摘要
在透氧膜反应器内对比分析了不加催化剂和添加1g 9%Ni/γ-Al_2O_3催化剂的甲烷重整反应实验.结果表明,不加催化剂时甲烷相对较惰性;而在催化剂的作用下,甲烷重整活性得到了较大提高,但但是催化剂易积碳.推测甲烷重整反应路径如下:甲烷在催化剂活性组分上发生裂解,产生氢和碳;生成的氢与膜表面的氧反应生成H_2O,从而使得膜表面侧氧分压下降,透氧量增大.通过设计不同Ni含量NiO/MgO催化剂下的甲烷裂解和甲烷重整反应实验,验证了以上的反应机理模型.
Reforming reaction of methane was carried out in an oxygen permeation membrane reactor, and fed with methane and Ar. A comparative analysis of the oxygen permeation performance under the condition of CH4 diluted by Ar with i g 9% Ni/γ-AL2o3 catalyst and without catalyst was performed to investigate the reaction pathways. According to the results, the reaction pathways are deduced. The dissociation of CHa on catalyst first formed surface C species and H2. The producted H2 is then reacted with oxygen diffused or spilt over catalyst from membrane to form H2O, causing the oxygen partial pressure to decrease, and the flux of oxygen to increase. This paper further shows the pathways of CHa dissociation and H2 oxidation, through catalytic partial oxidation of methane over NiO/MgO catalysts with different Ni contents in an oxygen permeation membrane reactor.
出处
《上海大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第6期572-578,共7页
Journal of Shanghai University:Natural Science Edition
基金
国家自然科学基金资助项目(51304082)
江苏省自然科学基金资助项目(BK20130462)
江苏省高校自然科学基金资助项目(12KJB450001)
江苏科技大学人才引进基金资助项目(35271103)
江苏科技大学青年教师科研基金资助项目(112110108)
关键词
透氧膜反应器
甲烷
重整反应
反应途径
oxygen permeation membrane reactor
methane
reforming reaction
reaction pathway
