流化床中CH_4/C_3H_8自热重整制合成气  

Autothermal Reforming of CH_4 and C_3H_8 to Syngas in a Fluidized-Bed Reactor

作　　者：郭建忠[1] 侯昭胤[2] 郑小明[2] 

机构地区：[1]浙江农林大学化学系,浙江临安311300 [2]浙江大学催化研究所,浙江省应用化学重点实验室,浙江杭州310028

出　　处：《催化学报》2010年第9期1115-1121,共7页

基　　金：国家自然科学基金(90610002;Z406142);国家重点基础研究发展计划(973计划;2007CB210207);国家高技术研究发展计划(863计划;2007AA05Z415);浙江省科技厅重点项目(2008C12055);浙江林学院科学发展基金(2008FR052)

摘　　要：在流化床反应器中,考察了Ni/SiO2催化剂上CH4或CH4-C3H8临氧CO2重整(自热重整)制合成气反应性能.结果表明,在CH4-C3H8混合气自热重整反应中,Ni粒径较小催化剂的活性和抗积炭性能较高,CH4和CO2转化率分别达75.5%和72.6%.C3H8比CH4更易解离及被氧化,部分C3H8解离出来的中间产物CHx物种可与吸附H结合为CH4,因而降低了CH4的表观转化率;CHx也可与吸附的CO2物种反应生成H2与CO,从而促进了CO2的转化.The catalytic properties of Ni/SiO2 catalysts with different Ni particle size for the oxy-reforming of methane or methane-propane with CO2 and O2（autothermal reforming） in a fluidized-bed reactor were investigated.The results show that Ni/SiO2 catalysts with smaller Ni particle size exhibit higher catalytic activity and improved resistance to carbon deposition.The conversion of methane and carbon dioxide was 75.5% and 72.6%,respectively,for the methane-propane autothermal reforming reaction.The propane dissociates and is oxidized more easily than methane.The CHx intermediate species from propane dissociation combines with the adsorbed hydrogen to produce methane,which results in a decrease in the apparent conversion of methane.Additionally,H2 and CO are generated by the reaction with adsorbed CO2,which promotes the conversion of the CO2.

关 键 词：甲烷 丙烷 自热重整 合成气 镍 氧化硅 负载型催化剂 

分 类 号：TE665.3[石油与天然气工程—油气加工工程]