Abstract

This study develops a new simulation model by ASPEN Plus for gasification integrated with water-gas shift reactors and product recovery unit for hydrogen production. Timber and wood waste (T&WW) as a lignocellulosic biomass was also considered as the input feedstock to the system. Then, the model is applied to investigate the effect of two agents of air and a mixture of air-steam under different operating conditions of temperature and steam to biomass ratio (SBR). The results reveal that the produced hydrogen through the air-steam gasification is at the highest points for all studied temperatures and it would be maximum (44.37 kmol/hr per 1 ton T&WWs) at 700 °C. The hydrogen production efficiency (HPE) can be also raised, stemming from the growth of H₂. It values 39.2% at SBR = 0.1 that grows to 70% at SBR = 0.9. The optimum SBR lies between 0.7–0.8 that specific mass flow rate of hydrogen would be higher than 0.1 kg_hydrogen/kg_T&WW.

摘要

本研究通过 ASPEN Plus 开发了一种新的气化模拟模型，该模型与水煤气变换反应器和用于制氢的产品回收装置相结合。作为木质纤维素生物质的木材和木材废料 (T&WW) 也被视为系统的输入原料。然后，应用该模型研究了空气和空气-蒸汽混合两种药剂在不同温度和蒸汽生物质比（SBR）运行条件下的影响。结果表明，在所有研究温度下，通过空气-蒸汽气化产生的氢气处于最高点，在 700 °C 时最高（每 1 吨 T&WWs 为 44.37 kmol/hr）。_{由于 H 2}的增长，制氢效率 (HPE) 也可以提高. 它在 SBR = 0.1 时为 39.2%，在 SBR = 0.9 时增长到 70%。最佳 SBR 介于 0.7–0.8 之间，即氢气的比质量流量将高于 0.1 kg_氢气/kg _T&WW。