The optimum conditions for methanol conversion to dimethyl ether over modified sulfated zirconia catalysts prepared by different methods

被引：0
|
作者：
Doaa S.EL-DESOUKI [1 ]
Amina H.IBRAHIM [1 ]
Samira M.ABDELAZIM [1 ]
Noha A.K.ABOUL-GHEIT [1 ]
Dalia R.ABDEL-HAFIZAR [2 ]
机构：
[1] Processes Development Department,EPRI
[2] Refining Department,EPRI
来源：
燃料化学学报 | 2021年 / 49卷 / 01期
关键词：
D O I：
暂无
中图分类号：
TQ426 [催化剂（触媒）]; TQ223.24 [];
学科分类号：
080502 ; 081705 ;
摘要：
Sulfated zirconia (SZ) and two promoted 1%Mn/SZ catalysts which have been prepared via sol gel (Mn/SZ-S) and impregnation (Mn/SZ-I) methods were studied.The morphology of the catalysts was characterized by XRD,BET,NH3-TPD,ICP,SEM and FT-IR analysis.The conversion of methanol to dimethyl ether and hydrocarbons was carried out in the temperature range of 120-300 ℃.The Mn/SZ-S showed the highest activity due to the high surface area with suitable acidity.The optimum condition of Mn/SZ-S catalyst was investigated at 200°C and LHSV of 0.02 h-1in a time range from 30 to 210 min.It was found that the total conversion decreased from 80.18% to 53.26% at 210 min.The reusability of this catalyst was studied at the optimum condition up till four cycles for 1 h.The characterization of the reused catalyst showed a significant change in the structure and surface acidity due to the blockage of the surface acid sited by carbonaceous materials.
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页码：63 / 71
页数：9
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