Preparation And Catalytic Performance Evaluation Of Fatty Acid Methyl Ester Hydrogenation To Liquid Paraffin Catalysts

Biodiesel was paid attention by all countries as a clean energy. The vegetable oil which is the feedstock for biodiesel production has high price, and leading separate production of biodiesel difficulty in the economy. Biodiesel (Fatty acid methyl ester) is an important chemical intermediates which can converted into high value-added chemicals as alcohol or liquid paraffin by chemical method. Fatty acid methyl esters can produce n-alkanes(liquid paraffin) by hydrodeoxygenation or decarboxylation. Hydrogenation of fatty acid methyl ester to liquid paraffin has a high rate of straight-chain, high purity, free of aromatics, sulfur and other impurities to compare with petroleum based liquid paraffin.There is little literature about hydrogenation of fatty acid methyl ester to liquid paraffin. In this paper, we used theγ-Al2O3 as the carrier, and inspected the influence of preparation method, catalyst activation temperature, active component content, types of additives to catalytic properties. The results showed that the Ni/NiAl2O4 catalysts have excellent hydrodeoxygenation performance.We got a conversion rate of fatty acid methyl esters at 98.9% and a 100% selectivity of n-alkanes at these process conditions:Reaction temperature 400℃, Reaction hydrogen pressure 5.0MPa, Reaction WHSV 1.Oh-1, Reaction hydrogen/oil mole ratio 15.56:1.