High Temperature Polybenzimidazole Hollow Fiber Membranes for Hydrogen Separation and Carbon Dioxide Capture from Synthesis Gas

Singh, Rajinder; Dahe, Ganpat J.; Dudeck, Kevin W.; Welch, Cynthia F.; Berchtold, Kathryn A.

doi:10.1016/j.egypro.2014.11.015

Cited by 30 publications

(20 citation statements)

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“…28e30, 32 In these studies, the modified PBIs exhibited slightly decreased thermal stabilities and improved organo-solubilities compared to m-PBI. 40,41 A major aspect of PBI hollow fiber membrane development work involves developing the capability, materials, and methods, to realize a high-area-density membrane platform with a thin selective layer and a mechanically robust porous support sublayer and testing those fibers for permselectivity character in simulated and ultimately real process environments. The H 2 /CO 2 permeabilityeselectivity performance combinations at nearambient and elevated temperature for m-PBI and novel PBI chemistries in comparison to other polymeric materials evaluated for this application are presented in Figure 3.…”

Section: Organic Polymer Membranesmentioning

confidence: 99%

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H2 Selective Membranes for Precombustion Carbon Capture

Singh¹,

Berchtold²

2015

Novel Materials for Carbon Dioxide Mitigation Technology

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Section: Organic Polymer Membranesmentioning

confidence: 99%

“…(a) whole fiber cross-section; (b) one side cross-section; and (c) outer selective layer and underlying support structure 40. (a) whole fiber cross-section; (b) one side cross-section; and (c) outer selective layer and underlying support structure 40.…”

mentioning

confidence: 99%

H2 Selective Membranes for Precombustion Carbon Capture

Singh¹,

Berchtold²

2015

Novel Materials for Carbon Dioxide Mitigation Technology

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“…Under extreme diligence, supported dense PBI membranes have been developed for syngas gas applications, and these membranes have shown extraordinary H 2 /CO 2 selectivity up to 40 at 250ºC; however, PBI's stability as thin-film membranes are a problem that requires further development. [14,20,45] In summary, many of the issues associated with formation and use of PBI membranes are a result of additives. In this paper, we report a new PBI polymer blend that produces thin-films without the need for additives.…”

Section: Introductionmentioning

confidence: 99%

Blended polybenzimidazole and melamine-co-formaldehyde thermosets

Klaehn

Orme

Peterson

2016

Journal of Membrane Science

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Polybenzimidazole [PBI; poly-2,2'(m-phenylene)-5,5'-bibenzimidazole] is known to have excellent high temperature stability (up to 450 ºC) and superb H 2 /CO 2 selectivity compared to most high performance (HP) polymers. New blended thermosets were made with PBI and poly(melamine co-formaldehyde) [PMF] to produce stable thin-films after thermal processing at 220-250 ºC. PBI film formation is difficult, because of challenging processing techniques. As a result, the film tends to fracture and fissure due to processing aids and stabilizers (salt/acid additives) that are found in PBI solutions above 10 weight percent. Therefore, PBI dense thinfilms are fragile and prone to fracturing during film processing. The reported PBI-PMF blended thermosets do not have stabilizers, and can be made into dense thin-films. The PBI-PMF films were analyzed using pure and mixed gas permeability measurement techniques. At 250 °C, the © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ data show H 2 /CO 2 gas selectivities greater than 13. Also from the gas permeation data, the energy of activation (Ep) of a mixed gas stream for PBI-PMF shows that hydrogen permeates more easily than the other gases, while the permeabilities for the larger kinetic diameter gases are greatly diminished. In addition, the FT-IR spectra show that the PBI-PMF films have changed from parent PBI after thermal processing, and PMF dominates the spectra even in minor percent compositions. Overall, the reported PBI-PMF thermoset films show good stability which can be used for high temperature gas separation.

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“…In this paper, we focus on a class of high-performance PBI-based H 2 -selective polymeric membranes utilizing their demonstrated separation performance characteristics in multiple platforms including flat sheet, tubular, and hollow fiber [5,7,10] for an assumed industrially relevant selective layer thickness range of 100-200 nm. Thus, the following membrane characteristics are used in this study:…”

Section: Membrane Modelingmentioning

confidence: 99%

“…However, the literature suggests a lack of studies on optimization of polymer-based MR configurations. Recent and continued development and demonstration of high performance polymers such as PBIs for potential use in challenging membrane separation environments, such as those encountered in the vicinity of the WGS reaction, presents an opportunity to derive a MR model for a system utilizing such H 2 -selective polymers and subsequently evaluate their potential in this challenging separations role [5,7,10]. This study is focused on H 2 -selective membranes due to their advantages over CO 2 -selective membranes in IGCC process schemes, as discussed by [11].…”

Section: Introduction and Prior Workmentioning

confidence: 99%

Modeling and Optimization of High-Performance Polymer Membrane Reactor Systems for Water–Gas Shift Reaction Applications

et al. 2016

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Abstract:In production of electricity from coal, integrated gasification combined cycle plants typically operate with conventional packed bed reactors for the water-gas shift reaction, and a Selexol process for carbon dioxide removal. Implementation of membrane reactors in place of these two process units provides advantages such as increased carbon monoxide conversion, facilitated CO 2 removal/sequestration and process intensification. Proposed H 2 -selective membranes for these reactors are typically of palladium alloy or ceramic due to their outstanding gas separation properties; however, on an industrial scale, the cost of such materials may become exorbitant. High-performance polymeric membranes, such as polybenzimidazoles (PBIs), present themselves as low-cost alternatives with gas separation properties suitable for use in such membrane reactors, given their significant thermal and chemical stability. In this work, the performance of a class of high-performance polymeric membranes is assessed for use in integrated gasification combined cycle (IGCC) units operated with carbon capture, subject to constraints on equipment and process streams. Several systems are considered for use with the polymeric membranes, including membrane reactors and permeative stage reactors. Based upon models developed for each configuration, constrained optimization problems are formulated which seek to more efficiently employ membrane surface area. From the optimization results, the limiting membrane parameter for achieving all carbon capture and H 2 production specifications for water-gas shift reactor applications is determined to be the selectivity, α H 2 {CO 2 , and thus a minimum value of this parameter which satisfies all the constraints is identified for each analyzed configuration. For a CO 2 capture value of 90%, this value is found to be α = 61 for the membrane reactor and the 3-stage permeative stage reactor and α = 62 for the 2-stage permeative stage reactor. The proposed systems approach has the potential to be employed to identify performance limitations associated with membrane materials to guide the development of future polymeric and other advanced materials with desired membrane characteristics for energy and environmental applications.

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High Temperature Polybenzimidazole Hollow Fiber Membranes for Hydrogen Separation and Carbon Dioxide Capture from Synthesis Gas

Cited by 30 publications

References 4 publications

H2 Selective Membranes for Precombustion Carbon Capture

H2 Selective Membranes for Precombustion Carbon Capture

Blended polybenzimidazole and melamine-co-formaldehyde thermosets

Modeling and Optimization of High-Performance Polymer Membrane Reactor Systems for Water–Gas Shift Reaction Applications

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