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Combustion and Gasification of Solid Fuels

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

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 2161

Special Issue Editor


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Guest Editor
Division of Combustion Technology and Internal Combustion Engines, Institute of Thermal Technology, Silesian University of Technology, 44-100 Gliwice, Poland
Interests: modeling of combustion processes; fuel combustion technology; combustion of solid fuels; modeling of heating systems; gasification of solid fuels

Special Issue Information

Dear Colleagues,

Solid fuels play an important role in the global energy supply. Nowadays, solid fuels are used to produce the largest share of electricity and are the second most important source of primary energy worldwide.

This will definitively change in the near future because of ambitious plans for the radical reduction of CO2 emissions. Because of these changes, the role of solid fossil fuels will decrease, while the importance of biogenic solid fuels, such as biomass, will grow in importance.

It is worth noting that biomass provides the unique opportunity to achieve negative CO2 emissions if it is not burned but converted to biochar, which can then be used for soil improvement. Biomass can also be used as a CO2-neutral source of energy and can be used directly or for other fuel production, such as bi-liquid or syngas. The reasonable utilization of solid fuels, both coal nowadays as well as biomass in the future, creates the need to develop conversion technologies that meet the requirements of sustainable development.

For these reasons, there is a need to develop effective combustion technologies as well as gasification technologies that use the chemical energy of solids in a sustainable way.

Dr. Andrzej Szlék
Guest Editor

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Published Papers (1 paper)

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Research

16 pages, 4516 KiB  
Article
Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide
by Mateusz Wnukowski and Wojciech Moroń
Energies 2021, 14(21), 7383; https://doi.org/10.3390/en14217383 - 5 Nov 2021
Cited by 4 | Viewed by 1824
Abstract
Warm plasma techniques are considered a promising method of tar removal in biomass-derived syngas. The fate of another problematic syngas impurity—hydrogen sulfide—is studied in this work. It is revealed that processing simulated syngas with a microwave plasma results in hydrogen sulfide conversion. For [...] Read more.
Warm plasma techniques are considered a promising method of tar removal in biomass-derived syngas. The fate of another problematic syngas impurity—hydrogen sulfide—is studied in this work. It is revealed that processing simulated syngas with a microwave plasma results in hydrogen sulfide conversion. For different gas flow rates (20–40 NLPM) and hydrogen sulfide concentrations ranging from 250 ppm to 750 ppm, the conversion rate varies from ca. 26% to 45%. The main sulfur-containing products are carbon disulfide (ca. 30% of total sulfur) and carbonyl sulfide (ca. 8% of total sulfur). Besides them, significantly smaller quantities of sulfates and benzothiophene are also detected. The main components of syngas have a tremendous impact on the fate of hydrogen sulfide. While the presence of carbon monoxide, methane, carbon dioxide, and tar surrogate (toluene) leads to the formation of carbonyl sulfide, carbon disulfide, sulfur dioxide, and benzothiophene, respectively, the abundance of hydrogen results in the recreation of hydrogen sulfide. Consequently, the presence of hydrogen in the simulated syngas is the main factor that determines the low conversion rate of hydrogen sulfide. Conversion of hydrogen sulfide into various sulfur compounds might be problematic in the context of syngas purification and the application of the right technique for sulfur removal. Full article
(This article belongs to the Special Issue Combustion and Gasification of Solid Fuels)
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