کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
633585 | 1456034 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
PdAu and PdAuAg composite membranes for hydrogen separation from synthetic water-gas shift streams containing hydrogen sulfide
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
Electroless deposition was used to fabricate Pd-23Au and Pd-20Au-13Ag (wt%) membranes on Pall AccuSep® ZROD supports. The weight gain compositions of each film were corroborated with XRF analysis, EDS and XRD after testing. The membranes were annealed in a H2 atmosphere at temperatures of 773Â K and higher. The Pd-20Au-13Ag alloy membrane had higher single-gas H2 permeability than a pure Pd membrane on a comparable support. In a mixture of 20Â ppm H2S in H2 at 689.5Â kPa feed pressure, the H2 permeance of the Pd-20Au-13Ag alloy membrane was less inhibited at 773Â K than 723 or 673Â K. Both membranes were tested in a sour WGS mixture containing 20Â ppm H2S. The Pd-23Au membrane had a 29% H2 flux inhibition at 773Â K and 1.1Â MPa feed pressure, which is one of the best reported for a composite PdAu alloy membrane in a feed gas containing H2S. Although the H2 permeance of the Pd-20Au-13Ag alloy membrane was reduced more than the Pd-23Au membrane, it had a higher absolute H2 permeance in the sour WGS mixture. Once the H2S was removed from the WGS feed gas, the H2 permeance recovered at least 97% of its original value before H2S exposure to both membranes at 673 and 773Â K. After H2S testing, sulfides were not detected using XRD.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 465, 1 September 2014, Pages 167-176
Journal: Journal of Membrane Science - Volume 465, 1 September 2014, Pages 167-176
نویسندگان
Amanda E. Lewis, Hongbin Zhao, Haseeba Syed, Colin A. Wolden, J. Douglas Way,