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<p>This study presents a biomass chemical looping gasification (BCLG) coupled with biomass steam gasification (BSG) process for hydrogen production, which enhances syngas quality while converting steam into hydrogen. This approach enables simultaneous hydrogen production via both oxygen carrier (OC) catalysis and BSG. Simulations were conducted using Aspen Plus software to investigate the effects of operational parameters such as temperature, pressure, and the OC-to-biomass ratio (OBR) on the BCLG process. The results indicate that as the fuel reactor (FR) temperature increases, the H<sub>2</sub> concentration reaches a peak of 46.40% at 700 ℃, while CO concentration continuously rises. The H<sub>2</sub>/CO ratio significantly decreases, and the lower heating value (LHV) increases, stabilizing above 750 ℃. As the FR pressure increases from 1&#xa0;atm to 15&#xa0;atm, both H<sub>2</sub> and CO concentrations decrease significantly, while CO<sub>2</sub> and CH<sub>4</sub> concentrations increase, leading to a drop in LHV. When OBR is below 0.8, gasification reactions dominate, resulting in higher CO production. As OBR increases to 1.2, OC reactions take over, causing a decrease in CO and H<sub>2</sub> concentrations and an increase in CO<sub>2</sub> concentration. At OBR increases to 1.6, biomass is insufficient to fully react with the OC, and the gas components stabilize. Sensitivity analysis shows that after coupling with BSG, the H<sub>2</sub> concentration significantly increases from 39.05% to 55.56%. At lower OBR, the water-gas shift reaction enhances H<sub>2</sub> production. However, as the steam reactor temperature increases, H<sub>2</sub> concentration initially rises and then declines, primarily due to the enhanced reducibility of the OC.</p>

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Simulation and study of hydrogen production process from biomass chemical looping gasification coupled with biomass steam gasification based on Aspen Plus

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Qianqian Yang,
  • Fang Wang,
  • Ruicai Yang,
  • Guangchao Liu,
  • Pengyu Wei,
  • Guoyan Chen

摘要

This study presents a biomass chemical looping gasification (BCLG) coupled with biomass steam gasification (BSG) process for hydrogen production, which enhances syngas quality while converting steam into hydrogen. This approach enables simultaneous hydrogen production via both oxygen carrier (OC) catalysis and BSG. Simulations were conducted using Aspen Plus software to investigate the effects of operational parameters such as temperature, pressure, and the OC-to-biomass ratio (OBR) on the BCLG process. The results indicate that as the fuel reactor (FR) temperature increases, the H2 concentration reaches a peak of 46.40% at 700 ℃, while CO concentration continuously rises. The H2/CO ratio significantly decreases, and the lower heating value (LHV) increases, stabilizing above 750 ℃. As the FR pressure increases from 1 atm to 15 atm, both H2 and CO concentrations decrease significantly, while CO2 and CH4 concentrations increase, leading to a drop in LHV. When OBR is below 0.8, gasification reactions dominate, resulting in higher CO production. As OBR increases to 1.2, OC reactions take over, causing a decrease in CO and H2 concentrations and an increase in CO2 concentration. At OBR increases to 1.6, biomass is insufficient to fully react with the OC, and the gas components stabilize. Sensitivity analysis shows that after coupling with BSG, the H2 concentration significantly increases from 39.05% to 55.56%. At lower OBR, the water-gas shift reaction enhances H2 production. However, as the steam reactor temperature increases, H2 concentration initially rises and then declines, primarily due to the enhanced reducibility of the OC.