An efficient multifunctional catalyst for CO2 hydrogenation to gasoline
Image by WEI Jian
The research team led by Dr. SUN Jian and Prof. GE Qingjie in Dalian Institute of Chemical Physics, has succeeded in preparing a high efficient, stable, and multifunctional Na-Fe3O4/HZSM-5 catalyst for the direct production of gasoline from CO2 hydrogenation. This catalyst exhibited 78% selectivity to C5-C11 as well as low CH4 and CO selectivity under industrial relevant conditions. And gasoline fractions are mainly isoparaffins and aromatics thus favoring the octane number. Moreover, the multifunctional catalyst exhibited a remarkable stability for 1,000 h on stream, which definitely has the potential to be a promising industrial catalyst for CO2 utilization to liquid fuels.
In-depth characterizations indicate that this catalyst enables RWGS over Fe3O4 sites, olefin synthesis over Fe5C2 sites and oligomerization/aromatization/isomerization over zeolite acid sites. The concerted action of the active sites calls for precise control of their structures and proximity. This study paves a new path for the synthesis of liquid fuels by utilizing CO2 and H2. Furthermore, it provides an important approach for dealing with the intermittency of renewable sources (sun, wind and so on) by storing energy in liquid fuels.
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