Chen J Zhang

US Patent:

20170189866, Jul 6, 2017

Filed:

May 26, 2015

Appl. No.:

15/313121

Inventors:

- Atlanta GA, US
Chen Zhang - Atlanta GA, US

International Classification:

B01D 71/64
B01D 69/08
B01D 69/12
B01D 71/56
C08G 73/10
B29C 47/06
B29C 47/08
D01D 1/02
D01D 5/24
D01F 6/74
B01D 69/14
B29C 47/00

Abstract:

Provided herein are metal organic framework/polymer mixed-matrix hollow fiber membranes and metal organic framework/carbon molecular sieve mixed-matrix hollow fiber membranes. The materials have high MOF particle loading and are easily scalable. The MOF/polymer mixed-matrix hollow fibers are formed using a dry-jet/wet-quench fiber spinning technique and show CH/CHselectivity that is significantly enhanced over the pure polymer fiber and that is consistent with the selectivity of mixed-matrix dense films of the same MOF/polymer combination. The MOF/CMS mixed-matrix hollow fibers are formed by pyrolyzing the MOF/polymer mixed-matrix hollow fibers and show increased CHpermeance and increased selectivity over the MOF/polymer mixed-matrix hollow fiber membranes.

US Patent:

20160346740, Dec 1, 2016

Filed:

Jun 1, 2016

Appl. No.:

15/170529

Inventors:

- Atlanta GA, US
Chen Zhang - Atlanta GA, US

International Classification:

B01D 71/02
B01D 53/22
B01D 67/00

Abstract:

Embodiments of the present disclosure are directed to a process for making a carbon molecular sieve membrane having a desired permselectivity between a first gas species and a second gas species, in which the second gas species has a larger kinetic diameter than the first gas species. The process comprises providing a polymer precursor and pyrolyzing the polymer precursor at a pyrolysis temperature that is effective to selectively reduce the sorption coefficient of the second gas species, thereby increasing the permselectivity of the resulting carbon molecular sieve membrane.