Modeling of Thermochemical Processes for Efficient Feedstock Utilization

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Chemical Processes and Systems".

Deadline for manuscript submissions: closed (25 March 2024) | Viewed by 371

Special Issue Editors


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Guest Editor
Laboratory for Thermal Analysis, Faculty of Mechanical Engineering, University of Belgrade, 11000 Belgrade, Serbia
Interests: thermal analysis; TG-DTG; mass spectrometry; kinetic modeling; thermochmemical conversion modeling; renewable energy sources; biomass; waste materials; combustion; pyrolisis; gasification; pellet stoves and boilers; emission control

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Guest Editor
“Vinča” Institute of Nuclear Sciences—National Institute of the Republic of Serbia, Department of Physical Chemistry, University of Belgrade, 11000 Belgrade, Serbia
Interests: biomass; thermochemical conversion; solid state kinetics; reaction mechanisms; catalysis; thermodynamics; energy storage materials; thermal analysis; polymers; hydrogen fuels; physicochemical characterization of materials

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Guest Editor
Fuel and Combustion Laboratory, Faculty of Mechanical Engineering, University of Belgrade, 11000 Belgrade, Serbia
Interests: fuel characterization; renewable energy sources; biomass; biofuels; biorefinery; waste materials; pyrolisis; gasification; combustion; pellet stoves and boilers; emission control; decarbnization

Special Issue Information

Dear Colleagues,

To address the issues related to the problems of energy production and the unequal distribution of fossil fuel reserves, it is crucial to more efficiently utilize a variety of feedstocks that are more available, particularly raw biomass, but also the organic component of waste from industrial production or MSW. To achieve this goal, the thermochemical conversion processes of common feedstocks are frequently studied. In spite of this, a thorough procedure of characterizing each type of mentioned raw material is required, as these are considered waste materials of organic origin and require adaptation to a specific process of thermochemical conversion due to their diversity and specificity. Furthermore, the detailed modeling of the thermochemical conversion for a particular feedstock is a crucial step in making the overall energy or material transformation efficient and sustainable. This means that the materials under consideration are not necessarily a source of energy and that other, more advantageous, efficient, and ultimately, economically more favourable, ways of converting them can be identified. This allows for the production of a broader range of value-added products that may be made available to consumers. With the availability of raw materials that have generally uniform uses around the world, this strategy is in line with the modern concept of biorefinery, which enables indirectly lowering global polarization when it comes to energy and feedstock concerns.

Prof. Dr. Nebojša G. Manić
Dr. Bojan Ž. Janković
Prof. Dr. Dragoslava D. Stojiljković
Guest Editors

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Keywords

  • thermochemical conversion
  • modeling
  • feedstocks
  • value-added products
  • biorefinery concept

Published Papers (1 paper)

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Research

29 pages, 2161 KiB  
Article
CFDs Modeling and Simulation of Wheat Straw Pellet Combustion in a 10 kW Fixed-Bed Downdraft Reactor
by Bidhan Nath, Guangnan Chen, Les Bowtell and Raid Ahmed Mahmood
Processes 2024, 12(5), 863; https://0-doi-org.brum.beds.ac.uk/10.3390/pr12050863 - 25 Apr 2024
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Abstract
This research paper presents a comprehensive study on the combustion of wheat straw pellets in a 10 kW fixed-bed reactor through a Computational Fluid Dynamics (CFDs) simulation and experimental validation. The developed 2D CFDs model in ANSYS meshing simulates the combustion process in [...] Read more.
This research paper presents a comprehensive study on the combustion of wheat straw pellets in a 10 kW fixed-bed reactor through a Computational Fluid Dynamics (CFDs) simulation and experimental validation. The developed 2D CFDs model in ANSYS meshing simulates the combustion process in ANSYS Fluent software 2021 R2. The investigation evaluates key parameters such as equivalence ratio, heating value, and temperature distribution within the reactor to enhance gas production efficiency. The simulated results, including combustion temperature and produced gases (CO2, CO, CH4), demonstrate a significant agreement with experimental combustion data. The impact of the equivalence ratio on the conversion efficiency and lower heating value (LHV) is systematically explored, revealing that an equivalence ratio of 0.35 is optimal for maximum gas production efficiency. The resulting producer gas composition at this optimum condition includes CO (~27.67%), CH4 (~3.29%), CO2 (~11.09%), H2 (~11.09%), and N2 (~51%). The findings contribute valuable insights into improving the efficiency of fixed-bed reactors, offering essential information on performance parameters for sustainable and optimized combustion. Full article
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