Non-oxidative methane aromatization by bimetallic (La, Co, Pd, and Pt) M-Zn/HZSM-5: Impact of propane addition

作者：Bijani P Moghimpour^*; Sohrabi M; Sahebdelfar S; Gholidoust A

来源：Scientia Iranica, 2018, 25(3): 1423-1433.

DOI：10.24200/sci.2018.5050.1062

• Methane
• Propane
• Aromatization
• Zn-modified HZSM-5
• Promoter

The non-oxidative aromatization of methane was studied over M-Zn/HZSM-5 (M = La, Co, Pd, and Pt) catalysts using propane as a co-reactant. The catalysts were characterized by BET, SEM, NH3-TPD, and XRD techniques. Catalytic tests were performed in a fixed-bed reactor at 823 K using a mixture of methane, propane, and nitrogen with ratio of 6/1/1.3, respectively. Propane conversion was above 50% and remained stable in the first 12 hours on stream; however, the methane conversion rapidly dropped from a high of about 10% to zero within 4 hours, implying the absence of a stoichiometric reaction between the reactants. Both zinc and the second metal (M) had a beneficial effect on aromatic selectivity, and Pt-2n/HZSM-5 exhibited the highest aromatic yields and catalyst stability. The results of the present study showed that co-feeding of methane with propane cannot successfully induce methane to participate in aromatization reactions.

• 出版日期2018-6