کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7019727 | 1455936 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Silver-doped strontium niobium cobaltite as a new perovskite-type ceramic membrane for oxygen separation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Silver-doped strontium niobium cobaltite as a new perovskite-type ceramic membrane for oxygen separation Silver-doped strontium niobium cobaltite as a new perovskite-type ceramic membrane for oxygen separation](/preview/png/7019727.png)
چکیده انگلیسی
In this work, we report the silver doping as a novel strategy for developing single-phase mixed conducting ceramic membranes with perovskite-type structure for the efficient oxygen separation from air. Specifically, perovskite-type oxide with a nominal composition of Sr0.95Ag0.05Co0.9Nb0.1O3-δ (SANC) was designed, synthesized and investigated, and a comparative study with the Ag-free SrCo0.9Nb0.1O3-δ (SNC) perovskite-type membrane was also conducted. The incorporation of silver into the perovskite lattice of SNC has been confirmed even after the sintering at 1175â¯Â°C using Ag2O as the silver source. An improved sintering feature, enhanced mechanical strength, and an increased electrical conductivity of the SANC membrane when compared to the Ag-free SNC have been observed. Furthermore the chemical bulk diffusion and surface exchange coefficients increased through the silver doping. Above all higher oxygen permeation fluxes were achieved for the SANC membrane when compared with the SNC membrane under the corresponding conditions. Therefore, SANC turned out to be a highly promising ceramic membrane material for oxygen separation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 563, 1 October 2018, Pages 617-624
Journal: Journal of Membrane Science - Volume 563, 1 October 2018, Pages 617-624
نویسندگان
Zhenbao Zhang, Xiaomin Xu, Junxing Zhang, Dengjie Chen, Dahai Zeng, Shaomin Liu, Wei Zhou, Zongping Shao,