کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
63528 48222 2016 7 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
A graphene-supported copper-based catalyst for the hydrogenation of carbon dioxide to form methanol
ترجمه فارسی عنوان
یک کاتالیزور مبتنی بر مس پشتیبانی شده با گرافن برای هیدروژنه کردن دی اکسید کربن برای تشکیل متانول
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Graphene as novel support was used for developing a new copper-based catalyst.
• New catalyst with big surface area increase H2 adsorption and copper reducibility.
• The catalytic activity is improved and Cu sintering is hindered due to graphene.

The use of reduced graphene oxide (rGO) as a novel support for the CuO-ZnO-ZrO2-Al2O3/rGO (CZZA/rGO) catalyst in forming methanol by carbon dioxide hydrogenation has been studied herein. Furthermore, the CuO-ZnO-ZrO2-Al2O3 (CZZA) catalyst was also prepared to compare catalytic performance. The catalysts were characterized using BET specific surface area, X-ray diffraction (XRD), H2-temperature-programmed reduction (H2-TPR), scanning electron microscopy (SEM), H2-temperature-programmed desorption (H2-TPD) and CO2-temperature-programmed desorption (CO2-TPD) techniques and were evaluated by a fixed-bed reactor for methanol synthesis from the hydrogenation of carbon dioxide. The characterization results show that the surface area of the CZZA/rGO catalyst was 125.6 m2/g and the adsorption capacity of H2 and CO2 increased remarkably due to the support of rGO. Moreover, the CO2 conversion over the CZZA/rGO catalyst was 14.7% under optimum reaction conditions (a temperature of 513 K, a pressure of 20 bar, and a space velocity of 6075 h−1). The methanol yield was 11.6%, while that of CZZA catalyst without rGO support was only 9.8%. The superior activity of the CZZA/rGO catalyst could be attributed to its large surface area and high H2 and CO2 adsorption capacity, which prevent the catalyst sintering and led to a higher CO2 conversion and methanol selectivity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of CO2 Utilization - Volume 16, December 2016, Pages 150–156
نویسندگان
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