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1.A new concept of multiple functional catalyst with core-shell structure is developed by our group.Syngas firstly passes through acidic zeolite shell membrane to reach inner Fischer-Tropsch synthe sis (FTS) core catalyst,forming normal paraffins (diesel).Before leaving catalyst,all these linear hydrocarbons must be hydrocracked and isomerized at acidic sites of zeolite,forming gaso line (isoparaffins).The prepared capsule catalysts show excellent performance for the direct syn thesis of isoparaffins based on the FTS reaction.