کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6591949 | 456882 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
CO2-tolerant alkaline-earth metal-free single phase membrane for oxygen separation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A novel CO2-tolerant alkaline-earth metal-free single phase membrane based on (Nd0.9La0.1)2Ni0.74Cu0.21Ga0.05O4+δ (NLNCG) was successfully prepared though a sol-gel route. The oxygen permeation and the stability of the NLNCG under CO2 are investigated in detail. At 975 °C, when helium is used as the sweep gas, the oxygen permeation flux of 0.53 ml/min cm2 (STP) is obtained. When the sweep gas is changed from helium to CO2, the oxygen permeation flux is reduced to 0.48 ml/min cm2 (STP). Only a slight decrease of the oxygen permeation flux through the NLNCG membrane is observed. During the 420 h operation with CO2 as the sweep gas at 975 °C, a steady oxygen permeation flux through the NLNCG membrane of 0.53 ml/(min cm2) is obtained. From XRD and SEM characterizations, it is found that the spent membrane still maintains the perfect K2NiF4-type phase structure and intact microstructure without any carbonate indicating that the NLNCG membrane shows an excellent stability under CO2 atmosphere.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 101, 20 September 2013, Pages 240-247
Journal: Chemical Engineering Science - Volume 101, 20 September 2013, Pages 240-247
نویسندگان
Qin Zheng, Jian Xue, Qing Liao, Yanying Wei, Zhong Li, Haihui Wang,