کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1732708 1521481 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Factors affecting the precipitation of pure calcium carbonate during the direct aqueous carbonation of flue gas desulfurization gypsum
ترجمه فارسی عنوان
عوامل موثر بر بارش کربنات کلسیم خالص در طی کربنات آبی مستقیم از گچ سولفوریزاسیون دودکش
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی


• Pure and white CaCO3 was synthesized using induction period during direct carbonation of FGD gypsum.
• Its formation efficiency was increased with ammonia content but decreased with solid-to-liquid ratio.
• This method is expected to extend to other industrial CO2 sequestration for the enhanced economic value of precipitated CaCO3.

The mineral carbonation of FGD (flue gas desulfurization) gypsum was carried out through CO2 sorption into ammonia solution containing FGD gypsum. High-purity calcium carbonate was precipitated from DCC (dissolved calcium carbonate) solution which was extracted during the induction period. The factors affecting the preparation of pure calcium carbonate were examined under the following conditions: CO2 flow rate (1–3 L/min), ammonia content (4–12%), and S/L (solid-to-liquid) ratio (5–300 g/L). X-Ray diffraction study revealed that the PCC (precipitated calcium carbonate) was round-shaped vaterite. The induction time for PCC decreased as the CO2 flow rate increased. The maximum formation efficiency for pure PCC was seen to increase linearly with the ammonia content. The formation efficiency for pure PCC was the highest (90%) for S/L ratio of 5 g/L but it decreased as S/L ratio increased. On the other hand, S/L ratio didn't affect the maximum solubility limit of DCC. It is believed that the pure PCC would add an economic value to the FGD gypsum carbonation for industrial CO2 sequestration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 65, 1 February 2014, Pages 527–532
نویسندگان
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