Na2WO4/Mn/SiO2 Catalyst Pellets for Upgrading H2S-Containing Biogas via the Oxidative Coupling of Methane

Biogas is a promising renewable energy source; however, it needs to be upgraded to increase its low calorific value. In this study, oxidative coupling of methane (OCM) was selected to convert it to a higher fuel standard. Prior to establishing the scaled-up OCM process, the effect of organic/inorgan...

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Autores principales:	Sangseo Gu, Jae-Wook Choi, Dong Jin Suh, Chun-Jae Yoo, Jungkyu Choi, Jeong-Myeong Ha
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	heterogeneous catalysts biogas conversion tube-shaped catalyst pellets high sulfur-compound resistance Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/161c52ee4ec64cdcb378e12fc7b6f729
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spelling	oai:doaj.org-article:161c52ee4ec64cdcb378e12fc7b6f7292021-11-25T17:05:38ZNa<sub>2</sub>WO<sub>4</sub>/Mn/SiO<sub>2</sub> Catalyst Pellets for Upgrading H<sub>2</sub>S-Containing Biogas via the Oxidative Coupling of Methane10.3390/catal111113012073-4344https://doaj.org/article/161c52ee4ec64cdcb378e12fc7b6f7292021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1301https://doaj.org/toc/2073-4344Biogas is a promising renewable energy source; however, it needs to be upgraded to increase its low calorific value. In this study, oxidative coupling of methane (OCM) was selected to convert it to a higher fuel standard. Prior to establishing the scaled-up OCM process, the effect of organic/inorganic binders on catalytic activity was examined. The selection of the binders and composition of the catalyst pellet influenced the pore structure, fracture strength, and catalytic activity of the catalyst pellets. It was also observed that the O<sub>2</sub> supply from the inorganic binder is a key factor in determining catalytic activity, based on which the composition of the catalyst pellets was optimized. The higher heating value increased from 39.9 (CH<sub>4</sub>, Wobbe index = 53.5 MJ/Nm<sup>3</sup>) to 41.0 MJ/Nm<sup>3</sup> (OCM product mixture, Wobbe index = 54.2 MJ/Nm<sup>3</sup>), achieving the fuel standard prescribed in many countries (Wobbe index = 45.5–55.0 MJ/Nm<sup>3</sup>). The reaction parameters (temperature, gas hourly space velocity, size of the reaction system, and the CH<sub>4</sub>/O<sub>2</sub> ratio) were also optimized, followed by a sensitivity analysis. Furthermore, the catalyst was stable for a long-term (100 h) operation under the optimized conditions.Sangseo GuJae-Wook ChoiDong Jin SuhChun-Jae YooJungkyu ChoiJeong-Myeong HaMDPI AGarticleheterogeneous catalystsbiogas conversiontube-shaped catalyst pelletshigh sulfur-compound resistanceChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1301, p 1301 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	heterogeneous catalysts biogas conversion tube-shaped catalyst pellets high sulfur-compound resistance Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	heterogeneous catalysts biogas conversion tube-shaped catalyst pellets high sulfur-compound resistance Chemical technology TP1-1185 Chemistry QD1-999 Sangseo Gu Jae-Wook Choi Dong Jin Suh Chun-Jae Yoo Jungkyu Choi Jeong-Myeong Ha Na<sub>2</sub>WO<sub>4</sub>/Mn/SiO<sub>2</sub> Catalyst Pellets for Upgrading H<sub>2</sub>S-Containing Biogas via the Oxidative Coupling of Methane
description	Biogas is a promising renewable energy source; however, it needs to be upgraded to increase its low calorific value. In this study, oxidative coupling of methane (OCM) was selected to convert it to a higher fuel standard. Prior to establishing the scaled-up OCM process, the effect of organic/inorganic binders on catalytic activity was examined. The selection of the binders and composition of the catalyst pellet influenced the pore structure, fracture strength, and catalytic activity of the catalyst pellets. It was also observed that the O<sub>2</sub> supply from the inorganic binder is a key factor in determining catalytic activity, based on which the composition of the catalyst pellets was optimized. The higher heating value increased from 39.9 (CH<sub>4</sub>, Wobbe index = 53.5 MJ/Nm<sup>3</sup>) to 41.0 MJ/Nm<sup>3</sup> (OCM product mixture, Wobbe index = 54.2 MJ/Nm<sup>3</sup>), achieving the fuel standard prescribed in many countries (Wobbe index = 45.5–55.0 MJ/Nm<sup>3</sup>). The reaction parameters (temperature, gas hourly space velocity, size of the reaction system, and the CH<sub>4</sub>/O<sub>2</sub> ratio) were also optimized, followed by a sensitivity analysis. Furthermore, the catalyst was stable for a long-term (100 h) operation under the optimized conditions.
format	article
author	Sangseo Gu Jae-Wook Choi Dong Jin Suh Chun-Jae Yoo Jungkyu Choi Jeong-Myeong Ha
author_facet	Sangseo Gu Jae-Wook Choi Dong Jin Suh Chun-Jae Yoo Jungkyu Choi Jeong-Myeong Ha
author_sort	Sangseo Gu
title	Na<sub>2</sub>WO<sub>4</sub>/Mn/SiO<sub>2</sub> Catalyst Pellets for Upgrading H<sub>2</sub>S-Containing Biogas via the Oxidative Coupling of Methane
title_short	Na<sub>2</sub>WO<sub>4</sub>/Mn/SiO<sub>2</sub> Catalyst Pellets for Upgrading H<sub>2</sub>S-Containing Biogas via the Oxidative Coupling of Methane
title_full	Na<sub>2</sub>WO<sub>4</sub>/Mn/SiO<sub>2</sub> Catalyst Pellets for Upgrading H<sub>2</sub>S-Containing Biogas via the Oxidative Coupling of Methane
title_fullStr	Na<sub>2</sub>WO<sub>4</sub>/Mn/SiO<sub>2</sub> Catalyst Pellets for Upgrading H<sub>2</sub>S-Containing Biogas via the Oxidative Coupling of Methane
title_full_unstemmed	Na<sub>2</sub>WO<sub>4</sub>/Mn/SiO<sub>2</sub> Catalyst Pellets for Upgrading H<sub>2</sub>S-Containing Biogas via the Oxidative Coupling of Methane
title_sort	na<sub>2</sub>wo<sub>4</sub>/mn/sio<sub>2</sub> catalyst pellets for upgrading h<sub>2</sub>s-containing biogas via the oxidative coupling of methane
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/161c52ee4ec64cdcb378e12fc7b6f729
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Na<sub>2</sub>WO<sub>4</sub>/Mn/SiO<sub>2</sub> Catalyst Pellets for Upgrading H<sub>2</sub>S-Containing Biogas via the Oxidative Coupling of Methane

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