Supercritical water gasification (SCWG) is a promising technology for converting high moisture biomass into valuable gas products. In this study, SCWG of fruit pulp was carried out in a batch reactor in the presence of KOH catalyst. The effect of reaction parameters such as temperature (400–600 °C), reaction time (30–180 min), biomass ratio (2.5–10%, wt. biomass/wt. water) and KOH ratio (0–30%, wt. catalyst/wt. biomass) were investigated in order to determine the suitable reaction conditions for maximizing H₂ yield. The maximum H₂ yield (32.1 mol/kg biomass) was achieved at 600 °C, 30 min, 2.5% biomass ratio and 10% KOH loading. The experimental results indicated that KOH could promote biomass decomposition and increase the amount of gas products via the water-gas shift reaction (WGSR) by intermediate formation of salts and suppressing the char and tar formation. KOH also played a sufficient role in capturing CO₂ at high temperatures, proceeding the WGSR equilibrium reaction towards the products resulting in the production of more hydrogen.

超临界水气化 (SCWG) 是一种将高水分生物质转化为有价值的气体产品的有前途的技术。在本研究中，果肉的 SCWG 在间歇式反应器中在 KOH 催化剂存在下进行。反应参数的影响，如温度（400-600 °C）、反应时间（30-180 分钟）、生物质比（2.5-10%，wt.生物质/wt.水）和 KOH 比（0-30%，研究重量催化剂/重量生物质)以确定用于最大化H ₂产率的合适反应条件。最大 H ₂在 600 °C、30 分钟、2.5% 的生物质比率和 10% 的 KOH 负载下实现了产量（32.1 mol/kg 生物质）。实验结果表明，KOH 可以通过水煤气变换反应 (WGSR) 通过中间形成盐和抑制炭和焦油的形成来促进生物质分解并增加气体产物的数量。KOH在高温下捕获 CO ₂方面也发挥了足够的作用，使 WGSR 平衡反应向产物进行，从而产生更多的氢气。