摘要
Direct conversion of syngas to aromatics has great potential to decrease fossil fuel dependence.Here,a unique structured hybrid catalyst composed of Fe_(3)O_(4) nanoparticles intimately dispersed inside an acidic zeolite is developed.1 to 4 nm sized Fe_(3)O_(4) nanoparticles end up evenly dispersed in an acidic and slightly mesoporous Al-ZSM-5 based on Fe_(3)O_(4) restructuring during co-hydro thermal synthesis using organosilane modification.A very high aromatic productivity of 214 mmolaromatics h^(-1) gFe^(-1) can be obtained with a remarkable 62%aromatic selectivity in hydrocarbons.This catalyst has excellent sintering resistance ability and maintains stable aromatics production over 570 h.The synthetic insights that postulate a mechanism for the metastable oxide-zeolite reorganization during hydrothermal synthesis could serve as a generic route to sinter-resistant oxide-zeolite composite materials with uniform,well-dispersed oxide nanoparticles in close intimacy with-and partially confined in-a zeolite matrix.
基金
supported financially by the National Natural Science Foundation of China(51776206)
the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(2017BT01N092)
the National Key R&D Program of China(2018YFB1501504)
the Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX20_0095)
the Fundamental Research Funds for the Central Universities(3203002104D)
the Research Foundation-Flanders(FWO,grant 12E8617N)for funding and KU Leuven grant C14/20/086
visiting scholar(2017-20202)at the Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences。
