Abstract:

Mo-based catalysts are considered to be the most promising ones for higher alcohol synthesis from syngas due to their unique nature of sulfur tolerance and anti-coking. While，the catalyst performance is remarkably affected by addictives. The selectivity for alcohol can be dramatically improved by the addition of alkali metal，but the CO conversion is decreased. The catalyst activity is also significantly influenced by the anionic species in alkali metal salts. The selectivity for C₂₊ alcohols can be improved by the introduction of Co，Ni and Rh etc. into the alkali metal-doped catalysts. Rh is beneficial to the enhancement in alcohol selectivity，but with harsh reaction conditions and high cost. Different catalyst shows different catalytic reaction mechanism，which is related to the catalyst surface phase. Molybdenum-based catalysts with high performance for CO hydrogenation to alcohols were expected to be obtained if addictives are properly selected.

摘要：

钼基催化剂具有独特的抗硫性和抗积炭性，在合成气制低碳醇催化体系中最具发展前景。钼基催化剂催化性能受助剂的影响较大。碱金属的加入能明显提高催化剂对醇的选择性，但使CO转化率下降；碱金属盐中阴离子种类对反应活性影响显著；将Co、Ni、Rh等加入碱金属掺杂的催化剂中，可以提高C₂₊醇的选择性；助剂Rh有利于醇选择性的提高，但反应条件苛刻，成本较高。不同类型催化剂的催化反应机理不同，与表面物相种类有关。选择适当助剂，有望得到性能优良的CO加氢合成低碳醇钼基催化剂。