کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1418424 | 986001 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modification of macroporous stainless steel supports with silica nanoparticles for size selective carbon membranes with improved flux
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
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چکیده انگلیسی
Silica nanoparticles were slip cast into porous stainless steel supports, which were then coated with polyfurfuryl alcohol and pyrolyzed to make nanoporous carbon membranes. The single gas permeances of the membranes formed on modified stainless steel supports were found to be between two and three orders of magnitude larger than the permeances of nanoporous carbon membranes (<10â11 mol mâ2 sâ1 Paâ1) synthesized on unmodified supports. Importantly, these high permeances (10â8-10â9 mol mâ2 sâ1 Paâ1) were achieved within the same range of O2/N2 selectivities (3-5) that we have observed for single gases permeating at much lower fluxes through the nanoporous carbon membranes on unmodified supports. The nanoporous carbon membranes also were formed by combining the silica nanoparticles with polyfurfuryl alcohol resin and applying the mixture directly onto an unmodified support. This simpler process was as effective in producing selective-high permeance membranes. In both cases the significant increase in permeance without loss of selectivity is attributed to the silica nanoparticles filling the macropores of the stainless steel supports, thereby leading to the formation of very thin but selective carbon layers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 44, Issue 10, August 2006, Pages 2051-2058
Journal: Carbon - Volume 44, Issue 10, August 2006, Pages 2051-2058
نویسندگان
Ramakrishnan Rajagopalan, Anna Merritt, Anna Tseytlin, Henry C. Foley,