天然气和二氧化碳转化制合成气的研究──Ⅱ．催化剂失活与再生  

Studies of reforming natural gas with carbon dioxide to produce synthesis gas ──Ⅱ. Catalyst deactivation and reactivation

作　　者：范业梅[1] 徐恒泳[1] 史克英[1] 商永臣 徐国林[1] 陈恒荣[1] 熊国兴[1] 周佩珩[1] 郭伟松 黄仁才[1] 

机构地区：[1]哈尔滨师范大学化学系,中国科学院大连化学物理研究所,上海石油化工总厂化工二厂研究所

出　　处：《天然气化工—C1化学与化工》1995年第2期6-10,共5页Natural Gas Chemical Industry

基　　金：国家自然科学基金;国家催化基础研究重点实验室资助

摘　　要：采用ＸＲＤ，ＸＰＳ技术，配合比表面、孔结构测定和催化微反技术，研究了天然气和ＣＯ２转化制合成气催化剂失活机制和再生条件。发现催化剂失活主要是由于活性中心Ｎｉ０聚集并形成晶相，因而降低了催化剂表面活性中心数，其次是由于部分活性中心形成难还原的ＮｉＡ１２Ｏ４物种和催化剂比表面降低。找到了一种催化剂再生的最佳条件，通过使用晶相分散剂Ｂ可以使催化剂恢复到新鲜催化剂的活性。The deactivated mechanism and the reactivated conditions for the catalysts used in reforming natural gas with carbon dioxide to produce syngas have been studied by using XRD, TPR, XPS techniques, together with determinations of specific Surface area and pore structure, and the micro catalytic reactor. It was found that the main reason of catalytic deactivation is the formation of NiOcrystal thus reducing the number of activity site on the catalyst Surfaces, and the secondary reason is the decrease of surface area and the formation of NiA12O4. on a part of active sites. The optimum conditions for catalyst reactivation were found. The activity can be renewed to the fresh one by the treatment with crystal disperser B.

关 键 词：天然气 二氧化碳 合成气 催化剂 失活 再生 

分 类 号：TE665.3[石油与天然气工程—油气加工工程] O643.361[理学—物理化学]