带氧分布器的固定床反应器中甲烷-空气-水-二氧化碳制合成气  

Tri-reformin g of methane with air, steam and carbon dioxide to synthesis gas in a fixed-bed reactor with an oxygen distributor

作　　者：刘淑红[1] 李文钊[1] 王玉忠[1] 徐恒泳[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《天然气化工—C1化学与化工》2008年第3期13-18,共6页Natural Gas Chemical Industry

基　　金：国家重点基础研究发展计划(973计划)项目(2005cb221401)

摘　　要：在带氧分布器的固定床反应器(FR-OD)中进行了Ni基催化剂上CH4-air-H2O-CO2三重整制合成气的研究。在分氧比为80%的条件下,考察了反应条件(压力、炉温、空速以及原料气CO2/CH4体积比)对催化剂床层温度分布和反应性能的影响,并进行了200h的寿命实验。结果表明,在压力为0.8MPa,出口温度为850℃,GHSV为13800h-1,原料气组成为V(CH4)/V(air)/V(H2O)/V(CO2)=1/2.4/0.8/0.4,分氧比为80%的条件下,催化剂床层入口处未出现热点,连续运行200h期间催化剂活性未见下降,以上结果初步表明采用氧分布器后的Ni基催化剂上可以较安全地进行甲烷三重整制合成气的操作。Tri-reforming of CH4 with air, H2O and CO2 to syn thesis gas employing Ni-based catalyst was studied in a fixed-bed reactor with an O2-distributor （FR-OD）. The temperature profile of the catalyst bed and catalyst activity under different reaction parameters such as pressure, furn ace temperature, space velocity and CO2/CH4 molar ratio were in vestigated at distributed-O2 pereen t （D value） of 80%. The 200 hours stability test for the catalyst was also carried out at reaction pressure of 0.8MPa, temperature of 850℃, volume space velocity of 13800h^-1, CH4/air/H2O/CO2 volume ratio of 1：2.4：0.8：0.4, D=80%, and the results showed that the hotspot near the entrance of the catalyst bed was eliminated, and the catalyst main tained high activity and stability. These in dicated that tri-reforming of methane can be operated safely on the Ni-based catalyst in FR-OD.

关 键 词：氧分布器 甲烷 二氧化碳 三重整 合成气 稳定性 

分 类 号：TQ203[化学工程—有机化工]