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A novel fused iron catalyst for ammonia synthesis promoted with rare earth gangue 被引量:6
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作者 俞秀金 林炳裕 +2 位作者 林建新 王榕 魏可镁 《Journal of Rare Earths》 SCIE EI CAS CSCD 2008年第5期711-716,共6页
Rare earth gangue, which mainly consists of mixtures of light rare earths such as lanthana, ceria, neodymium oxide and praseodymium oxide, was used as the promoter of fused iron catalysts for ammonia synthesis. The re... Rare earth gangue, which mainly consists of mixtures of light rare earths such as lanthana, ceria, neodymium oxide and praseodymium oxide, was used as the promoter of fused iron catalysts for ammonia synthesis. The result showed that the activity of the catalyst promoted with rare earth gangue was comparable with those of commercial iron catalysts with high amount of cobalt. The role of rare earths was owed to their advantages for favoring the deep reduction of the main composite in catalyst, i.e., iron oxide. This fmding indicated that the use of rare earth gangue could decrease the content of cobalt or even completely replace cobalt, which was used to be regarded as unsub- stitutable promoters for high performance ammonia catalyst; therefore, the cost of fused iron catalysts would decrease significantly. 展开更多
关键词 rare earth gangue PROMOTER fused iron catalyst ammonia synthesis
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