کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6456375 1419847 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of methanol and dimethyl ether from the CO2 hydrogenation over Cu·ZnO supported on Al2O3 and Nb2O5
ترجمه فارسی عنوان
سنتز متانول و دی متیل اتر از هیدروژناسیون CO2 بر روی Cu · ZnO پشتیبانی شده بر روی Al2O3 و Nb2O5
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


- The CO2 hydrogenation over Cu·ZnO supported on Al2O3 and Nb2O5 was studied.
- Catalysts were prepared by precipitation or impregnation of the metals over the supports.
- Catalysts were characterized by XRF, XRD, TPR, BET area, TPD of n-butylamine.
- The catalyst prepared by impregnation of the metals on Al2O3 was the most active and selective to DME.
- Results may be explained in terms of the reducibility of the Cu species.

We report the synthesis, characterization and catalytic evaluation of Cu·ZnO catalysts supported on Al2O3 and Nb2O5, as acidic materials, to study the CO2 hydrogenation to methanol and dimethyl ether. The catalysts were prepared by precipitation or impregnation of the metals over the supports. They were characterized by different techniques, such as XRF, BET area, TPD of n-butylamine, XRD and TPR. Catalytic tests were performed in an automated catalytic unit coupled to a gas chromatograph with FID and TCD detectors. Different conditions of temperature and pressure were studied. It could be observed that the choice of the synthesis method affects the activity and selectivity of the CO2 hydrogenation, at the conditions used in this work. The catalyst prepared by impregnation of the metals over the Al2O3 support was the most active and selective to dimethyl ether. This result can be explained by the better and lower temperature reducibility of CuO particles along with higher density of acid sites and strength of the alumina support.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of CO2 Utilization - Volume 15, September 2016, Pages 83-88
نویسندگان
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