摘要
采用甲烷自热重整的详细反应机理,通过数值模拟的方法研究了恒壁温、微型直通道内的CH4、O2、H2O镍基催化剂上的自热重整反应。重点分析了混合物组分及质量流量对自热重整产氢暂态特性的影响。结果表明,在较高温度下,微型反应器出口H2产量达到最大值所需的时间受混合气质量流量影响较大,而受混合物组分影响很小;氢气产量达到稳定所需的时间随H2O、CH4摩尔比的增大而缩短,随O2/CH4摩尔比的增大而增长。CH4/O2/H2 O摩尔比为1∶0.5∶3.5时,氢气体积分数可在90 ms时稳定于54%。
By adopting the detailed reaction mechanism governing the methane self-heat reforming and through using a numerical simulation method,studied was the self-heat reforming reaction of CH4/O2/H2O Ni-based catalytic agent in straight microchannels.The influence of the constituents of the mixture and the mass flow rate on the self-heat reforming hydrogen-production transient characteristics was mainly analyzed.The research results show that at a relatively high temperature,the time required for attaining a maximal H2 production capacity at the outlet of the miniature reactor is substantially influenced by the mass flow rate of the gas mixture but influenced relatively little by the constituents of the mixture.The time required for attaining a stable hydrogen production capacity is shortened with an increase of the H2O/CH4 mol ratio and extended with an increase of the O2/CH4 mol ratio.When the CH4/O2/H2O mol ratio is 1∶0.5∶3.5,the hydrogen volumetric fraction can be stabilized at 54% in a shortest time periof of 90 ms.
出处
《热能动力工程》
CAS
CSCD
北大核心
2012年第1期112-116,141,共5页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金资助项目(50906103)
关键词
微通道
甲烷
自热重整
暂态特性
microchannel,methane,self-heat reforming,transient characteristics
作者简介
张力（1956-），男，重庆人，重庆大学教授．
