Thermally stable cross-linked P84 with superior membrane H2/CO2 separation properties at 100 °C

Omidvar, Maryam; Stafford, Christopher M.; Lin, Haiqing

doi:10.1016/j.memsci.2019.01.003

Title: Thermally stable cross-linked P84 with superior membrane H₂/CO₂ separation properties at 100 °C

Abstract

Polymers with a strong size-sieving ability and superior H₂/CO₂ selectivity at 100 °C or above are of great interests for pre-combustion CO₂ capture. Polyimides (such as Matrimid and 6FDA-durene) have been cross-linked using diamines and show superior H₂/CO₂ selectivity. However, these cross-linked polymers cannot be used for the pre-combustion CO₂ capture because of the lack of thermal stability at 100 °C. As such, herein we demonstrate that commercial P84™ can be chemically cross-linked using 1,4-butanediamine (BuDA) to achieve robust H₂/CO₂ separation properties at 100–150 °C. The cross-linked P84 were thoroughly evaluated using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The effects of the cross-linking time on the physical properties and H₂/CO₂ separation properties at various temperatures were determined and interpreted using a free volume model. An exemplary sample based on P84 cross-linked by BuDA for 6 h exhibits a H₂ permeability of 47 Barrers (1 Barrer = 3.35 × 10^–16 mol m/m² s Pa) and H₂/CO₂ selectivity of 14 at 100 °C, which is on the Robeson's upper bound, indicating their potential for practical applications.

Authors:

Omidvar, Maryam ^[1]; Stafford, Christopher M. ^[2]; Lin, Haiqing ^[1]

Univ. at Buffalo, NY (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)

Publication Date:: Sun Jan 06 00:00:00 EST 2019

Research Org.:: Univ. at Buffalo, NY (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE); National Science Foundation (NSF)

OSTI Identifier:: 1659661

Grant/Contract Number:: FE0026463; 1554236

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Membrane Science

Additional Journal Information:: Journal Volume: 575; Journal ID: ISSN 0376-7388

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 20 FOSSIL-FUELED POWER PLANTS; P84; Cross-linking; Membranes; H2/CO2 separation; Diamine

Citation Formats


                    Omidvar, Maryam, Stafford, Christopher M., and Lin, Haiqing. Thermally stable cross-linked P84 with superior membrane H2/CO2 separation properties at 100 °C.  United States: N. p., 2019. 
Web.  doi:10.1016/j.memsci.2019.01.003.

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                    Omidvar, Maryam, Stafford, Christopher M., & Lin, Haiqing. Thermally stable cross-linked P84 with superior membrane H2/CO2 separation properties at 100 °C.  United States.  https://doi.org/10.1016/j.memsci.2019.01.003

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                    Omidvar, Maryam, Stafford, Christopher M., and Lin, Haiqing. Sun .  
"Thermally stable cross-linked P84 with superior membrane H2/CO2 separation properties at 100 °C".  United States.  https://doi.org/10.1016/j.memsci.2019.01.003.  https://www.osti.gov/servlets/purl/1659661.

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@article{osti_1659661,

  title        = {Thermally stable cross-linked P84 with superior membrane H2/CO2 separation properties at 100 °C},

  author       = {Omidvar, Maryam and Stafford, Christopher M. and Lin, Haiqing},

  abstractNote = {Polymers with a strong size-sieving ability and superior H2/CO2 selectivity at 100 °C or above are of great interests for pre-combustion CO2 capture. Polyimides (such as Matrimid and 6FDA-durene) have been cross-linked using diamines and show superior H2/CO2 selectivity. However, these cross-linked polymers cannot be used for the pre-combustion CO2 capture because of the lack of thermal stability at 100 °C. As such, herein we demonstrate that commercial P84™ can be chemically cross-linked using 1,4-butanediamine (BuDA) to achieve robust H2/CO2 separation properties at 100–150 °C. The cross-linked P84 were thoroughly evaluated using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The effects of the cross-linking time on the physical properties and H2/CO2 separation properties at various temperatures were determined and interpreted using a free volume model. An exemplary sample based on P84 cross-linked by BuDA for 6 h exhibits a H2 permeability of 47 Barrers (1 Barrer = 3.35 × 10–16 mol m/m2 s Pa) and H2/CO2 selectivity of 14 at 100 °C, which is on the Robeson's upper bound, indicating their potential for practical applications.},

  doi          = {10.1016/j.memsci.2019.01.003},

  journal      = {Journal of Membrane Science},

  number       = ,

  volume       = 575,

  place        = {United States},

  year         = {Sun Jan 06 00:00:00 EST 2019},

  month        = {Sun Jan 06 00:00:00 EST 2019}

}

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Works referenced in this record:

Selective Gas Transport Through Few-Layered Graphene and Graphene Oxide Membranes
journal, October 2013

Kim, Hyo Won; Yoon, Hee Wook; Yoon, Seon-Mi
Science, Vol. 342, Issue 6154, p. 91-95
DOI: 10.1126/science.1236098

Ultrathin, Molecular-Sieving Graphene Oxide Membranes for Selective Hydrogen Separation
journal, October 2013

Li, Hang; Song, Zhuonan; Zhang, Xiaojie
Science, Vol. 342, Issue 6154, p. 95-98
DOI: 10.1126/science.1236686

Unprecedented size-sieving ability in polybenzimidazole doped with polyprotic acids for membrane H ₂ /CO ₂ separation
journal, January 2018

Zhu, Lingxiang; Swihart, Mark T.; Lin, Haiqing
Energy & Environmental Science, Vol. 11, Issue 1
DOI: 10.1039/C7EE02865B

Plasticization-Enhanced Hydrogen Purification Using Polymeric Membranes
journal, February 2006

Lin, H.
Science, Vol. 311, Issue 5761
DOI: 10.1126/science.1118079

Carbon dioxide capture with membranes at an IGCC power plant
journal, February 2012

Merkel, Tim C.; Zhou, Meijuan; Baker, Richard W.
Journal of Membrane Science, Vol. 389
DOI: 10.1016/j.memsci.2011.11.012

Polymeric membranes for the hydrogen economy: Contemporary approaches and prospects for the future
journal, February 2009

Shao, Lu; Low, Bee Ting; Chung, Tai-Shung
Journal of Membrane Science, Vol. 327, Issue 1-2
DOI: 10.1016/j.memsci.2008.11.019

Polybenzimidazole composite membranes for high temperature synthesis gas separations
journal, October 2012

Berchtold, Kathryn A.; Singh, Rajinder P.; Young, Jennifer S.
Journal of Membrane Science, Vol. 415-416
DOI: 10.1016/j.memsci.2012.05.005

50th Anniversary Perspective : Polymers and Mixed Matrix Membranes for Gas and Vapor Separation: A Review and Prospective Opportunities
journal, October 2017

Galizia, Michele; Chi, Won Seok; Smith, Zachary P.
Macromolecules, Vol. 50, Issue 20
DOI: 10.1021/acs.macromol.7b01718

Polybenzimidazole based random copolymers containing hexafluoroisopropylidene functional groups for gas separations at elevated temperatures
journal, June 2017

Singh, Rajinder P.; Li, Xin; Dudeck, Kevin W.
Polymer, Vol. 119
DOI: 10.1016/j.polymer.2017.04.075

Tightening polybenzimidazole (PBI) nanostructure via chemical cross-linking for membrane H ₂ /CO ₂ separation
journal, January 2017

Zhu, Lingxiang; Swihart, Mark T.; Lin, Haiqing
Journal of Materials Chemistry A, Vol. 5, Issue 37
DOI: 10.1039/C7TA03874G

Ultra-selective defect-free interfacially polymerized molecular sieve thin-film composite membranes for H ₂ purification
journal, January 2018

Ali, Z.; Pacheco, F.; Litwiller, E.
Journal of Materials Chemistry A, Vol. 6, Issue 1
DOI: 10.1039/C7TA07819F

Comparison of diamino cross-linking in different polyimide solutions and membranes by precipitation observation and gas transport
journal, April 2008

Shao, Lu; Liu, Li; Cheng, Si-Xue
Journal of Membrane Science, Vol. 312, Issue 1-2
DOI: 10.1016/j.memsci.2007.12.060

Effects of cross-linking modification on gas separation performance of Matrimid membranes
journal, November 2003

Tin, P.
Journal of Membrane Science, Vol. 225, Issue 1-2
DOI: 10.1016/j.memsci.2003.08.005

Effects of Thermal Treatments and Dendrimers Chemical Structures on the Properties of Highly Surface Cross-Linked Polyimide Films
journal, April 2005

Xiao, Youchang; Shao, Lu; Chung, Tai-Shung
Industrial & Engineering Chemistry Research, Vol. 44, Issue 9
DOI: 10.1021/ie048837g

Surface Modification of Polyimide Membranes by Diamines for H2 and CO2 Separation
journal, July 2006

Chung, Tai-Shung; Shao, Lu; Tin, Pei Shi
Macromolecular Rapid Communications, Vol. 27, Issue 13
DOI: 10.1002/marc.200600147

Simultaneous Occurrence of Chemical Grafting, Cross-Linking, and Etching on the Surface of Polyimide Membranes and Their Impact on H ₂ /CO ₂ Separation
journal, February 2008

Low, Bee Ting; Xiao, Youchang; Chung, Tai Shung
Macromolecules, Vol. 41, Issue 4
DOI: 10.1021/ma702360p

A novel strategy for surface modification of polyimide membranes by vapor-phase ethylenediamine (EDA) for hydrogen purification
journal, October 2009

Shao, Lu; Lau, Cher-Hon; Chung, Tai-Shung
International Journal of Hydrogen Energy, Vol. 34, Issue 20
DOI: 10.1016/j.ijhydene.2009.07.115

Using iron (III) acetylacetonate as both a cross-linker and micropore former to develop polyimide membranes with enhanced gas separation performance
journal, September 2014

Chua, Mei Ling; Xiao, Youchang; Chung, Tai-Shung
Separation and Purification Technology, Vol. 133
DOI: 10.1016/j.seppur.2014.06.039

Physical aging and plasticization of thick and thin films of the thermally rearranged ortho-functional polyimide 6FDA–HAB
journal, May 2014

Wang, Huan; Chung, Tai-Shung; Paul, Donald R.
Journal of Membrane Science, Vol. 458
DOI: 10.1016/j.memsci.2014.01.066

Molecularly Tuned Free Volume of Vapor Cross-Linked 6FDA-Durene/ZIF-71 MMMs for H ₂ /CO ₂ Separation at 150 °C
journal, November 2016

Japip, Susilo; Liao, Kuo-Sung; Chung, Tai-Shung
Advanced Materials, Vol. 29, Issue 4
DOI: 10.1002/adma.201603833

In-line formation of chemically cross-linked P84® co-polyimide hollow fibre membranes for H2/CO2 separation
journal, December 2010

Choi, Seung-Hak; Jansen, Johannes C.; Tasselli, Franco
Separation and Purification Technology, Vol. 76, Issue 2
DOI: 10.1016/j.seppur.2010.09.031

Surface modification of polyimide membranes by diethylenetriamine (DETA) vapor for H2 purification and moisture effect on gas permeation
journal, March 2013

Wang, Huan; Paul, Donald R.; Chung, Tai-Shung
Journal of Membrane Science, Vol. 430
DOI: 10.1016/j.memsci.2012.12.008

Amplifying the molecular sieving capability of polyimide membranes via coupling of diamine networking and molecular architecture
journal, July 2009

Low, Bee Ting; Xiao, Youchang; Chung, Tai Shung
Polymer, Vol. 50, Issue 14
DOI: 10.1016/j.polymer.2009.04.059

A vapor-phase surface modification method to enhance different types of hollow fiber membranes for industrial scale hydrogen separation
journal, September 2010

Lau, Cher Hon; Low, Bee Ting; Shao, Lu
International Journal of Hydrogen Energy, Vol. 35, Issue 17
DOI: 10.1016/j.ijhydene.2010.06.013

Reversible diamine cross-linking of polyimide membranes
journal, March 2007

Powell, Clem E.; Duthie, Xavier J.; Kentish, Sandra E.
Journal of Membrane Science, Vol. 291, Issue 1-2
DOI: 10.1016/j.memsci.2007.01.016

The effects of 1,3-cyclohexanebis(methylamine) modification on gas transport and plasticization resistance of polyimide membranes
journal, December 2005

Shao, L.; Chung, T.; Goh, S.
Journal of Membrane Science, Vol. 267, Issue 1-2
DOI: 10.1016/j.memsci.2005.06.004

Hybrid polymer/MOF membranes for Organic Solvent Nanofiltration (OSN): Chemical modification and the quest for perfection
journal, April 2016

Campbell, James; Burgal, Joao Da Silvao; Szekely, Gyorgy
Journal of Membrane Science, Vol. 503
DOI: 10.1016/j.memsci.2016.01.024

Polymeric membranes for nanofiltration in polar aprotic solvents
journal, September 2007

See Toh, Y. H.; Lim, F. W.; Livingston, A. G.
Journal of Membrane Science, Vol. 301, Issue 1-2
DOI: 10.1016/j.memsci.2007.06.034

Diamine modification of P84 polyimide membranes for pervaporation dehydration of isopropanol
journal, January 2006

Qiao, Xiangyi; Chung, Tai-Shung
AIChE Journal, Vol. 52, Issue 10
DOI: 10.1002/aic.10964

Cellulose triacetate doped with ionic liquids for membrane gas separation
journal, April 2016

Lam, Benjamin; Wei, Min; Zhu, Lingxiang
Polymer, Vol. 89
DOI: 10.1016/j.polymer.2016.02.033

Physical aging of glassy perfluoropolymers in thin film composite membranes. Part I. Gas transport properties
journal, March 2017

Yavari, Milad; Le, Tho; Lin, Haiqing
Journal of Membrane Science, Vol. 525
DOI: 10.1016/j.memsci.2016.07.002

Sorption and transport of linear alkane hydrocarbons in biaxially oriented polyethylene terephthalate
journal, January 2001

Dhoot, S. N.; Freeman, B. D.; Stewart, M. E.
Journal of Polymer Science Part B: Polymer Physics, Vol. 39, Issue 11
DOI: 10.1002/polb.1092

Pervaporation dehydration of acetone using P84 co-polyimide flat sheet membranes modified by vapor phase crosslinking
journal, May 2014

Mangindaan, Dave W.; Min Shi, Gui; Chung, Tai-Shung
Journal of Membrane Science, Vol. 458
DOI: 10.1016/j.memsci.2014.01.030

Chemically cross-linkable polyimide membranes for improved transport plasticization resistance for natural gas separation
journal, February 2015

Eguchi, Hiroshi; Kim, Danny J.; Koros, William J.
Polymer, Vol. 58
DOI: 10.1016/j.polymer.2014.12.064

Influence of temperature on the upper bound: Theoretical considerations and comparison with experimental results
journal, September 2010

Rowe, Brandon W.; Robeson, Lloyd M.; Freeman, Benny D.
Journal of Membrane Science, Vol. 360, Issue 1-2
DOI: 10.1016/j.memsci.2010.04.047

Works referencing / citing this record:

Fabrication of Defect-Free P84® Polyimide Hollow Fiber for Gas Separation: Pathway to Formation of Optimized Structure
journal, December 2019

Etxeberria-Benavides, Miren; Karvan, Oguz; Kapteijn, Freek
Membranes, Vol. 10, Issue 1
DOI: 10.3390/membranes10010004

Fabrication of Defect-Free P84® Polyimide Hollow Fiber for Gas Separation: Pathway to Formation of Optimized Structure
journal, December 2019

Etxeberria-Benavides, Miren; Karvan, Oguz; Kapteijn, Freek
Membranes, Vol. 10, Issue 1
DOI: 10.3390/membranes10010004

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Title: Thermally stable cross-linked P84 with superior membrane H2/CO2 separation properties at 100 °C

Abstract

Citation Formats

Selective Gas Transport Through Few-Layered Graphene and Graphene Oxide Membranes journal, October 2013

Ultrathin, Molecular-Sieving Graphene Oxide Membranes for Selective Hydrogen Separation journal, October 2013

Unprecedented size-sieving ability in polybenzimidazole doped with polyprotic acids for membrane H 2 /CO 2 separation journal, January 2018

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Carbon dioxide capture with membranes at an IGCC power plant journal, February 2012

Polymeric membranes for the hydrogen economy: Contemporary approaches and prospects for the future journal, February 2009

Polybenzimidazole composite membranes for high temperature synthesis gas separations journal, October 2012

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Polybenzimidazole based random copolymers containing hexafluoroisopropylidene functional groups for gas separations at elevated temperatures journal, June 2017

Tightening polybenzimidazole (PBI) nanostructure via chemical cross-linking for membrane H 2 /CO 2 separation journal, January 2017

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