A novel fused iron catalyst for ammonia synthesis promoted with rare earth gangue
来源期刊：JOURNAL OF RARE EARTHS2008年第5期
论文作者：WANG Rong LIN Jianxin WEI Kemei YU Xiujin LIN Bingyu
Key words：rare earth gangue; promoter; fused iron catalyst; ammonia synthesis;
Abstract: Rare earth gangue, which mainly consists of mixtures of fight rare earths such as lanthana, ceda, neodymium oxide and praseo-dymium 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 finding 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.
WANG Rong1，LIN Jianxin1，WEI Kemei1，YU Xiujin1，LIN Bingyu1
(1.National Engineering Research Center of Chemical Fertilizer Catalyst,Fuzhou University,Fuzhou 35002,China)
Abstract:Rare earth gangue, which mainly consists of mixtures of fight rare earths such as lanthana, ceda, neodymium oxide and praseo-dymium 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 finding 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.
Key words:rare earth gangue; promoter; fused iron catalyst; ammonia synthesis;
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