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发表时间：2022-10-10

发表刊物：石油学报 石油加工

所属单位：化工学院

期号：3

页面范围：611-616

ISSN号：1001-8719

摘要：A small-crystal titanium silicalite-1 (TS-1) with a crystal size of 600 nm was synthesized in a tetrapropylammonium bromide-ethylamine system . The sample was extruded , then treated with dilute tetrapropylammonium hydroxide (TPAOH) solution and fed in a fixed-bed reactor to evaluate its catalytic performances of 1-butene epoxidation with H2 O2 to 1 ,2-butene oxide . Via comparing the catalytic performances of the untreated and treated samples ,it was found that the TPAOH treatment could improve the catalytic activity and stability of TS-1 significantly ,because of the crystallization of amorphous supports on the external surface unblocking the channels of TS-1 and the hollow s generated in the crystals decreasing the diffusion limitation of substrates and products , which increased the carbon storage ability . Meanwhile , the transformation of tetrahedrally coordinated Ti to pentahedrally coordinated Ti could improve the catalytic activity of TS-1 .

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