固体热载体法生物质催化气化制氢.pdfVIP

固体热载体法生物质催化气化制氢 刘金刚，魏立纲，徐绍平，张红岗，刘淑琴，刘长厚 （大连理工大学化学工艺系精细化工国家重点实验室，116012） (论文范围：2.1 绿色与可持续发展化学工艺与工程) 摘要：提出一个新的生物质催化气化制氢工艺，该工艺联合生物质的催化气化和催化剂的再生并载热循环于 一体，生物质在移动床中催化气化，然后催化剂进入提升管中烧炭再生，并携热循环进入气化器。该工艺在 提高能源转化效率，解决系统的能量来源的同时，进一步提高了氢产率降低了焦油含量。本实验以白松为生 物质进行了该工艺下的水蒸气催化气化制取富氢气体的初步研究。讨论了水蒸气/生物质比（S/B）对气化结 果的影响，同时也比较了煅烧橄榄石与硅砂的催化性能。结果表明;在实验研究的条件范围内，当反应温度为 800℃时，水蒸气的加入有利于氢气含量的增加，最高达50.6%，且S/B有最佳值0.6 。煅烧橄榄石较硅砂有明 显的催化活性，且抗磨损性能较强，实验过程中无失活现象发生。 关键词：生物质；固体热载体；催化气化；制氢 中图分类号：TK6 Hydrogen production from catalytic gasification of biomass with solid heat carrier LIU Jingang, WEI Ligang, XU Shaoping, ZHANG Honggang, LIU Shuqin, LIU Changhou (State Key Laboratory of Fine Chemicals, Department of Chemical Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China) Abstract ：A new process of catalytic gasification of biomass for Hydrogen-rich gas had been proposed. The gasifier is composed of two zones, a gasification zone and a combustion zone. A circulation loop of bed material is created between these two zones, but the product gas and flue gas remain separated. The circulating bed material acts as heat carrier together with some charcoal circulates from the gasification zone to the combustion zone. The exothermic reaction in the combustion zone provides the energy for the endothermic gasification with steam. In this process, bed material is not only heat-carrier, but also plays a role of catalyst. The moving-bed as a gasifier with the addition of catalyst will favor to tar cracking and reforming reaction for reducing tar yield and an increase of H2 production. In this study the steam gasification of pine sawdust with olivine as catalytic solid heat carrier was carried out in a bench scale tes