Regulating the nanoscale intimacy of metal and acidic sites in Ru/γ-Al_(2)O_(3)for the selective conversions of lignin-derived phenols to jet fuels  

作　　者：Shanshuai Chen Weichen Wang Xue Li Puxiang Yan Wanying Han Tian Sheng Tiansheng Deng Wanbin Zhu Hongliang Wang 

机构地区：[1]Center of Biomass Engineering/College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193,China [2]Sanya Institute of China Agricultural University,Sanya 572025,Hainan,China [3]College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241000,Anhui,China [4]Shanxi Engineering Research Center of Biorefinery,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,Shanxi,China

出　　处：《Journal of Energy Chemistry》2022年第3期576-586,I0015,共12页能源化学（英文版）

基　　金：supported by the National Key R&D Program of China(2018YFB1501500);the 2115 Talent Development Program of China Agricultural University;the National Natural Science Foundation of China(21903001);the Natural Science Foundation of Anhui Province(1908085QB58);the Chinese Universities Scientific Fund(2020TC116);the Research Innovation Fund for Graduate Students of CAU(2020XYZC05A)。

摘　　要：Catalytic hydrodeoxygenation(HDO)of biomass-derived oxy-compounds to advanced hydrocarbon fuels usually requires bifunctional catalysts containing metals and acidic sites.The appropriate tuning of metal and/or acidic active sites at interfaces of bifunctional catalysts can significantly improve catalyst activity and product selectivity.Here,4-trifuoromethyl salicylic acid(TFMSA),as a hydrothermal stable organic acid,was employed to tailor the bifunctional interface of Ru/γ-Al_(2)O_(3)to enhance the catalytic performance on converting lignin-derived phenols to jet fuel range cycloalkanes.More than 80%phenol was converted into cyclohexane at 230°C for 1 h over Ru/γ-Al_(2)O_(3)modified by TFMSA,which was about three times higher than that over unmodified Ru/γ-Al_(2)O_(3).X-ray diffraction(XRD),Transmission electron microscope(TEM),H2 chemisorption,and energy dispersive X-ray spectroscopy(EDS)elemental mapping results indicated that Ru nanoparticles and TFMSA were well distributed onγ-Al_(2)O_(3),and a nanoscale intimacy between Ru and TFMSA was reached.Meanwhile,Fourier transform infrared spectroscopy after pyridine adsorption(Py-FT-IR)analysis proved that Brønsted acidic sites on the catalytic interfaces of TFMSA modified Ru/γ-Al_(2)O_(3)had been improved.Moreover,the kinetic and density functional theory(DFT)results suggested that the synergistic effects of adjacent Ru nanoparticles and acidic sites were crutial for promoting the rate-limiting conversion step of phenol HDO to cyclohexane.

关 键 词：LIGNIN PHENOLS Bifunctional catalysts HYDRODEOXYGENATION Jet fuels 

分 类 号：TQ426[化学工程] TK6[动力工程及工程热物理—生物能]