氧化钙对生物质在超临界水中气化制氢的影响

Effect of CaO on Hydrogen Production by Vaporization From Biomass in Supercritical Water

利用自建的一套间歇式超临界生物质气化实验装置,在水的近临界态和超临界态,以葡萄糖为生物质模型化合物,以制取氢气为目的进行实验研究。选用氧化钙为二氧化碳脱除剂,对比在添加氧化钙前后,反应温度、停留时间和n(Ca)/n(C)等因素对实验效果的影响。得出了新的超临界生物质气化制氢最佳工艺条件:温度在480-530℃,压力在临界压力以上,葡萄糖质量分数在2.5%-5.0%,反应停留时间在3-5 min,n(Ca)/n(C)在0.45-0.52,H2质量分数可以达到67.5%.

Experiments for hydrogen production were carried out in subcritical and supercritical water in a batch--type reactor biomass set up by ourselves. Glucose was used as a model compound, and CaO was used as CO2 remover in experiments. The effects of temperature, residence time and n（Ca）/n（C） on glucose reactions with and without CaO were examined by comparison and the optimal process for hydrogen production from biomass was also suggested. Under the condition of 480- 530 ℃, above critical pressure, 2.5%-5.0% mass fraction of glucose, 3-5 min resident time, n（Ca）/n（C） of 0.45-0.52 , the mass fraction of hydrogen is up to 67.5%.