
Dr. Denis Svishchev
Guest Editors

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Keywords

  • Gasification
  • Pyrolysis
  • Combustion
  • Catalytic conversion
  • Promising energy units and systems
  • Energotechnology
  • Emission reduction
  • Carbon capture
  • New methods of fuel processing
  • New fuels and their reactivity
  • Mathematical modelling and optimization of fuel conversion processes.

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Published Papers (2 papers)

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Research

14 pages, 17583 KiB  
Article
Thermogravimetric Study of the Kinetics of the Reaction C + CO2 under Pore-Diffusion Control
by Igor Donskoy and Aleksandr Kozlov
Energies 2021, 14(7), 1886; https://doi.org/10.3390/en14071886 - 29 Mar 2021
Cited by 3 | Viewed by 1775
Abstract
This study presents experimental studies of charcoal gasification with CO2 at different heating rates (1, 5, 10, 20, and 50 K min−1). The kinetics of the reaction C + CO2 under pore-diffusion control is studied. We propose a new [...] Read more.
This study presents experimental studies of charcoal gasification with CO2 at different heating rates (1, 5, 10, 20, and 50 K min−1). The kinetics of the reaction C + CO2 under pore-diffusion control is studied. We propose a new method for the proper determination of activation energy during the processing of thermogravimetric curves of porous carbon gasification under conditions of pore-diffusion resistance. The results of the inverse kinetic problem solution are compared with different hypotheses about the regime of the investigated heterogeneous reaction process (kinetic, diffusion, pore-diffusion). The change of reaction regimes from kinetic to diffusion is detected during charcoal gasification at different heating rates. At heating rates of 5–20 K min−1, the values of activation energy of carbon gasification reaction in the carbon dioxide atmosphere, obtained by the proposed method, closely match the data found in the previous studies. The use of diffusion models in the processing of thermogravimetric curves determines the conditions under which conventional kinetic models fail to provide adequate information about the temperature dependence of the heterogeneous reaction rate. Full article
(This article belongs to the Special Issue Thermochemical Conversion for Energy Production)
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15 pages, 4001 KiB  
Article
Catalyzed Ethanol Chemical Looping Gasification Mechanism on the Perfect and Reduced Fe2O3 Surfaces
by Laixing Luo, Xing Zheng, Jianye Wang, Wu Qin, Xianbin Xiao and Zongming Zheng
Energies 2021, 14(6), 1663; https://doi.org/10.3390/en14061663 - 17 Mar 2021
Cited by 3 | Viewed by 1943
Abstract
Biomass chemical looping gasification (CLG) is a novel gasification technology for hydrogen production, where the oxygen carrier (OC) transfers lattice oxygen to catalytically oxidize fuel into syngas. However, the OC is gradually reduced, showing different reaction activities in the CLG process. Fully understanding [...] Read more.
Biomass chemical looping gasification (CLG) is a novel gasification technology for hydrogen production, where the oxygen carrier (OC) transfers lattice oxygen to catalytically oxidize fuel into syngas. However, the OC is gradually reduced, showing different reaction activities in the CLG process. Fully understanding the CLG reaction mechanism of fuel molecules on perfect and reduced OC surfaces is necessary, for which the CLG of ethanol using Fe2O3 as the OC was introduced as the probe reaction to perform density functional theory calculations to reveal the decomposition mechanism of ethanol into the synthesis gas (including H2, CH4, ethylene, formaldehyde, acetaldehyde, and CO) on perfect and reduced Fe2O3(001) surfaces. When Fe2O3(001) is reduced to FeO0.375(001), the calculated barrier energy decreases and then increases again, suggesting that the reduction state around FeO(001) favors the catalytic decomposition of ethanol to produce hydrogen, which proves that the degree of reduction has an important effect on the CLG reaction. Full article
(This article belongs to the Special Issue Thermochemical Conversion for Energy Production)
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