In this study, two thermochemical processes, namely steam gasification and supercritical water gasification (SCWG), were comparatively studied to produce hydrogen from food wastes containing about 90% water. The SCWG experiments were performed at 400 and 450 °C in presence of catalyst (Trona, K₂CO₃ and seaweed ash). The maximum hydrogen yield was obtained at 450 °C in presence of K₂CO₃ catalyst. In second process, hydrothermal carbonization was used to convert food wastes into a high-quality solid fuel (hydrochar) that was further gasified in a dual-bed reactor in presence of steam. The steam gasification of hydrochar was carried out with and without catalysts (iron−ceria catalyst and dolomite). The maximum hydrogen yield obtained from steam gasification process was 28.08 mmol/g dry waste, about 7.7 times of that from SCWG. This study proposed a new concept for hydrogen production from wet biomass, combination of hydrothermal carbonization following steam gasification.

在这项研究中，比较研究了两个热化学过程，即蒸汽气化和超临界水气化（SCWG），以从含水量约90％的食物垃圾中产生氢气。SCWG实验是在催化剂（Trona，K ₂ CO ₃和海藻灰）存在下于400和450°C进行的。在K ₂ CO ₃存在下，在450°C时可获得最大的氢气产率催化剂。在第二个过程中，使用水热碳化法将食物残渣转化为高质量的固体燃料（氢碳），然后在双反应器中在有蒸汽的情况下进一步气化。使用或不使用催化剂（二氧化铈催化剂和白云石）进行水蒸气的蒸汽气化。蒸汽气化过程获得的最大氢气产率为28.08 mmol / g干废料，约为SCWG的7.7倍。这项研究提出了一种从湿生物质中制氢的新概念，并结合了蒸汽气化后的水热碳化。