Department of Chemical and Biochemical Engineering, Western University, London, Ontario, Canada.
CanmetMATERIALS, Natural Resources Canada, Hamilton, Ontario, Canada.
Bioresour Technol. 2024 Jan;391(Pt A):129923. doi: 10.1016/j.biortech.2023.129923. Epub 2023 Oct 28.
This study compares batch and continuous supercritical water gasification (SCWG) processes for green hydrogen production from biomass. It offers insights for optimizing processes, enhancing yields, quality, and energy efficiency, assessing scale-up feasibility, and supporting techno-economic analyses. Glucose, glycerol, and black liquor were SCWG-treated at 500 °C with KCO catalyst in a self-built continuous-flow reactor (150 g/h) and a batch reactor (75 mL). Comparisons primarily focused on gas product yields. Batch reactors outperformed continuous-flow reactors in hydrogen (glucose: 1.53 to 0.9 mmol/g, glycerol: 7.22 to 1.14 mmol/g, black liquor: 2.88 to 1.74 mmol/g) and total gas yields due to differences in reaction time and heating behavior. Temperature effects on continuous operation (450-600 °C) were studied, with glycerol showing the highest hydrogen yield increase (from 1.21 to 4.30 mmol/g). The study discusses the applicability of both reactors for biomass SCWG processes and their implications for sustainable green hydrogen production from renewable feedstocks.
本研究比较了批处理和连续超临界水气化（SCWG）工艺从生物质生产绿色氢气。它为优化工艺、提高产量、质量和能源效率、评估放大可行性以及支持技术经济分析提供了见解。在 500°C 下，使用 KCO 催化剂，在自建的连续流反应器（150g/h）和间歇式反应器（75mL）中对葡萄糖、甘油和黑液进行了 SCWG 处理。比较主要集中在气体产物的产率上。由于反应时间和加热行为的差异，间歇式反应器在氢气（葡萄糖：1.53 至 0.9mmol/g，甘油：7.22 至 1.14mmol/g，黑液：2.88 至 1.74mmol/g）和总气体产率方面优于连续流反应器。还研究了连续操作（450-600°C）的温度影响，甘油的氢气产率增加最大（从 1.21 增加到 4.30mmol/g）。该研究讨论了两种反应器在生物质 SCWG 工艺中的适用性及其对可再生原料可持续绿色制氢的意义。
