کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7159322 1462805 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design concept for coal-based polygeneration processes of chemicals and power with the lowest energy consumption for CO2 capture
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Design concept for coal-based polygeneration processes of chemicals and power with the lowest energy consumption for CO2 capture
چکیده انگلیسی
Single coal based chemicals production processes emit large amount of CO2 during conversion of the syngas to the high H2/CO ratio feed gas for chemicals synthesis. However, the feed gas is with a low CO2 molar fraction, leading to high energy cost for CO2 capture. In this work, we try to reduce energy consumption for CO2 capture by improving its molar fraction. A new methanol and power polygeneration process is designed and analysed based on process modeling and simulation. The hierarchical conceptual design methodology is introduced to design the polygeneration more reasonably. In this process, the shifted syngas exiting from the water gas shift unit first goes into the CO2 capture unit to remove CO2. Then, the purified H2-rich syngas is mixed with the unshifted syngas and fed into the methanol synthesis to produce methanol. Then, unreacted syngas out from the methanol synthesis unit is moderately recycled to use, while the rest is used to generate power. Energy consumption for CO2 capture of the polygeneration process is 0.7 GJ/t-CO2, which is a 40.6% reduction compared to that of the single coal-to-methanol process and a 22.2% reduction to that of coal-to-hydrogen for power generation process. Techno-economic analysis shows that energy saving ratio and primary cost saving ratio are 16.5% and 13.2%, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 157, 1 February 2018, Pages 186-194
نویسندگان
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