In this work,a series of multi metal oxide supported on multistage porous molecular sieve for catalytic combustion of chlorobenzene in flue gas are synthesized.The catalytic test results show that among all synthesized catalysts,50FeMnRu/HZSM5(0.26)exhibits the best catalytic activity of chlorobenzene oxidation,in which HZSM5(0.26)was prepared with a crystalline formula of SiO2∶Al2O3∶TPAOH∶H2O=60∶0.3∶0.26∶1500.And no obvious chlorobenzene conversion can be seen on the multi-stage porous molecular sieve(HZSM5(0.26));Meanwhile,both of Fe/HZSM5(0.26)and Mn/HZSM5(0.26)perform worse catalytic performance.The characterization results indicate that compared to Fe/HZSM5(0.26),Mn/HZSM5(0.26)and Ru/HZSM5(0.26),50FeMnRu/HZSM5(0.26)retains the multi-level pore structure of HZSM5(0.26)and has a larger average pore size,which can reduce the diffusion resistance of the reactants and increase the dispersibility of the active components,thereby enhancing catalytic activity;Moreover,50FeMnRu/HZSM5(0.26)has a lower reduction temperature and higher hydrogen consumption,which improves the low-temperature oxidation-reduction ability of the catalyst,thereby enhancing its catalytic of ability chlorobenzene oxidation.
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