载体对甲烷催化部分氧化制合成气的影响

Effects of supports on partial oxidation of methane to syngas

运用固定床流动反应装置、ＴＰＲ和ＸＲＤ等手段考察了载体的晶相组成、比表面和孔结构等性质对Ｎｉ基催化剂在甲烷部分氧化制合成气中反应性能的影响。结果表明，热稳定性好、导热好的惰性材料如（Ｃａ）ＭｇＡｌ２Ｏ４等是甲烷部分氧化制合成气理想的催化剂载体。载体必须具有适当的比表面和孔结构，以利于反应物分子在催化剂表面吸附并与活性中心充分接触，同时也有利于产物分子脱附并离开催化剂表面，防止副反应（积碳反应和燃烧反应）的发生，及时把反应热移走，避免热点产生使催化剂失活。另外还发现。

The activity of nickel catalysts on different supports were examined in a fixedbed flow reactor. The influences of support component, surface area and pore radius on the performance of catalysts were investigated through temperature-programmed reduction (TPR) and XRD analysis.It is found that the inert material as (Ca)MgaAl2O4,with certain surface area and pore radius,high thermal stability and fine heatconduction is an ideal catalyst support for partial oxidation of methane to syngas.It is also found there is each one optimum space velocity for catalyst with different surface area and pore radius.