作　　者： ; ;

机构地区： 华东化工学院

出　　处： 《华东化工学院学报》 1993年第4期505-509,共5页

摘　　要： 应用微反、XRD和TPR技术,对水煤气耐硫变换Co-Mo-K—O/γ-Al_2O_3催化剂的性能进行了研究。结果表明,原料气中H_2S的浓度在100～500ppm的实验范围内,催化剂中钾的存在能抑制在操作温度大于250℃后产生的反硫化,显著地提高催化剂的活性。K_2O的含量约在10～12%时为佳。XRD观察到,在硫化态的催化剂上,钾以KHSO_3的形式存在。硫化态的催化剂在TPR谱上有两个被H_2还原峰,表明了低温峰(T_m在200～250℃)为硫化物的还原,高温峰(550℃)则对应于氧化物的还原。 A micro-reactor system, XRD and TPR were used to study the properties of the sulfur-tolerant Co-Mo-K-O/γ-Al_2O_3 (1) for the water-gas shift reaction. The results show that the presence of potassium in the catalyst can inhibit the anti-sulfuration on (1) sulfurated during the reaction in 100～500ppm H_2Sat>250℃, which increases the catalytic activity of (1) for the topic reaction obviously. As the K_2O loading on (1) is about 10～12%, its reactivity is higher than the others. There are the X-ray diffraction lines of KHSO_3 in the XRD spetrum of (1) sulfurated. The TPR spectra of (1) sulfurated show two peaks at 200～250℃ (a) and 550℃ (β), which are associated with the reduction of metal sulfide and metal oxide respectively.

关 键 词： 钾 水煤气 变换反应 硫 催化剂

领　　域： [理学] [理学]