کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5116722 1378105 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of pCO2 on direct flue gas mineral carbonation at pilot scale
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Effect of pCO2 on direct flue gas mineral carbonation at pilot scale
چکیده انگلیسی


- Pilot scale mineral carbonation process study using a real cement plant flue gas.
- The effect of the CO2 partial pressure and the use of raw water were addressed.
- The gas composition variation can affect the carbonation efficiency.
- The use of a raw water did not impact the overall process efficiency.

Concerns about global warming phenomena induced the development of research about the control of anthropogenic greenhouse gases emissions. The current work studies on the scaling up of aqueous mineral carbonation route to reduce the CO2 emissions at the chimney of industrial emitters. The reactivity of serpentinite in a stirred tank reactor was studied for several partial pressures of CO2 (pCO2) (0.4, 0.7, 1.3 and 1.6 bar). Prior to carbonation, the feedstock was finely grinded and dehydroxyled at 650 °C by a thermal treatment. The major content of magnetite was removed (7.5 wt% · total weight−1). Experiments were carried out under batch mode at room temperature using real cement plant flue gas (14-18 vol% CO2) and open pit drainage water. The effect of the raw water and the pCO2 on the carbonation efficiency was measured. First, the main results showed a positive effect of the quarry water as a slight enhancement of the Mg leaching in comparison with distilled water. Secondly, a pCO2 of 1.3 bar was the optimal working pressure which provided the highest efficiency of the carbonation reaction (0.8 gCO2 · g residue−1). Precipitation rates of dissolved CO2 ranged from 7% to 33%. Pure precipitate was obtained and essentially composed of Nesquehonite. At a pCO2 of 1.3 bar, additional physical retreatment of the solid material after being contacted with 6 batches of gas enhanced considerably mineral carbonation efficiency (0.17 gCO2 · g residue−1.).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 198, Part 1, 1 August 2017, Pages 1-8
نویسندگان
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