Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide

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....

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Autores principales:	Mateusz Wnukowski, Wojciech Moroń
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	biomass gasification microwave plasma sulfur compounds Technology T
Acceso en línea:	https://doaj.org/article/f4086aff3696459b851bbc2c724ccd3b
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spelling	oai:doaj.org-article:f4086aff3696459b851bbc2c724ccd3b2021-11-11T16:05:43ZWarm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide10.3390/en142173831996-1073https://doaj.org/article/f4086aff3696459b851bbc2c724ccd3b2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7383https://doaj.org/toc/1996-1073Warm 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.Mateusz WnukowskiWojciech MorońMDPI AGarticlebiomass gasificationmicrowave plasmasulfur compoundsTechnologyTENEnergies, Vol 14, Iss 7383, p 7383 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biomass gasification microwave plasma sulfur compounds Technology T
spellingShingle	biomass gasification microwave plasma sulfur compounds Technology T Mateusz Wnukowski Wojciech Moroń Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide
description	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.
format	article
author	Mateusz Wnukowski Wojciech Moroń
author_facet	Mateusz Wnukowski Wojciech Moroń
author_sort	Mateusz Wnukowski
title	Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide
title_short	Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide
title_full	Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide
title_fullStr	Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide
title_full_unstemmed	Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide
title_sort	warm plasma application in tar conversion and syngas valorization: the fate of hydrogen sulfide
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f4086aff3696459b851bbc2c724ccd3b
work_keys_str_mv	AT mateuszwnukowski warmplasmaapplicationintarconversionandsyngasvalorizationthefateofhydrogensulfide AT wojciechmoron warmplasmaapplicationintarconversionandsyngasvalorizationthefateofhydrogensulfide
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Warm Plasma Application in Tar Conversion and Syngas Valorization: The Fate of Hydrogen Sulfide

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