کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11023545 1701271 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Methane decomposition over Ni/carbon catalysts prepared by selective gasification of coal char
ترجمه فارسی عنوان
تجزیه متان بر کاتالیزورهای نیکل / کربن بوسیله گازی سازی انتخابی کارخانه ذغال سنگ
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
Catalytic methane decomposition (CMD) can pave the route for co-production of COx free hydrogen and valuable carbon materials, and it is considered as a potential promising strategy to develop eco-friendly and low-carbon hydrogen economy. However, there are still some challenges for utilization of traditional metal and/or carbon catalysts. In this work, relatively dispersed and efficient Ni/carbon catalysts were handily prepared for CMD by selective steam gasification of coal char with addition of nickel and/or cerium compositions. Carbothermal reduction during the gasification process could enable in-situ formation of Ni0 crystallites and facilitate the gasification efficiency and thus achieving co-production of hydrogen-rich gas and Ni/carbon hybrids with large surface areas (217-265 m2/g). When the Ni/carbon hybrids as the selective gasification residues were used for CMD, high and stable methane conversion (up to about 90% at 850 °C) can be obtained in the 600-min CMD reaction, thanks to the relatively dispersed and active Ni0 crystallites, large surface area of the porous carbon support and formation and growth of the fibrous carbon deposits.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 177, 1 December 2018, Pages 330-338
نویسندگان
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