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.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
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
关键词
天然气
二氧化碳
合成气
催化剂
失活
再生
reforming natural gas with carbon dioxide
synthesis gas 9 catalyst deactivation
catalyst reactivation