- مبلغ: ۸۶,۰۰۰ تومان
- مبلغ: ۹۱,۰۰۰ تومان
The upgrading of the petroleum cracking distillates using cheap methane rather than naturally unavailable hydrogen is an economically attractive process. This work clearly demonstrates the feasibility of methanotreating by directly using methane over zeolite-supported catalyst to convert olefins. The introduction of methane decreases the fraction of olefins and increases the fraction of paraffins in the liquid products obtained from the reaction using 1-decene as the olefin model compound when Ag-Ga/ZSM-5 is charged. It also improves the quality of liquid product in terms of higher H/C atomic ratio, higher heating value and lower bromine number. The interaction between olefins and methane on the surface of the catalyst is evidenced by DRIFT spectroscopy. When propylene is used as the olefin model compound, the shift of the peaks due to the interaction between adsorbed propylene species and catalyst surface as well as the generation of new peaks after the introduction of methane are observed. When 1-decene is used as the model compound, the suppressed intensity of AC@CA signal and enhanced alkane CAH bending peak intensity when CH4 is present indicate the conversion of olefins into paraffins. The improved particle dispersion of the charged catalyst upon the reaction under CH4 environment is also noticed from the TEM images, which might be closely related to its better olefin upgrading performance. The outcomes from this study might create an alternative route for cracked distillates upgrading and provide a positive attempt for more valuable methane utilization.