کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6687322 | 501878 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A perspective on gaseous biofuel production from micro-algae generated from CO2 from a coal-fired power plant
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
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چکیده انگلیسی
There are significant resources of coal on the planet. It is likely that a lot of this coal will be combusted. A 1Â GWe coal power plant operating at 35% electrical efficiency and a capacity factor of 75% produces 6.77 million tonnes of CO2 per annum. A closed cultivation system with a carbon capture efficiency of 80% allows production of 2.69Â Mt of micro-algal (volatile solids), in a foot print of 19,200Â ha for a tubular photo-bioreactor (PBR) and 34,000Â ha for a Flat Plate PBR. An open system (raceway pond) at a carbon capture efficiency of 50% produces 1.68Â Mt of micro-algal (volatile solids) and requires a footprint of 52,303Â ha. Employing a three stage sequential process (combining dark fermentation, photo fermentation and anaerobic digestion) to produce bio-hydrogen and bio-methane from the micro-algae could potentially generate 35% of the primary energy in the coal in the form of renewable gaseous fuel if a closed system of cultivation is used. This is sufficient to fuel 600,000 cars per annum. In the cultivation of micro-algae, pumping and circulation is a considerable parasitic energy demand. The ratio of energy output (gaseous biofuel) to energy input (pumping and circulation) is less than 1 for all the three cultivation systems assessed, ranging from 0.71 for raceway ponds to 0.05 for a tubular PBR. If coal powered electricity is the source of this parasitic energy then a tubular PBR system produces more CO2 than the CO2 captured by the micro-algae.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 148, 15 June 2015, Pages 396-402
Journal: Applied Energy - Volume 148, 15 June 2015, Pages 396-402
نویسندگان
Amita Jacob, Ao Xia, Jerry D. Murphy,