کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5484982 | 1522997 | 2017 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adsorption of carbon dioxide, nitrogen and methane on modified titanosilicate type molecular sieves
ترجمه فارسی عنوان
جذب دی اکسید کربن، نیتروژن و متان در غربال مولکولی نوع تیتونسیلیکات
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کلمات کلیدی
جذب، جداسازی، ارتقاء گاز طبیعی، دی اکسید کربن، نیتروژن، تیتان اسیدیته، مبادله ایون،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
Separation of N2 and CO2 from methane is a vital step in natural gas refining processes. The adsorption of carbon dioxide, nitrogen and methane was studied and compared on modified titanosilicate molecular sieves ETS-10 (cation exchanged forms of ETS-10 involving Na-ETS-10, Ag-ETS-10 and Ba-ETS-10) as a packed bed adsorbent. The synthesized ETS-10 was characterized by SEM for crystal structure, powder X-ray diffraction for the phase structure and BET for the pore textural properties. The adsorption equilibrium isotherms of CO2, N2 and CH4 on the adsorbents were measured at 277, 298, and 310Â K and pressures up to 10Â bar. The experimental adsorption equilibrium isotherms were well described by the UNILAN equation. Breakthrough curves were measured for the fixed bed. Na-ETS-10 is found to have selectivity 5.72 for CO2 over methane and 1.09 for N2 over methane at 277Â K and 1000Â kPa in Henry's law regime. For Ag-ETS-10 selectivity of CO2/CH4 is 4.86 and for N2/CH4 is 1.49. Finally, Ba-ETS-10 has been found to be a better adsorbent for the removal of impurity from methane with selectivity 8.37 for CO2/CH4 and 1.24 for N2/CH4. The selectivity increased with pressure in all cases studied, especially for Barium exchanged form. The packing efficiency of the bed was increased through granule size decrease from 4Â mm to 2Â mm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Natural Gas Science and Engineering - Volume 46, October 2017, Pages 730-737
Journal: Journal of Natural Gas Science and Engineering - Volume 46, October 2017, Pages 730-737
نویسندگان
Rasoul Neishabori Salehi, Farshad Rahimpour, Sahram Sharifnia,