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Boosting CO_(2) hydrogenation to high-value olefins with highly stable performance over Ba and Na co-modified Fe catalyst

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Journal of Energy Chemistry 2023年第5期80卷 614-624,I0014页

作者： Joshua Iseoluwa Orege Na Liu cederick cyril amoo Jian Wei Qingjie Ge Jian Sun Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

CO_(2)hydrogenation has been considered to be a highly promising route for the production of high-value olefins(HVOs)while also mitigating CO_(2)***,it is challenging to achieve high selectivity and maintain stable performance for HVOs(ethylene,propylene,and linear a-olefins)over a prolonged reaction time due to the difficulty in precise control of carbon coupling and rapid catalyst ***,we present a selective Ba and Na co-modified Fe catalyst enriched with Fe_(5)C_(2)and Fe_(3)C active sites that can boost HVO synthesis with up to 66.1%selectivity at an average CO_(2)conversion of 38%for over 500 *** to traditional NaFe catalyst,the combined effect of Ba and Na additives in the NaBaFe-0.5 catalyst suppressed excess oxidation of FeCxsites by H_(2)*** absence of Fe3O4phase in the spent NaBaFe-0.5 catalyst reflects the stabilization effect of the co-modifiers on the *** study provides a strategy to design Fe-based catalysts that can be scaled up for the stable synthesis of HVOs from CO_(2)hydrogenation.

关键词： CO_(2)hydrogenation High-value olefins Barium additive Iron carbide Catalytic stability

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Sputtering FeCu nanoalloys as active sites for alkane formation in CO_(2) hydrogenation

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Journal of Energy Chemistry 2022年第7期31卷 162-173,I0005页

作者： Zhiyan Si cederick cyril amoo Yu Han Jian Wei Jiafeng Yu Qingjie Ge Jian Sun Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

Catalytic conversion of CO_(2) to high-value products is a crucial method to achieve targets of carbon dioxide emissions peak and carbon ***,realizing a controllable product distribution in a single CO_(2) hydrogenation process is of great ***,we prepared the CuFe nanoalloy catalyst that directly transforms CO_(2) to alkanes using physical sputtering method in mild *** characteristic results show that the proximity between Cu and Fe is the crucial factor to tunable products among the different *** formation of unique coordination of FeCu4 nanoalloys from high-energy sputtering process provides close interaction between Cu and Fe,which is favorable to formation of low carbon paraffin,however,a distant proximity and weak interaction will increase the selectivity of olefins and *** work provides a general strategy for tuning target chemicals and enriches the viewpoints in CO_(2) hydrogenation.

关键词： CO_(2)hydrogenation Physical sputtering FeCu nanoalloys Proximity Paraffin

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A facile solvent-free synthesis strategy for Co-imbedded zeolite-based Fischer-Tropsch catalysts for direct gasoline production

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Chinese Journal of Catalysis 2020年第4期41卷 604-612页

作者： Mudassar Javed Shilin Cheng Guihua Zhang cederick cyril amoo Jingyan Wang Peng Lu Chengxue Lu Chuang Xing Jian Sun Noritatsu Tsubaki School of Biological and Chemical Engineering Zhejiang University of Science and TechnologyHangzhou 310023ZhejiangChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Beijing Booming Highchem Technology Co. LTDBeijing 100005China Department of Applied Chemistry Graduate School of EngineeringUniversity of ToyamaGofuku 3190Toyama 9308555Japan

A series of Co-imbedded zeolite-based catalysts were synthesized following a facile solvent-free grinding *** catalytic performance for direct syngas conversion to gasoline range hydrocarbons was compared with their counterpart Co-impregnated zeolite-based *** transformation of solid raw materials to targeted zeolite was confirmed by XRD,SEM,STEM,and N2 physisorption *** in-depth study of acidic strength and acidic site distribution was conducted by NH3-TPD and Py-IR *** strength showed a pivotal role in defining product ***@S1,with the weakest acidic strength of silicalite-1 among three types of zeolites,evaded over-cracking of product and exhibited the highest gasoline and isoparaffin selectivity(≈70%and 30.7%,respectively).Moreover,the solvent-free raw material grinding route for zeolite synthesis accompanies several advantages like the elimination of production of wastewater,high product yield within confined crystallization space,and elimination of safety concerns regarding high pressure due to the absence of the *** and easiness of the solvent-free synthesis route together with promising catalytic performance strongly support its application on the industrial scale.

关键词： Solvent-free synthesis Co-imbedded zeolite catalyst Fischer-Tropsch synthesis Gasoline Isoparaffin

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