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We have been studying the effect of acidity of zeolite on its catalytic activity toward non-oxidative coupling (NOC) of CH_4, employing a newly developed catalyst; B-doped MFI-type zeolite (H-[B]ZSM-5...). It was prepared by a hydrothermal method with a structural directing agent, TPABr. The 6%Mo/H-ZSM-5 and 6%Mo/H-[B]ZSM-5 catalysts were synthesized by wetness impregnation. The NOC of methane was performed in a fixed bed reactor at 1023 K under atmospheric pressure. The results showed that the CH_4 conversion at TOS of 360 min was around 14% for both catalysts. The 6%Mo/H-[B]ZSM-5 exhibited a higher stability than the other, producing C_2H_4/C_2H_6, C_6H_6 and H_2 at higher yields as well (0.06, 0.11 and 6.49 mol%, respectively) than 6%Mo/H-ZSM-5 (0.04, 0.07 and 4.75 mol%, respectively). Moreover, the coke deposition onto the 6%Mo/H-[B]ZSM-5 was 12.3 %wt. which was lower than 6%Mo/H-ZSM-5 (18.4 %wt.).続きを見る
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