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Abstract A monolithic catalyst Pt/support/cordierite was prepared with hydrogen zeolite sieve molecular-5 (HZSM-5) and oxides (Al2O3，TiO2 and SiO2) coating as support, cordierite as matrix and Pt as active component. The structure and properties of the catalyst were characterized by XRD, SEM, TEM and XPS. The effects of carriers and Pt loads on the catalytic reaction performance of hydrogen in low temperature were investigated when the volume concentration of hydrogen is 2.5%. The results show that the monolithic catalyst supported by HZSM-5 has the best performance, which is related to the good adhesion of the active layer, the good distribution of Pt and the uniform particle size. The catalyst with SiO2 as support shows the worst performance, because the support has the least Pt0 with weak Pt load. Pt/HZSM-5/cordierite monolithic catalyst shows better catalytic activity when the load of Pt is 0.01 g·L-1. With Pt load of 0.05 g·L-1 and more, Pt/HZSM-5/cordierite monolithic catalyst can rapidly set up even at room temperature and achieve 100% conversion.
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Received: 20 March 2021
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2023, Vol. 44 
