申请人:Hitachi Zosen Corporation
公开号:EP2402081A1
公开(公告)日:2012-01-04
Disclosed is an ammonia decomposition catalyst which is obtained by heat-treating a complex at a temperature of 360°C to 900°C in a reducing atmosphere, wherein the complex containing a polymer having a molecular weight of 1,000 to 500,000 represented by the formula [I], a transition metal coordinated with the polymer, and an activated carbon or a carbon nanotube added thereto. In a case of using the carbon nanotube, an alkali metal compound or an alkaline earth metal compound is added to the heat-treated complex. R1 represents H or hydrocarbon having 1 to 10 carbon atoms, R2 and R3 each represent H, halogen, nitro, acyl, ester, carboxyl, formyl, nitrile, sulfone, aryl, or alkyl group having 1 to 15 carbon atoms, X and Y each represent H or OH, Z represents CH or N, R4 and R5 each represent H, OH, ether, amino, aryl, or alkyl group having 1 to 15 carbon atoms, x represents a real number of 1 to 2, y represents a real number of 1 to 3, and n represents a real number of 2 to 120. The amount of the transition metal deposited on the catalyst can be increased without deteriorating the dispersion of the metal, so that the amount of the catalyst required to obtain a desired activity can be reduced.
本发明公开了一种氨分解催化剂,该催化剂是通过在还原气氛中于 360°C 至 900°C 的温度下对络合物进行热处理而获得的,其中络合物含有分子量为 1,000 至 500,000 的聚合物(由式 [I] 表示)、与聚合物配位的过渡金属以及添加到其中的活性炭或碳纳米管。在使用碳纳米管的情况下,在热处理后的复合物中加入碱金属化合物或碱土金属化合物。R1 代表 H 或具有 1 至 10 个碳原子的烃,R2 和 R3 分别代表 H、卤素、硝基、酰基、酯、羧基、甲酰基、腈基、砜基、芳基或具有 1 至 15 个碳原子的烷基,X 和 Y 分别代表 H 或 OH、Z 代表 CH 或 N,R4 和 R5 各自代表 H、OH、醚、氨基、芳基或具有 1 至 15 个碳原子的烷基,x 代表 1 至 2 的实数,y 代表 1 至 3 的实数,n 代表 2 至 120 的实数。在不影响金属分散性的情况下,可以增加沉积在催化剂上的过渡金属的量,从而减少获得所需活性所需的催化剂量。