镁铝混合氧化物负载镍催化剂上液化石油气的预重整

催化学报 , 2012, 33(7): 1176-1182. doi: 10.3724/SE.J.1088.2012.20138

镁铝混合氧化物负载镍催化剂上液化石油气的预重整

王新星 ^1, , 汪学广 ^2, , 尚兴付 ^3, , 聂望欣 ^4, , 邹秀晶 ^5, , 鲁雄钢 ^6, , 丁伟中 ^7,

1.上海大学上海市现代冶金与材料制备重点实验室,上海 200072

2.上海大学上海市现代冶金与材料制备重点实验室,上海 200072

3.上海大学上海市现代冶金与材料制备重点实验室,上海 200072

4.上海大学上海市现代冶金与材料制备重点实验室,上海 200072

5.上海大学上海市现代冶金与材料制备重点实验室,上海 200072

6.上海大学上海市现代冶金与材料制备重点实验室,上海 200072

7.上海大学上海市现代冶金与材料制备重点实验室,上海 200072

基金项目: 国家高技术研究发展计划(863计划(2006AA11A189) 上海市科学技术委员会重点项目(07DZ12036;08DZ12064) 高等学校博士学科点专项科研基金

关键词：镍催化剂 , 镁铝混合氧化物 , 液化石油气 , 预重整 , 水蒸气重整

Pre-reforming of Liquefied Petroleum Gas over Magnesium Aluminum Mixed Oxide Supported Nickel Catalysts

采用共沉淀-浸渍法并在较低温度(400～700℃)下焙烧制备了镁铝混合氧化物(MgmAl)负载的Ni催化剂.X射线衍射和程序升温还原结果表明,Ni物种高度分散于催化剂表面,没有形成尖晶石NiAl2O4.在650℃可被还原成金属Ni纳米晶粒,在400℃和较低水/碳摩尔比(S/C=2)条件下表现出较好的催化液化石油气(LPG)重整反应性能.详细考察了Mg/Al摩尔比、Ni负载量、载体和催化剂的焙烧温度对催化剂活性和稳定性的影响,结果表明,由500℃焙烧的Mg1.25Al载体负载的15％Ni催化剂,并于500℃焙烧时,在LPG重整反应中表现出最优的性能,尽管它比高温(≥800℃)焙烧制备的Ni/MgmAl催化剂更易积炭,催化活性和稳定性有所下降,但由于还原温度较低,在交通和小规模供电的燃料电池领域更具实际应用意义.

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