Experimental and Kinetic Studies on Steam Gasification of a Biomass Char

The maximum gasification rate of corn stalk char (CSC) appeared at high conversion range, and its quite different gasification behaviors from other carbonaceous materials are all derived from the catalytic effect of alkali and alkali earth metals (AAEMs), so it is necessary to study the effect of AA...

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Autores principales:	Shengguo Zhao, Liang Ding, Yun Ruan, Bin Bai, Zegang Qiu, Zhiqin Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	biomass char steam gasification kinetic model AAEMs Technology T
Acceso en línea:	https://doaj.org/article/922981eb13d04750af3332234f5966cc
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spelling	oai:doaj.org-article:922981eb13d04750af3332234f5966cc2021-11-11T15:59:37ZExperimental and Kinetic Studies on Steam Gasification of a Biomass Char10.3390/en142172291996-1073https://doaj.org/article/922981eb13d04750af3332234f5966cc2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7229https://doaj.org/toc/1996-1073The maximum gasification rate of corn stalk char (CSC) appeared at high conversion range, and its quite different gasification behaviors from other carbonaceous materials are all derived from the catalytic effect of alkali and alkali earth metals (AAEMs), so it is necessary to study the effect of AAEMs and gasification kinetics of such biomass char. However, there are few systematic discussions about this effect and kinetic modeling. Thus, in this study, CSC samples were prepared in a fast pyrolysis fixed-bed reactor, and its gasification experiments were conducted on a pressurized magnetic suspension balance at various total pressures (0.1–0.7 MPa), steam concentrations (10–70 vol.%) and temperatures (725–900 °C). Moreover, a water-leached CSC (H<sub>2</sub>O-CSC) was also prepared to evaluate the impact of AAEMs on the gasification performance of CSC, and some well-known models were adopted to describe the gasification behaviors. On the basis of these results, the effect of primary AAEMs on the gasification behaviors of CSC and gasification kinetic modeling were obtained. Results showed total pressure had no obvious influence on the gasification rate of CSC, and the reaction order varied at 0.43–0.55 with respect to steam partial pressures. In addition, the modified random pore model (MRPM) and Langmuir–Hinshelwood (L-H) model were satisfactorily applied to predict the gasification behaviors of CSC. The catalytic effect of AAEMs on CSC gasification was weakened due to water-leaching treatment. A random pore model (RPM) could describe the gasification behavior of H<sub>2</sub>O-CSC well, followed by grain model (GM) and volumetric model (VM).Shengguo ZhaoLiang DingYun RuanBin BaiZegang QiuZhiqin LiMDPI AGarticlebiomass charsteam gasificationkinetic modelAAEMsTechnologyTENEnergies, Vol 14, Iss 7229, p 7229 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biomass char steam gasification kinetic model AAEMs Technology T
spellingShingle	biomass char steam gasification kinetic model AAEMs Technology T Shengguo Zhao Liang Ding Yun Ruan Bin Bai Zegang Qiu Zhiqin Li Experimental and Kinetic Studies on Steam Gasification of a Biomass Char
description	The maximum gasification rate of corn stalk char (CSC) appeared at high conversion range, and its quite different gasification behaviors from other carbonaceous materials are all derived from the catalytic effect of alkali and alkali earth metals (AAEMs), so it is necessary to study the effect of AAEMs and gasification kinetics of such biomass char. However, there are few systematic discussions about this effect and kinetic modeling. Thus, in this study, CSC samples were prepared in a fast pyrolysis fixed-bed reactor, and its gasification experiments were conducted on a pressurized magnetic suspension balance at various total pressures (0.1–0.7 MPa), steam concentrations (10–70 vol.%) and temperatures (725–900 °C). Moreover, a water-leached CSC (H<sub>2</sub>O-CSC) was also prepared to evaluate the impact of AAEMs on the gasification performance of CSC, and some well-known models were adopted to describe the gasification behaviors. On the basis of these results, the effect of primary AAEMs on the gasification behaviors of CSC and gasification kinetic modeling were obtained. Results showed total pressure had no obvious influence on the gasification rate of CSC, and the reaction order varied at 0.43–0.55 with respect to steam partial pressures. In addition, the modified random pore model (MRPM) and Langmuir–Hinshelwood (L-H) model were satisfactorily applied to predict the gasification behaviors of CSC. The catalytic effect of AAEMs on CSC gasification was weakened due to water-leaching treatment. A random pore model (RPM) could describe the gasification behavior of H<sub>2</sub>O-CSC well, followed by grain model (GM) and volumetric model (VM).
format	article
author	Shengguo Zhao Liang Ding Yun Ruan Bin Bai Zegang Qiu Zhiqin Li
author_facet	Shengguo Zhao Liang Ding Yun Ruan Bin Bai Zegang Qiu Zhiqin Li
author_sort	Shengguo Zhao
title	Experimental and Kinetic Studies on Steam Gasification of a Biomass Char
title_short	Experimental and Kinetic Studies on Steam Gasification of a Biomass Char
title_full	Experimental and Kinetic Studies on Steam Gasification of a Biomass Char
title_fullStr	Experimental and Kinetic Studies on Steam Gasification of a Biomass Char
title_full_unstemmed	Experimental and Kinetic Studies on Steam Gasification of a Biomass Char
title_sort	experimental and kinetic studies on steam gasification of a biomass char
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/922981eb13d04750af3332234f5966cc
work_keys_str_mv	AT shengguozhao experimentalandkineticstudiesonsteamgasificationofabiomasschar AT liangding experimentalandkineticstudiesonsteamgasificationofabiomasschar AT yunruan experimentalandkineticstudiesonsteamgasificationofabiomasschar AT binbai experimentalandkineticstudiesonsteamgasificationofabiomasschar AT zegangqiu experimentalandkineticstudiesonsteamgasificationofabiomasschar AT zhiqinli experimentalandkineticstudiesonsteamgasificationofabiomasschar
_version_	1718432427904335872

Experimental and Kinetic Studies on Steam Gasification of a Biomass Char

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