助剂对活性炭负载钴催化剂氨合成活性的影响  

Effects of promoters on the activity of activated carbon supported cobalt catalysts for ammonia synthesis

作　　者：林炳裕[1] 林建新[1] 王榕[1] 魏可镁[1] 

机构地区：[1]福州大学化肥催化剂国家工程研究中心,福建福州350002

出　　处：《工业催化》2009年第1期38-42,共5页Industrial Catalysis

基　　金：国家自然科学基金(20576021);福建省科技重大专项(2005HZ01-2);国家科技支撑计划(2007BAE08B02)

摘　　要：采用四槽高压连续流动反应器研究了添加助剂Ba、K和Sm对活性炭负载钴催化剂氨合成活性的影响,结果发现,添加助剂Ba、K和Sm可以提高催化剂的氨合成活性,其中,Ba的促进效果最好,Ba与Co物质的量比为0.3时,催化活性最高。在Ba-Co/AC催化剂中,助剂Sm的加入降低了催化剂的氨合成活性,而少量K助剂(K与Co物质的量比为0.25～0.5)可以提高其催化性能,在10 MPa、10 000 h^(-1)和450 ℃条件下,双助剂催化剂的氨合成活性可达120 mmol·(g·h)^(-1),进一步增加K的量,其氨合成活性下降。The influence of promoters on the activity of activated carbon supported cobalt catalysts for ammonia synthesis was studied. The results showed that the presence of promoters such as Ba, K and Sm led to enhanced ammonia synthesis aetivity; Ba was the best promoters for Co/AC catalyst, with the optimal activity at Ba/Co molar ratio of 0.3. Addition of Sm led to decline activity of Ba-Co/AC catalyst, while a little content of potassium （ K/Co molar ratio of 0.25 - 0. 5 ） improved activity of Ba-Co/AC catalyst. Ammonia synthesis activity of over 120 mmol · （g · h）^-1 was obtained over Ba-K-Co/AC catalyst under 10 MPa, 10 000 h^-1 and 450℃.

关 键 词：无机合成化学 助剂 活性炭负载钴催化剂 氨合成 

分 类 号：TQ113.266[化学工程—无机化工] TQ426.98