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采用浸渍法制备一系列以稀土氧化物为载体的NiWP催化剂.在固定床反应装置上考查其在973K～1123K温度范围内CO2重整CH4的催化活性,发现NiWP/Y2O3催化剂催化活性最好,其在1073 K时,CH4和CO2的转化率达到了98％和90％.同时考察了以Y2 O3为载体的Ni,NiW,NiP,WP,NiWP的催化剂在固定床反应装置上在1023 K～1123 K温度范围内CO2重整CH4的催化活性及其稳定性.并通过XRD,H2-TPR等手段对催化剂进行了表征.结果表明,不同催化活性组分对催化剂NiWP/Y2O3有明显的影响,在1073 K时,NiWP/Y2O3的催化活性最好,CH4和CO2的转化率为98％和90％,其次为Ni/Y2O3,其CH4和CO2的转化率为88.5％和77％.同时在1073 K下,NiWP/Y2O3催化剂的稳定性亦优于其他几种催化剂的稳定性,其在10小时后的CH4的转化率为95.1％与10小时前CH4的转化率相差不大.并对积碳后催化剂进行TG-DTG表征,结果表明,不同活性组分催化剂积碳后的积碳量不同,其积碳种类也不尽相同,其中NiWP/Y2O3催化剂的积碳率最少为9.74％,其积碳以丝状碳和石墨碳为主;Ni/Y2O3和NiW/Y2O3的积碳率相差不大,为14.38％和14.63％,而NiP/Y2O3的积碳率为35.6％,这三者的积碳以丝状碳为主.

A series of NiWP/ x catalysts (x =Y2O3,Eu2O3,Gd2O3) were prepared by impregnantion method;their catalytic activity for CH4/CO2 reforming to synthesis gas was examined with a fixed bed reactor.The results show that NiWP/ Y2O3 is the best catalyst for the reforming activity.When the reaction temperature is 1023 K,the conversion rates for CH4 and CO2 are 98％ and 90％,respectively.And the different active ingredient catalysts NiWP/Y2O3 were examined with a fixed bed reator.The catalysts were characterized by XRD,H2-TPR and other means.The results show that the different active ingredients have significant effect on the catalyst NiWP/Y2O3.When the reaction temperature is 1023 K,NiWP/Y2O3 owns the best catalytic activity,the conversion rates for CH4 and CO2 are 98％ and 90％,respectively.The next is Ni/Y2O3,the CH4 and CO2's conversion rates are 88.5％ and 77％,separately.And NiWP/Y2O3 has the best stability:after reaction for ten hours,NiWP/Y2O3's CH4 conversion rate is 95.1％.The carbon deposition catalysts were examined through TG-DTG.The outcome shows that the different active ingredients catalysts NiWP/Y2O3 have different amount of carbon and carbon species:NiWP/Y2O3 has the least carbon amount and its coke rate is 9.74％,and the carbon is in the forms of filamentous and graphite.Ni/Y2O3 and NiW/Y2O3 have no obvious dirrerence in carbon amount,and their coke rates are 14.38％ and 14.63％,respectively.NiP/Y2O3 coke rate is 35.6％.The carbon for Ni/Y2O3,NiW/Y2O3 and NiP/Y2O3 is in the form of filamentous.