کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10273085 | 461194 | 2011 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Methane reforming of syngas produced by co-gasification of coal and wastes. Effect of catalysts and of experimental conditions
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Methane reforming of syngas produced by co-gasification of coal and wastes. Effect of catalysts and of experimental conditions Methane reforming of syngas produced by co-gasification of coal and wastes. Effect of catalysts and of experimental conditions](/preview/png/10273085.png)
چکیده انگلیسی
Syngas obtained by co-gasification of coal and wastes was hot cleaned in two catalytic reactors, which allowed destroying tar and gaseous hydrocarbons with more than one carbon atom. H2S and NH3 contents were also significantly reduced, but CH4 concentrations varying between 2% and 10% and small amounts of H2S (below 100Â ppmv) were still found in syngas, depending on coal type and waste composition. This paper studies the effect of experimental conditions on CH4 destruction by reforming reactions in absence and in presence of catalysts. The effect of experimental conditions (temperature, steam flow rate and syngas composition) on CH4 destruction and on CO conversion into CO2 in the absence of catalyst was studied first, using the Equilibrium Reactor model from CHEMKIN modelling software. The selected experimental conditions were then tested in a fixed bed reactor with and without catalyst and the results obtained were consistent with CHEMKIN Equilibrium Reactor model predictions. Commercial Ni-based catalysts were tested (G-90 B5 and G 56B from C&CS). These catalysts were capable of significantly reducing CH4 content, by promoting reforming reactions. At the experimental conditions used and in absence of steam, G 56B seems to be more effective in CH4 conversion, as lower CH4 contents were obtained. In presence of steam both catalysts were capable of completely destroying CH4. Both catalysts also promoted WGS (water gas shift) reaction to some extent, though they are not specific catalysts for this reaction. Thus, a high increase in H2 content was observed, due to its formation by both reforming and WGS reactions. For a complete conversion of CO into CO2 and H2 a specific catalyst for WGS reaction is still needed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 90, Issue 4, April 2011, Pages 1645-1654
Journal: Fuel - Volume 90, Issue 4, April 2011, Pages 1645-1654
نویسندگان
Filomena Pinto, Rui Neto André, Carlos Franco, Ricardo Costa, Ibrahim Gulyurtlu,