LaNi_(0.5)M_(0.5)Al_(11)O_(19+δ)催化剂上CH_4和CO_2重整反应的研究  

Study on reforming reaction of methane and carbon dioxide on LaNi_(0.5)M_(0.5)Al_(11)O_(19+δ) catalysts

作　　者：王君霞[1] 刘延[1] 周广栋[1] 咸漠[1] 李文兴[1] 毕颖丽[1] 甄开吉[1] 

机构地区：[1]吉林大学化学系,吉林长春130023

出　　处：《宁夏大学学报（自然科学版）》2001年第2期147-149,共3页Journal of Ningxia University(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (2 99730 12 )

摘　　要：在LaNiAl11O19+δ的基础上 ,制备了一系列磁铅石型复合氧化物LaNi0 .5M0 .5Al11O19+δ(M =Mn ,Fe ,Cu ,Co)催化剂 ,并用XRD和TPR对其结构和性能进行了表征 .结果表明 ,不同M原子均可同晶取代Ni原子进入催化剂晶格内部 ,此系列催化剂均具有相同的晶体结构和相似的还原稳定性 .在CO2 重整CH4 制合成气反应过程中 ,还原态复合氧化物LaNi0 .5Co0 .5Al11O19+δ表现出良好的催化活性和稳定性 ,并且与还原态复合氧化物LaNiAl11O19+δ催化活性相当 .在相同的反应条件下 ,催化活性并没有因为催化剂中Ni量的减少而降低 ,由此推测 ,对于此反应来说 。A series of hexaaluminates LaNi 0.5M 0.5Al 11O 19+δ based on hexaaluminates LaNiAl 11O 19+δ were prepared, and their chemical and physical properties were investigated by means of XRD and TPR techniques. The results showed that the series of oxides exhibited the same crystal structure and similar reduction stability. Compared to the reduced LaNiAl 11O 19+δ,the reduced LaNi 0.5Co 0.5Al 11O 19+δ also exhibited significant catalytic activities and stability for the reaction of CO 2 reforming of methane to synthesis gas. Under the same reaction conditions,the catalytic activities did not decrease with the decrease in the Ni content in the LaNi 0.5Co 0.5Al 11O 19+δ.As a result, we could propose that only a certain amount of Ni in the catalysts is needed for this reaction.

关 键 词：磁铅石型复合氧化物 甲烷 二氧化碳 重整反应 合成气 催化剂 晶体结构 还原稳定性 

分 类 号：O643.36[理学—物理化学] O623.11[理学—化学]