کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
235109 465628 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of steam addition to the calciner in a calcium looping pilot plant
ترجمه فارسی عنوان
اثر افزودن بخار به کالسینر در یک کارخانه آزمایشی حلقه کلسیم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Post-combustion CO2 capture was demonstrated by Ca-based sorbent looping.
• Experiments in a 100 kWth calcium looping pilot-scale dual-fluid bed system.
• CO2-rich atmospheres inside calcination were achieved by oxy-fired biomass.
• The effect of steam addition injected into calciner was investigated.
• Steam addition enhanced sorbent performance and reduced make-up rates.

Calcium looping is a post-combustion carbon capture technology which uses natural limestone as a sorbent. The carrying capacity of the natural limestone, as a CO2 sorbent, decays with each calcination/carbonation cycle. Steam has been shown to decrease the carrying capacity decay and can also be used to reactivate spent sorbent. A testing campaign with continuous CO2 capture and various levels of steam in the oxy-fired calciner was completed in a 100 kWth dual-fluidized bed pilot plant. The calciner was operated with steam concentrations of 0 vol.%, 15 vol.% and 65 vol.% at the inlet of the windbox and at 850 °C and 910 °C at the highest steam concentration. The increase in steam in the calciner decreased the fresh sorbent make-up requirement; for instance a 78% reduction in the make-up was required with 65 vol.% steam in the calciner relative to the no-steam case. Reducing the temperature of calcination with 65 vol.% steam did not further reduce the make-up requirement. The decreased decay in sorbent carrying capacity was attributed to a stable pore structure resulting from the increase in steam concentration and the corresponding reduction of the CO2 concentration in the calciner. The reduced CO2-induced sintering resulted in an increased surface area and pore volume which was stable over many calcination/carbonation cycles.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 290, March 2016, Pages 114–123
نویسندگان
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