Mo-Co-Mg/Al_2O_3工业耐硫变换催化剂的失活

Deactivation of Commercial Sulfur resisting WGSR Catalyst Mo Co Mg/ γ Al 2O 3

利用活性评价、程序升温技术、硫的测定、Ｘ光衍射和孔结构分析等手段，对工业耐硫变换催化剂（Ｋ）失活原因进行了研究，并与模型催化剂进行了比较．结果表明，催化剂（Ｋ）失活的原因是烧结；部分物相分离及转化生成不活泼ＭｏＳ２、ＣｏＳ２、ＣｏＳＯ４和ＭｇＡｌ２Ｏ４及活性硫转化为非活性硫．模型实验表明，反应温度偏高和水蒸汽量过大是加速失活的主要原因．

The deactivation of commercial catalyst for water gas shift reaction(WGSR) has been studied through activity evaluation, temperature programmed technique, XRD, porosity and sulfur content measurements. It is found that the deactivation of a long run catalyst is the results of sintering, formation of the inactive phases of MoS 2, CoS 2, CoSO 4 and MgAl 2O 4, and irreversible conversion of the active sulfur component into inactive ones. Temperature and steam advance the deactivation.