Investigation of Biomass Gasification Potential in Syngas Production: Characteristics of Dried Biomass Gasification Using Steam as the Gasification Agent

Abstract

This article assesses the gasification behavior of sawdust using steam as the gasification agent. To do this, a comprehensive model of biomass gasification consisting of four main processes (biomass dehydration, biomass devolatilization, tar combustion, and char gasification) was developed using an Aspen Plus simulator. Two gasification processes were studied: steam-gasification with primary tar combustion (SIM I) and steam-gasification with no pretreatment (SIM II). The effects of the gasification temperature (650−800 °C) and the steam-to-biomass ratio, S/B (1.1−1.8), on the produced gas composition, gas yield, tar yield, the higher heating value of the syngas (HHV gas ), H 2 /CO, carbon conversion efficiency (CCE), and cold gas efficiency (CGE) were investigated. It was found that the gasification strategy had little effect on the CCE but had a significant effect on the produced gas composition and CGE. During steam-gasification with primary tar combustion (SIM I), HHV gas and H 2 /CO showed higher values, while the tar yield showed lower values. The simulation results also confirmed an insignificant effect of the gasification temperature in the range of 650−800 °C on HHV gas . Regardless of the gasification strategy, it was found that steam-gasification of sawdust achieved the acceptable level of H 2 /CO and HHV gas at simulated conditions and can be considered as an alternative route for the Fischer−Tropsch synthesis.

A Scientometric Review: Biomass Gasification Study from 2006 to 2020

“…Of note is that the life-cycle assessment can be considered as an evaluation of the environmental benefits of biomass gasification. Over recent years, the technology of biomass gasification polygeneration to produce three-phase products received growing attention due to the high efficiency of biomass utilization. − Bio-oil, biochar, and noncondensable gas are significant products for further value-added utilization in this technology. , The noncondensable gases (e.g., CO, CO 2 , and H 2 ) can be used as boiler fuel and partially replace natural gas. Biochar has a wide range of applications as solid fuel, activated carbon intermediate, and carbon-based compound fertilizer.…”

State of the Art and Perspectives in Catalytic Conversion Mechanism of Biomass to Bio-aromatics

“…Bio-gas (CO and H 2 ), derived from biomass gasification, can be converted into high-value-added bio-aromatics. , According to the variation of intermediates, the production of bio-aromatics from bio-gas can be categorized as an alkene route and an oxygenate (methanol/dimethyl ether) route, which is generally attributed to the biomass Fischer–Tropsch synthesis technology and biomass methanol/dimethyl to bio-aromatics technology, respectively. − …”

Effect of Woody Biomass Gasification Process Conditions on the Composition of the Producer Gas

“…An Aspen plus model of sawdust gasification at temperatures of 650-800 • C observed an increase in CO and a decrease in CO 2 and CH 4 , due to the higher production of CO through the water-gas shift reaction and the tar cracking reaction. A decrease in the tar yield and an increase in the yield of producer gas was also observed [17]. The latest research has also focused on the effect of biomass composition in soot formation [18], the effect of temperature on soot formation [19], modeling the formation of soot, and the positive effect of higher gasification temperatures on char conversion [20].…”