Non-oxidative conversion of methane to aromatics over modified zeolite catalysts by transitional metals

الموضوعات : Iranian Journal of Catalysis

Elmira Yaghinirad ¹ (Faculty of Chemical and Petroleum Engineering, University of Tabriz, 51666-16471 Tabriz, Iran.)
Hassan Aghdasinia ² (Faculty of Chemical and Petroleum Engineering, University of Tabriz, 51666-16471 Tabriz, Iran.)
Ali Naghizadeh ³ (Faculty of Chemical and Petroleum Engineering, University of Tabriz, 51666-16471 Tabriz, Iran.)
Aligholi Niaei ⁴ (Faculty of Chemical and Petroleum Engineering, University of Tabriz, 51666-16471 Tabriz, Iran.)

تاريخ الإرسال : 25 الإثنين , ربيع الأول, 1440 تاريخ التأكيد : 22 الأربعاء , جمادى الثانية, 1440 تاريخ الإصدار : 27 السبت , رمضان, 1440

الکلمات المفتاحية: Natural gas, Dehydro-aromatization, HZSM-5 metal-modified catalyst, Nonoxidative-conversion,

ملخص المقالة :

The activity of different transitional metals over modified H-ZSM-5 catalysts for methane conversion to aromatics was compared. The first group of catalysts was Mo-impregnated H-ZSM-5 zeolites with 1, 3 and 6 wt% of Mo. The second group was M(3 wt%)- impregnated H-ZSM-5 (M: Ag, Cd, Cr, Mo, Zn and Mn). The catalytic activity of the first group was investigated at 600, 700 and 800 °C and gas hourly space velocity (GHSV) of 1500, 2250, 3600 [ml.g-1.h-1]. Likewise, the second group of catalysts was examined at 700°C and GHSV of 2250 [ml.g-1.h-1]. The catalyst samples were appropriately characterized by XRD, BET and SEM techniques. The effect of loaded transitional metals on the methane conversion was sorted on the basis of benzene yield as following: 3%wt Mo> 3%wt Zn> 3%wt Mn> 3%wt Ag> 3%wt Cd > 3%wt Cr. The highest methane conversion was 11.13% obtained over the Mo(3 wt%)-impregnated HZSM-5 catalyst.

المصادر:

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