Fe2O3/Al2O3氧载体化学链制氢联合甲烷干重整制备氢气和合成气  

Syngas and Hydrogen Co-production on Fe2O3/Al2O3 Oxygen Carrier via Chemical Looping Hydrogen Generation Process With Methane Dry Reforming

作　　者：朱珉 陈时熠 马士伟 胡骏 向文国 ZHU Min;CHEN Shi-Yi;MA Shi-Wei;HU Jun;XIANG Wen-Guo(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China)

机构地区：[1]东南大学能源与环境学院能源热转换及其过程测控教育部重点实验室

出　　处：《工程热物理学报》2019年第10期2447-2453,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51606038);江苏省科技计划青年基金项目(No.BK20160672)

摘　　要：化学链制氢联合甲烷干重整由还原、甲烷干重整、蒸汽氧化和空气氧化四个反应器组成,是一种连续的CO2回收、氢气和合成气制备的新方法。在小型流化床实验台中,研究温度和CO2/CH4比对Fe2O3/Al2O3载氧体甲烷干重整、制氢和循环特性的影响。结果显示:还原后的Fe2O3/Al2O3载氧体具有优秀的甲烷干重整催化特性。CO2/CH4比为1时,甲烷干重整存在轻微的积碳,制氢纯度超过99%。十次循环后,载氧体发现轻微烧结,甲烷转化率保持稳定,二氧化转化率呈缓慢下降的趋势。A novel chemical looping process was introduced by combining chemical looping hydrogen generation and dry reforming of methane(CLHD) on a cost-effective iron-based oxygen carrier to produce high-purity syngas and hydrogen simultaneously.Four different reactors were contained in this proposed chemical looping process,i.e.reduction reactor,methane dry reforming reactor,steam oxidation reactor and air oxidation reactor.In this study,Fe2O3/Al2O3 oxygen carrier was synthesized by a coprecipitation route,and the influences of the CO2/CH4 ratio on the performance of methane dry reforming,hydrogen purity and redox stability were investigated in a fluidized bed reactor.It can be seen from the experimental results that the reduced Fe2O3/Al2O3 oxygen carrier shows a good catalytic activity on dry reforming of methane.Since the reaction temperature was 900℃ and the ratio of CO2/CH4 was 1,slightly deposited carbon formed in the dry reforming period,which created the purity of hydrogen exceeds 99% in the next steam oxidation period.After 10 cycles,slight sintering of oxygen carrier was observed.The methane conversion kept stable along with cycles while the conversion of carbon dioxide decreased slowly.

关 键 词：干重整 甲烷 化学链 氢气 

分 类 号：TE646[石油与天然气工程—油气加工工程]