Hydrothermal hydrogenation/deoxygenation of palmitic acid to alkanes over Ni/activated carbon catalyst  

作　　者：Min Lin Yuhao Yan Xiaoxian Li Rui Li Yulong Wu 

机构地区：[1]MOE Engineering Center of Forestry Biomass Materials and Bioenergy,Beijing Forestry University,Beijing 100083,China [2]Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China [3]Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education,Tsinghua University,Beijing 100084,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第2期8-18,共11页中国化学工程学报（英文版）

基　　金：the financial support from National Natural Science Foundation of China(21838006,21776159);National Key Research and Development Program of China(2018YFC1902101)。

摘　　要：To produce paraffin from hydrogenation/deoxygenation of palmitic acid,model compound of bio-oil obtained by hydrothermal liquefaction(HTL)of microalgae has been an attractive focus in recent years.In order to avoid energy-intensive separation process of water and bio-oil,it is of importance that deoxygenation upgrading of fatty acids under hydrothermal conditions similar to HTL process.Herein,it is the first time to explore the application of activated carbon(AC)-supported non-noble-metal catalysts,such as Ni,Co,and Mo,and so on,in the hydrothermal hydrogenation/deoxygenation of long-chain fatty acids,and the obtained Ni/AC-H(the Ni/AC was further H_(2)pre-reduced)is one of the best catalysts.In addition,it is found that the catalytic activity can be further improved by H_(2)pre-reduction of catalyst.Characterization results that are more low valences of nickel and oxygen vacancy can be obtained after H_(2)pre-reduction,thus significant promoting the deoxygenation especially the decarbonylation pathway of fatty acids.The total alkanes yield can reaches 95.9%at optimal conditions(280℃,360 min).This work confirmed that the low-priced AC-supported non-noble-metal catalysts have great potential compared with the noble-metal catalyst,in hydrothermal upgrading of bio-oil.

关 键 词：BIO-OIL Fatty acids DEOXYGENATION Hydrothermal upgrading 

分 类 号：TQ426[化学工程] TQ221