关键词: Fe₂O₃-CuO/ZSM-5, 催化剂, 部分氧化, 瓦斯, 甲醇

Abstract: The conversion of mine gas as the feedstock to produce highly valuable chemicals and liquid fuel(methanol) has become a research hot spot. Catalytic oxidation, an effective technique for activating mine gas, has received considerable attention in recent years. The research on highly efficient and cheap catalysts is critically important for catalytic oxidation of mine gas into methanol.Using ferric nitrate, copper nitrate and ZSM-5 molecular sieve as raw materials, Fe₂O₃/ZSM-5, CuO/ZSM-5 and Fe₂O₃-CuO/ZSM-5 catalysts were prepared by the ion exchange method, and their selective oxidation of low concentration mine gas to methanol were investigated in acetic acid. Results showed that Fe₂O₃/ZSM-5, CuO/ZSM-5 and Fe₂O₃-CuO/ZSM-5 all had catalytic activity for the selective oxidation of mine gas to methanol, and Fe₂O₃-CuO/ZSM-5 exhibited the most evident catalytic effect. Meanwhile, the active metal loading had significant effect on the catalytic activity of the catalyst, and theoretically the best loadings of Fe and Cu were 4.21% and 3.22%, respectively. When the addition of Fe₂O₃-CuO/ZSM-5 (x_Fe=4.21%, x_Cu=3.22%) was 0.1g and the amount of acetic acid was 30mL, the optimum reaction conditions of oxidation of mine gas (with the volume fraction of methane being 20%) to methanol catalyzed by Fe₂O₃-CuO/ZSM-5 were: initial reaction pressure 4.0 MPa, reaction temperature 200℃ and reaction time 3h.

Key words: Fe₂O₃-CuO/ZSM-5, catalyst, partial oxidation, mine gas, methanol