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Steam Gasification of Torrefied/Carbonized Wheat Straw for H(2)-Enriched Syngas Production and Tar Reduction

Torrefaction/carbonization integrated with steam gasification of agricultural biomass for gas production and tar reduction was not investigated. The aim of this study was to evaluate the influence of the torrefaction/carbonization severity on H(2)-enriched syngas production and tar reduction during...

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Detalles Bibliográficos
Autores principales: Wang, Kejie, Kong, Ge, Zhang, Guanyu, Zhang, Xin, Han, Lujia, Zhang, Xuesong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9518206/
https://www.ncbi.nlm.nih.gov/pubmed/36078192
http://dx.doi.org/10.3390/ijerph191710475
Descripción
Sumario:Torrefaction/carbonization integrated with steam gasification of agricultural biomass for gas production and tar reduction was not investigated. The aim of this study was to evaluate the influence of the torrefaction/carbonization severity on H(2)-enriched syngas production and tar reduction during steam gasification of wheat straw (WS). The torrefaction/carbonization experiments were initially performed at 220–500 °C to examine the effect of pretreated temperature on the fuel properties of torrefied/carbonized WS. Then, the gasification temperature (700–900 °C) was optimized at 900 °C in terms of gas formation behaviors. Afterward, steam gasification of raw and torrefied/carbonized WS feedstocks was conducted. WS carbonized at 500 °C (WS-500) possessed the highest H(2) concentration (54.21 vol%) and syngas purity (85.59%), while the maximum H(2)/CO molar ratio (1.83), high carbon conversion efficiency (90.33 C%) and cold gas efficiency (109.24%) were observed for WS torrefied at 280 °C. Notably, the cumulative gas yield, H(2) yield, and syngas yield respectively reached 102.68 mmol/g, 55.66 mmol/g, and 87.89 mmol/g from steam gasification of WS-500. In addition, the carbonized WS feedstocks, especially WS-500, revealed a lower tar content. Simply put, integrating torrefaction/carbonization with steam gasification provided a novel and effective route to manufacture H(2)-enriched syngas with extremely low tar content from agricultural biomass.