Ni-Cu-Mn-K/γ-Al_2O_3高温变换催化剂的制备和还原条件  

Preparation parameters and reduction conditions of Ni-Cu-Mn-K/γ-Al_2O_3 catalysts for high-temperature shift reaction

作　　者：叶炳火[1] 江莉龙[1] 魏可镁[1] 林诚[2] 

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 [2]福州大学化学化工学院,福建福州350002

出　　处：《化工学报》2007年第6期1445-1450,共6页CIESC Journal

基　　金：福建省科技重点攻关项目(0507);福州大学科技育苗基金项目(2005-XY-05)。~~

摘　　要：以γ-Al2O3为载体,采用二步等体积浸渍法,制备了多元体高温水煤气变换催化剂。采用活性表征、TG、DTA和TPR等方法,考察了制备参数和还原条件对催化剂的影响。结果表明:第一步浸渍时间为300min时达到浸渍平衡;第一步浸渍组分(Ni∶Cu∶Mn)配比2∶1.5∶1、第二步K+的加入量为5%、焙烧温度400℃时制得的催化剂具有高活性;还原最高温度为400℃,还原过程添加适量的水蒸气时,催化剂具有良好的催化性能和热稳定性能。催化性能优于国内外现有工业产品。而且还消除了传统的共沉淀法制备工艺产生的大量氨氮废水。Using /γ-Al2O3 as a support, a multiple-metal （Ni-Cu-Mn-K/-Al2O3） catalyst for high- temperature water gas shift reaction was prepared by an equivalent-volumetric two-step impregnation method. Preparation parameters and reduction conditions were determined by TG, DTA and TPR characterization techniques. The results showed that, when loading ratio （Ni ： Cu ： Mn）, impregnation time, and calcination temperature were 2 ： 1.5 ： 1, 300 min and 400℃ for the first-step impregnation respectively, loading of K＋ was 5 %in the second step impregnation, and reduction temperature was 400℃ and a proper amount of steam was added, the catalyst prepared in this work showed excellent catalytic performance and thermal stability, as compared with the existing commercial catalysts. Meanwhile, the ammonium-nitrogen wastewater produced with conventional preparation methods was eliminated with the eqivalent-volumetic impregnation method proposed in this work.

关 键 词：水煤气变换催化剂 多元体金属组分 等体积浸渍法 制备参数 还原条件 

分 类 号：O643.3[理学—物理化学]