生物质化学链气化制富氢合成气的研究  

Study on Chemical Looping Gasification of Biomass for Hydrogen-rich Syngas Production

作　　者：王潘磊 徐祖伟[1] 赵海波[1] WANG Panlei;XU Zuwei;ZHAO Haibo(State Key Laboratory of Coal Combustion,Huazhong University of Science&Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学煤燃烧与低碳利用全国重点实验室,武汉430074

出　　处：《工程热物理学报》2024年第12期3953-3961,共9页Journal of Engineering Thermophysics

基　　金：国家重点研发计划(No.2022YFE0135500);国家自然科学基金(No.52025063);湖北省重点研发计划(No.2022BCA087)。

摘　　要：本文通过溶胶凝胶法制备了Ca_(2)Fe_(2)O_(5)氧载体用于生物质化学链气化制备富氢合成气研究。结果表明,相比于生物质常规的热解和水蒸气气化,采用Ca_(2)Fe_(2)O_(5)作为氧载体进行化学链气化时水蒸气和氧载体的协同作用大大提高了H_(2)产率和碳转化率;不同氧载体实验和热力学分析结果对比凸显了Ca_(2)Fe_(2)O_(5)氧载体优异的反应特性;通过对反应工况进行优化得出最佳反应条件为气化温度850℃、水蒸气浓度30%和氧燃比0.2,该工况下H_(2)产率和总气体产率为0.91 m^(3)/kg和1.83 m^(3)/kg,H_(2)/CO比接近3;最后,10次循环实验以及氧载体表征结果表明Ca_(2)Fe_(2)O_(5)氧载体的循环稳定性良好,在10次循环过程保持相对稳定的气体产率,且氧载体晶相和微观形貌并无较大改变。In this paper,Ca_(2)Fe_(2)O_(5) oxygen carrier was prepared by sol-gel method for the produc-tion of hydrogen-rich syngas from chemical looping gasification of biomass.The results show that compared with the conventional pyrolysis and steam gasification of biomass,the synergistic effect of steam and oxygen carrier greatly improves the H_(2) yield and carbon conversion rate when Ca_(2)Fe_(2)O_(5) is used as oxygen carrier.The comparison of different oxygen carrier and thermodynamic analysis highlights the excellent reaction characteristics of Ca_(2)Fe_(2)O_(5) oxygen carrier.By optimizing the reac-tion conditions,the optimum reaction conditions were obtained as follows:gasification temperature 850℃,steam concentration 30%and oxygen-fuel ratio 0.2.Under this condition,the H_(2) yield and total gas yield were 0.91 m^(3)/kg and 1.83 m^(3)/kg,respectively,and the H_(2)/CO ratio was close to 3.Finally,10 cycles of experiments and oxygen carrier characterization results show that the Ca_(2)Fe_(2)O_(5) oxygen carrier has good cycle stability,where the crystal phase and microstructure of the oxygen carrier have almost no change.

关 键 词：化学链气化 氧载体 富氢合成气 

分 类 号：TK123[动力工程及工程热物理—工程热物理]