Relevant bibliographies by topics / Polybenzimidazole (PBI)

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Polybenzimidazole (PBI)'

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Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Polybenzimidazole (PBI)"

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Chung, Tai Shung, and Paul N. Chen. "Polybenzimidazole (PBI) and polyarylate blends." Journal of Applied Polymer Science 40, no. 78 (1990): 1209–22. http://dx.doi.org/10.1002/app.1990.070400711.

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Ahn, Su Min, Hwan Yeop Jeong, Jung-Kyu Jang, et al. "Polybenzimidazole/Nafion hybrid membrane with improved chemical stability for vanadium redox flow battery application." RSC Advances 8, no. 45 (2018): 25304–12. http://dx.doi.org/10.1039/c8ra03921f.

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Zeng, L., T. S. Zhao, L. An, G. Zhao, and X. H. Yan. "A high-performance sandwiched-porous polybenzimidazole membrane with enhanced alkaline retention for anion exchange membrane fuel cells." Energy & Environmental Science 8, no. 9 (2015): 2768–74. http://dx.doi.org/10.1039/c5ee02047f.

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Polybenzimidazole (PBI)-based membrane electrode assemblies are fabricated with a sandwiched-porous PBI as the membrane and a new catalyst structure using PBI-decorated reduced graphene oxide as the supporting material for anion exchange membrane fuel cells.
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Shedden, Devon, Kristen M. Atkinson, Ibrahim Cisse, et al. "UV Photo-Oxidation of Polybenzimidazole (PBI)." Technologies 8, no. 4 (2020): 52. http://dx.doi.org/10.3390/technologies8040052.

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Since polybenzimidazole (PBI) is often used in the aerospace industry, high-temperature fuel cells, and in redox flow batteries, this research investigated the surface modification of PBI film with 253.7 and 184.9 nm UV photo-oxidation. As observed by X-ray photoelectron spectroscopy (XPS), the oxygen concentration on the surface increased up to a saturation level of 20.2 ± 0.7 at %. With increasing treatment time, there were significant decreases in the concentrations of C-C sp2 and C=N groups and increases in the concentrations of C=O, O-C=O, O-(C=O)-O, C-N, and N-C=O containing moieties due to 253.7 nm photo-oxidation of the aromatic groups of PBI and reaction with ozone produced by 184. 9 nm photo-dissociation of oxygen. Because no significant changes in surface topography were detected by Atomic Force Microscopy (AFM) and SEM measurements, the observed decrease in the water contact angle down to ca. 44°, i.e., increase in hydrophilic, was due to the chemical changes on the surface.
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Sandor, R. B. "PBI (Polybenzimidazole): Synthesis, Properties and Applications." High Performance Polymers 2, no. 1 (1990): 25–37. http://dx.doi.org/10.1177/152483999000200103.

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Omar, Omran, Bao Ha, Katerine Vega, et al. "Reaction of ozone with polybenzimidazole (PBI)." Ozone: Science & Engineering 40, no. 5 (2018): 392–98. http://dx.doi.org/10.1080/01919512.2018.1446127.

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Fujigaya, Tsuyohiko, Yilei Shi, Jun Yang, Hua Li, Kohei Ito, and Naotoshi Nakashima. "A highly efficient and durable carbon nanotube-based anode electrocatalyst for water electrolyzers." Journal of Materials Chemistry A 5, no. 21 (2017): 10584–90. http://dx.doi.org/10.1039/c7ta01318c.

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Iridium (Ir) nanoparticles with a uniform diameter of 1.1 ± 0.2 nm were homogeneously deposited on multi-walled carbon nanotubes (MWNTs) wrapped by polybenzimidazole (PBI), in which PBI enables efficient anchoring of the Ir nanoparticles.
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Jiang, Junqiao, Erli Qu, Min Xiao, Dongmei Han, Shuanjin Wang, and Yuezhong Meng. "3D Network Structural Poly (Aryl Ether Ketone)-Polybenzimidazole Polymer for High-Temperature Proton Exchange Membrane Fuel Cells." Advances in Polymer Technology 2020 (August 14, 2020): 1–13. http://dx.doi.org/10.1155/2020/4563860.

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Poor mechanical property is a critical problem for phosphoric acid-doped high-temperature proton exchange membranes (HT-PEMs). In order to address this concern, in this work, a 3D network structural poly (aryl ether ketone)-polybenzimidazole (PAEK-cr-PBI) polymer electrolyte membrane was successfully synthesized through crosslinking reaction between poly (aryl ether ketone) with the pendant carboxyl group (PAEK-COOH) and amino-terminated polybenzimidazole (PBI-4NH2). PAEK-COOH with a poly (aryl ether ketone) backbone endows superior thermal, mechanical, and chemical stability, while PBI-4NH2 serves as both a proton conductor and a crosslinker with basic imidazole groups to absorb phosphoric acid. Moreover, the composite membrane of PAEK-cr-PBI blended with linear PBI (PAEK-cr-PBI@PBI) was also prepared. Both membranes with a proper phosphoric acid (PA) uptake exhibit an excellent proton conductivity of around 50 mS cm-1 at 170°C, which is comparable to that of the well-documented PA-doped PBI membrane. Furthermore, the PA-doped PAEK-cr-PBI membrane shows superior mechanical properties of 17 MPa compared with common PA-doped PBI. Based upon these encouraging results, the as-synthesized PAEK-cr-PBI gives a highly practical promise for its application in high-temperature proton exchange membrane fuel cells (HT-PEMFCs).
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Maurya, Sandip, Sung-Hee Shin, Ju-Young Lee, Yekyung Kim, and Seung-Hyeon Moon. "Amphoteric nanoporous polybenzimidazole membrane with extremely low crossover for a vanadium redox flow battery." RSC Advances 6, no. 7 (2016): 5198–204. http://dx.doi.org/10.1039/c5ra26244e.

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Zhang, Li, Qing Qing Ni, and Toshiaki Natsuki. "Mechanical Properties of Polybenzimidazole Reinforced by Carbon Nanofibers." Advanced Materials Research 47-50 (June 2008): 302–5. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.302.

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Polybenzimidazole (PBI) and vapor grown carbon nanofibers (VGNFs) nanocomposites were developed successfully by using ultrasonic mixing followed by hot compress. The contents of VGNFs used were 0.5wt%, 1wt%, 2wt% and 5wt%. The mechanical properties of neat PBI and PBI/VGNFs nanocomposites were discussed and the results were that the Young’s modulus, tensile strength, storage modulus and hardness were improved after adding VGNFs. Microscopic analysis showed that the dispersion of VGNFs in nanocomposites with a lower amount was considered to be uniform.
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Dissertations / Theses on the topic "Polybenzimidazole (PBI)"

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Gomes, Carlos André Mendonça. "Study of multi-component systems in polybenzimidazole membrane formation and their impact on membrane performance." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10651.

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Dissertação para obtenção do Grau de Mestre em Engenharia Química e Bioquímica<br>Integrally skinned asymmetric polybenzimidazole (PBI) membranes suitable for organic solvent nanofiltration (OSN) were prepared via phase inversion and several changes were implemented in the dope solutions in order to control their molecular weight cut-off (MWCO). Initially, uncrosslinked membranes with different polymer concentrations were tested to investigate their impact on membrane performance. On a second approach, several co-solvents were added in the dope solutions of PBI membranes. Coupling this methodology with chemical crosslinking, using an aromatic bi-functional crosslinker, provided solvent stable membranes with several MWCOs in the nanofiltration range and high permeance. Further variation of membrane dope parameters was tested in order to study membrane formation impact on membrane performance. Total solubility parameters of the chosen co-solvents were calculated, and a correlation between this tool and membrane performance was studied. Even though it was not possible to withdraw conclusions on a fundamental level, from the correlation of the total solubility parameters with membrane performance, this work demonstrates the possibility of developing PBI OSN membranes using different co-solvents and opens up future possibilities for controlling the MWCO of these membranes. A post-treatment study was also conducted in order to examine its impact in membrane performance.
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Petek, Tyler Joseph. "An Investigation of PBI/PA Membranes for Application in Pump Cells for the Purification and Pressurization of Hydrogen." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1320704555.

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Hofmann, Constanze. "Untersuchungen zur Elektrokatalyse von Hochtemperatur-Polymerelektrolytmembran-Brennstoffzellen (HT-PEMFCs)." Doctoral thesis, 2010. http://hdl.handle.net/11858/00-1735-0000-0006-B06B-9.

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Davies, Benjamin. "Separation of CO2 using ultra-thin multi-layer polymeric membranes for compartmentalized fiber optic sensor applications." Thesis, 2014. http://hdl.handle.net/1828/5207.

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Carbon dioxide sequestration is one of many mitigation tools available to help reduce carbon dioxide emissions while other disposal/repurposing methods are being investigated. Geologic sequestration is the most stable option for long-term storage of carbon dioxide (CO2), with significant CO2 trapping occurring through mineralization within the first 20-50 years. A fiber optic based monitoring system has been proposed to provide real time concentrations of CO2 at various points throughout the geologic formation. The proposed sensor is sensitive to the refractive index (RI) of substances in direct contact with the sensing component. As RI is a measurement of light propagating through a bulk medium relative to light propagating through a vacuum, the extraction of the effects of any specific component of that medium to the RI remains very difficult. Therefore, a requirement for a selective barrier to be able to prevent confounding substances from being in contact with the sensor and specifically isolate CO2 is necessary. As such a method to evaluate the performance of the selective element of the sensor was investigated. Polybenzimidazole (PBI) and VTEC polyimide (PI) 1388 are high performance polymers with good selectivity for CO2 used in high temperature gas separations. These polymers were spin coated onto a glass substrate and cured to form ultra-thin (>10 μm) membranes for gas separation. At a range of pressures (0.14 –0.41 MPa) and a set temperature of 24.2±0.8 °C, intrinsic permeabilities to CO2 and nitrogen (N2) were investigated as they are the gases of highest prevalence in underground aquifers. Preliminary RI testing for proof of concept has yielded promising results when the sensor is exposed exclusively to CO2 or N2. However, the use of both PBI and VTEC PI in these trials resulted in CO2 selectivities of 0.72 to 0.87 and 0.33 to 0.63 respectively, for corresponding feed pressures of 0.14 to 0.41 MPa. This indicates that both of the polymers are more selective for N2 and should not be used in CO2 sensing applications as confounding gas permeants, specifically N2, will interfere with the sensing element.<br>Graduate<br>0428<br>0495<br>0542<br>ben.t.davies@gmail.com
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Books on the topic "Polybenzimidazole (PBI)"

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L, Suthar J., and Langley Research Center, eds. Characterization of polybenzimidazole (PBI) film at high temperatures. National Aeronautics and Space Administration, Langley Research Center, 1992.

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Book chapters on the topic "Polybenzimidazole (PBI)"

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Steiner, G., and C. Zimmerer. "Polybenzimidazole (PBI)." In Polymer Solids and Polymer Melts – Definitions and Physical Properties I. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32072-9_77.

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Molleo, Max, Thomas J. Schmidt, and Brian C. Benicewicz. "Polybenzimidazole Fuel Cell polybenzamidazole (PBI) fuel cell Technology." In Encyclopedia of Sustainability Science and Technology. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0851-3_143.

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Wypych, George. "PBI polybenzimidazole." In Handbook of Polymers. Elsevier, 2012. http://dx.doi.org/10.1016/b978-1-895198-47-8.50093-x.

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Wypych, George. "PBI polybenzimidazole." In Handbook of Polymers. Elsevier, 2016. http://dx.doi.org/10.1016/b978-1-895198-92-8.50094-x.

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"Polybenzimidazole (PBI)." In Encyclopedic Dictionary of Polymers. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_8838.

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"Polybenzimidazole fiber (PBI)." In Encyclopedic Dictionary of Polymers. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_8839.

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Dawkins, B. G., F. Qin, M. Gruender, and G. S. Copeland. "Polybenzimidazole (PBI) high temperature polymers and blends." In High Temperature Polymer Blends. Elsevier, 2014. http://dx.doi.org/10.1533/9780857099013.174.

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"Rigid-Rod Polybenzimidazoles (PBIs): A Concise Review of Their Synthesis, Properties, Processing and Applications." In Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, Volume 5. CRC Press, 2009. http://dx.doi.org/10.1201/b12248-10.

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Conference papers on the topic "Polybenzimidazole (PBI)"

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Padenko, E., K. Friedrich, and B. Wetzel. "Tribology of innovative polybenzimidazole (PBI) coatings." In 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5045863.

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Cheddie, Denver F., and Norman D. H. Munroe. "Computational Modeling of PEM Fuel Cells With PBI Membranes." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97127.

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A parametric model of a proton exchange membrane fuel cell (PEMFC) operating with a polybenzimidazole (PBI) membrane is presented. The model is three dimensional and applicable for PEMFCs operating at intermediate temperatures (120–150 °C). It accounts for all transport and polarization phenomena, and the results compare well with published experimental data for equivalent operating conditions. Results for oxygen concentration and temperature variations are presented. The model predicts the oxygen depletion, which occurs in the catalyst area under the ribs, and which gives an indication of the catalyst utilization. Results also predict that for an output power density of 1 kW m−2, a cell temperature rise of up to 30 K can be expected for typical laboratory operating conditions. Parametric analyses indicate that significant gain in fuel cell performance can be expected by increasing the conductivity of the PBI membrane. Further, results demonstrate that when the catalyst region is well utilized, increasing the catalyst activity results in only a small improvement in performance.
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Shi, Zhongying, and Xia Wang. "Three Dimensional Non-Isothermal Model of a High Temperature PEM Fuel Cell." In ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2009. http://dx.doi.org/10.1115/fuelcell2009-85082.

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The proton exchange membrane (PEM) fuel cell using a polybenzimidazole (PBI) membrane operates between 120 °C and 180 °C, higher than the PEM fuel cell with a Nafion based membrane (lower than 80°C). Few studies have been conducted in the theoretical modeling of the PEM fuel cell with a PBI membrane. Experimental results have shown that the conductivity of a PBI membrane is affected by the phosphoric acid doping level, the cell operating temperature and the relative humidity. The fuel cell performance is thus affected by these parameters as well. The objective of this paper is to develop a three dimensional non-isothermal model to investigate the performance of the fuel cell with a PBI membrane. This new model considers influences of the relative humidity of the inlet air, the phosphoric acid doping level, and the operating temperature on the performance of fuel cells. The model is validated using the experimental data. A high oxygen concentration is found under the flow channel, as well as a high temperature region. The performance of fuel cells increases with the increase of the phosphoric doping level, temperature or relative humidity. The fuel cell performance is found to be more sensitive to the doping level and temperature changes, and less sensitive to the change of relative humidity.
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Ubong, Etim U., Diana Phillips, and Matt Gieseke. "Regeneration of Pt Electrode Activity in H3PO4/PBI Doped PEMFC Membrane Following CO Poisoning." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33333.

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An investigation has been made on a high temperature polybenzimidazole (PBI) proton exchange membrane doped with phosphoric acid. Two and five percent concentrations of CO in the hydrogen were evaluated to determine the effect of high CO concentrations on the performance of the PBI membrane under conditions that are representative of reformed fuels. A 3 × 3 matrix of fuel composition, temperature and air stoichiometry was studied at two pressures: one atmosphere and one bar gage. A controlled experiment using hydrogen of 99.997% purity was used as a baseline fuel before and after the exposure to higher CO concentrations. A comparison between the pure hydrogen runs and those where CO was also present in the fuel showed a significant reduction in cell performance. Subsequent runs with pure hydrogen restored the cell performance. The mechanism that led to the cell recovery with pure hydrogen will be discussed.
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Waller, Michael G., Mark R. Walluk, and Thomas A. Trabold. "Performance of a High Temperature Proton Exchange Membrane Fuel Cell (HT-PEMFC) Operating on Simulated Reformate." In ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2015 Power Conference, the ASME 2015 9th International Conference on Energy Sustainability, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/fuelcell2015-49562.

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Conventional proton exchange membrane (PEM) fuel cell systems suffer from requiring high purity hydrogen, necessitating a costly on-board hydrogen storage tank to be incorporated into the overall system design. One method to overcome this barrier is to use an on-board reforming system fueled by some sort of hydrocarbon. Unfortunately though, most fuel reforming processes generate significant amounts of impurities, such as CO and CO2, requiring a costly and complex upfront reforming system that is unwieldy for a practical system. High temperature PEM fuel cells based on acid doped polybenzimidazole (PBI), are capable of operating on lower quality reformed hydrogen, allowing for a simplified on-board fuel reforming system design to be envisioned. Advances in high temperature PEM fuel cells have progressed to the point where they are now a commercially viable technology. However, there remains a lack of published literature on the performance of HT-PEMFCs operating on common reformate effluent compositions consisting primarily of H2, CO, CO2, and N2. In this work, the performance of PBI-based HT-PEMFCs are evaluated under simulated reformate compositions.
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Das, Susanta K., and K. J. Berry. "Synthesis and Performance Evaluation of an S-POSS Based PBI Electrolyte for High Temperature PEM Fuel Cell Applications." In ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2016 Power Conference and the ASME 2016 10th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fuelcell2016-59214.

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In this paper, using patented nano-additive based polymer synthesis technology, a novel approach to the design and fabrication of high temperature proton exchange membrane (PEM) has been developed. The presence of sulfonated octaphenyl POSS (S-POSS) in a PBI-PA (polybenzimidazole-phosphoric acid) membrane results in a 40–50% increase in conductivity at 120–200$deg relative to non-sulfonated silica or POSS control fillers at comparable weight percent filler loadings and PBI molecular masses, and also relative to unfilled PBI-PA membranes. In addition, the presence of S-POSS and silica both result in physical reinforcement of the membrane and increased its modulus and mechanical integrity, but only S-POSS offers the benefits of both increased conductivity and increased modulus. Isophthalic acid and 3,3’-diaminobenzidine (DAB) were polymerized in the presence of polyphosphoric acid (PPA) and S-POSS nanoadditive, and the degree of polymerization was monitored by viscosity and torque change measurements. Molecular mass was determined by inherent viscosity measurements of samples removed from the reaction solution. Membranes were prepared by casting the reaction solution and allowing PPA to hydrolyze to PA under ambient conditions. The membranes were characterized for acid content, in-plane conductivity, tensile modulus and shear modulus, and were roll-milled to achieve the desired thickness for membrane electrode assembly (MEA) fabrication.
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Bhamidipati, Kanthi Latha, and Tequila A. L. Harris. "Numerical Analysis of the Effects of Processing Conditions on the Casting of High Temperature PEMFC Membrane Solutions." In ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2009. http://dx.doi.org/10.1115/fuelcell2009-85064.

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Polymer Electrolyte Membranes have numerous failure modes resulting from chemical, mechanical and thermal influences. The conventional state–of–the–art low temperature Nafion® membrane is susceptible to such failures due to its sensitivity to high temperatures and the presence of carbon monoxide (CO) in the reactant streams, which poisons the platinum catalyst at low temperatures. To circumvent these problems, novel, cost-effective membranes that operate at high temperatures (&gt;120°C) and low humidity levels, such as phosphoric acid doped polybenzimidazole (PBI/PA) membranes, have been developed. However, an optimized manufacturing process for the PBI membranes is required to negate failure mechanisms that are mechanically and thermally induced; e.g., gas cross-over due to pinholes. This paper focuses on understanding defects arising in the fluid state during manufacturing, using Computational Fluid Dynamics (CFD) techniques. Simulations are performed to understand the effects of processing conditions (substrate velocity, inlet velocity and temperature) on the quality of the cast and pressure drop through the system. It is found that processing speeds affected both the cast quality and pressure drop, while temperature only affected the pressure drop.
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Andreasen, So̸ren Juhl, Rasmus Mosbæk, Jakob Rabjerg Vang, So̸ren Knudsen Kær, and Samuel Simon Araya. "EIS Characterization of the Poisoning Effects of CO and CO2 on a PBI Based HT-PEM Fuel Cell." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33054.

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This paper presents test results regarding the poisoning effects of CO and CO2 on H3PO4/Polybenzimidazole (PBI) membrane based high temperature proton exchange membrane fuel cell (HT-PEMFC). Electrochemical impedance spectroscopy (EIS), which is a non intrusive diagnostic tool for electrochemical systems, has been used to investigate these effects. A single cell test setup consisting of an electrically heated single cell assembly with a PEMEAS CELTEC P membrane electrode assembly (MEA) of an active area of 45cm2 and mass flow controllers for Air, H2, CO and CO2 was constructed in the laboratory. All operational parameters as well as data acquisition are controlled by two LabView programs, running on two separate computers. The impedance spectrum of the fuel cell is recorded at different operating points and then an Equivalent Circuit (EC), proposed for modelling the cell impedance, is fitted to the spectrum in order to analyze and quantify the impact of the individual factors on HT-PEMFC performance. Results showed that CO poisoning has an effect on all the losses monitored. Intermediate frequency resistances showed higher increase with increasing contamination and decreasing temperature than high frequency resistances, which is attributable to the adsorption of CO on Pt catalyst.
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Guglielmo, Dave C., Todd T. B. Snelson, and Daniel F. Walczyk. "Modeling Ultrasonic Sealing of Membrane Electrode Assemblies for High-Temperature PEM Fuel Cells." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54427.

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Ultrasonic bonding, with its extremely fast cycle times and energy efficiency, is being investigated as an important manufacturing technology for future mass production of fuel cells. The objectives of the authors’ research are to (1) create a multi-physics simulation model that predicts through-thickness energy distribution and temperature gradients during ultrasonic sealing of polybenzimidazole (PBI) based Membrane Electrode Assemblies (MEAs) for High Temperature PEM fuel cells, and (2) correlate the model with experimentally measured internal interface (e.g., membrane/catalyst layer) temperatures. The multi-physics model incorporates the electrode and membrane material properties (stiffness and damping) in conjunction with the ultrasonic process parameters including pressure, energy flux and vibration amplitude. Overall, the processing of MEAs with ultrasonic bonding rather than a hydraulic thermal press results in MEAs that meet or exceed required performance specifications, and potentially reduces the manufacturing time from minutes to seconds.
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Zuliani, Nicola, Rodolfo Taccani, and Robert Radu. "Experimental and Theoretical Performance Analysis of a High Temperature PEM Fuel Cell Fed With LPG Using a Compact Steam Reformer." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54618.

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High temperature PEM (HTPEM) fuel cell based on polybenzimidazole polymer (PBI) and phosphoric acid, can be operated at temperature between 120°C and 180°C. Reactants humidification is not required and CO content up to 1% in fuel can be tolerated, affecting only marginally performance. This is what makes HTPEM fuel cells very attractive, as low quality reformed hydrogen can be used and water management problems are avoided. This paper aims to present the preliminary experimental results obtained on a HTPEM fuel cell fed with LPG using a compact steam reformer. The analysis focus on the reformer start up transient, on the influence of the steam to carbon ratio on reformate CO content and on the single fuel cell performance at different operating conditions. By analyzing the mass and energy balances of the fuel processor, fuel cell system, and balance-of-plant, a previously developed system simulation model has been used to provide critical assessment on the conversion efficiency for a 1 kWel system. The current study attempts to extend the previously published analyses of integrated HTPEM fuel cell systems.
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Reports on the topic "Polybenzimidazole (PBI)"

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Kydd, George H., and Joan C. Marano-Goyco. Fire Tests of Polybenzimidazole (PBI) Blends. Defense Technical Information Center, 1986. http://dx.doi.org/10.21236/ada205999.

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Krishnan, Gopala N., Kathryn A. Berchtold, Indira Jayaweera, et al. Fabrication and Scale-up of Polybenzimidazole (PBI) Membrane Based System for Precombustion- Based Capture of Carbon Dioxide. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1073750.

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Krishnan, Gopala, Indira Jayaweera, Angel Sanjrujo, et al. Fabrication and Scale-up of Polybenzimidazole (PBI) Membrane Based System for Precombustion-Based Capture of Carbon Dioxide. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1050227.

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