CH合成气在连续式步阶反应器上直接合成C含氧化合物的研究毕业设计.doc

CH4-合成气在连续式步阶反应器上直接合成C2+含氧化合物的研究摘 要从CH4-合成气的利用角度来看，CH4合成气本课题组两步梯阶转化工艺其核心思想是首先使CH4在催化剂表面解离，生成表面CH物种；然后再通入CO2(CO)与表面CH物种反应生成含氧化合物。Cu-Co基催化剂，在连续式固定床两步梯阶反应装置NH3-TPD、H2-TPR、BET等对催化剂测试，并结合活性数据和各种表征结果进行了分析。 主要研究结论如下： （1）适宜的中强酸有于CH4-合成气转化合成C2含氧化合物的载体TiO2活性金属和Co分散还原，提高了C-Co/TiO2催化剂的催化 （）催化剂表面上高度分散的CuO微晶颗粒有利于催化加氢和脱氢反应的进行CH4-合成气转化反应负载载体的双金属C-Co催化剂C2+含氧化合物的Cu-Co/TiO2、Cu-Co/Al2O3、Cu-Co/SiO2。 mg·gcat.-1·h-1，选择性为74.62 %。 CH4-合成气转化 关键词：甲烷，合成气，直接C2+含氧化合物，Cu-CoSYNTHESIS OF C2+ OXYGENATES FROM CH4 AND SYNGAS BY A CONTINUOUS STEP-WISE REACTOR ABSTRACT From the perspective of energy-saving emission reduction, clean environment and the utilization of CH4-synthesis gas, CH4-syngas conversion directly synthesis of oxygen-containing organic compounds in low temperature is one of the most challenging topic in research field.Our research group proposed two step ladder conversion process,Its core idea is to first make CH4 in the catalyst surface dissociation,generation of surface CHx species;And CO2 (Co) generation of oxygen containing compounds with the surface CHX species response.On the basis of previous research, we studied the direct synthesis of C2+ oxygenates from the CH4 and synthesis gas by the lights of the new technology, and focused on the catalysts improvement to enhance the catalytic property in this dissertation. Cu-Co Catalysts were prepared by equivoluminal impregnation method. The activity of all the catalysts was evaluated in the fixed bed reaction device with a continuous, stepwise reactor. Then these catalysts were characterized by the techniques of XRD、NH3-TPD、H2-TPR and BET, binding their activity data and a variety of characterization results to analyse the catalyst performances. The main conclusions were as follows： 1) On the Cu-Co bimetallic catalysts with various carriers, the order of C2+ oxygenates yield and selectivity is Cu-Co/TiO2 Cu-Co/Al2O3 Cu-Co/SiO2. (2) The suitable medium acidity and acid strength is beneficial to improving catalytic activity of the ca