{"product_id":"chtefccempbic","title":"Polybenzimidazole (PBI) Cation-Exchange Membrane (Celazole, T=55 um) for High-Temperature Electroyzer and Fuel Cell, CHTEFCCEMPBIC","description":"\u003cp\u003eCelazole® PBI (Polybenzimidazole), originally developed by Celanese (now produced by PBI Performance Products), is the premier commercial standard for aromatic heterocyclic polymers. In electrochemical and membrane separation fields, Celazole PBI is widely deployed as a high-temperature proton exchange membrane (HT-PEM) and gas separation membrane capable of continuous operation across 120°C to \u0026gt;200°C. Its fundamental backbone—poly[2,2’-(m-phenylene)-5,5’-bibenzimidazole] (often called m-PBI)—features rigid, fully aromatic repeating units that impart exceptional thermal stability (Tg \u0026gt; 425°C), chemical inertness, and basic nitrogen sites for acid doping.\u003c\/p\u003e\n\u003cp\u003eThe key properties of the Celazole PBI membranes are: (1) \u003cstrong\u003eAcid Doping for Anhydrous Proton Conduction\u003c\/strong\u003e: Pristine Celazole PBI is an electrical insulator. When soaked in concentrated phosphoric acid (H3PO4), the basic imidazole nitrogens (-N= and -NH-) form hydrogen-bonded networks with the acid. Protons hop via the Grotthuss mechanism along the acid chains. Unlike sulfonated fluoropolymers (e.g., Nafion), Celazole PBI does not require humidification to conduct protons, operating efficiently at 150°C--180°C under completely dry feed conditions. (2) \u003cstrong\u003eAcid Doping Level (ADL) vs. Mechanical Robustness\u003c\/strong\u003e: Measured as moles of H3PO4 per PBI repeat unit (mol\/PRU). Typical Target Range: 6 to 12 mol H3PO4\/PRU, yielding a conductivity of 0.04 to \u0026gt;0.10 S\/cm at 160°C.\u003c\/p\u003e\n\u003cp\u003eThe key application fields are: (1) \u003cstrong\u003eHigh-Temperature PEM Fuel Cells (HT-PEMFC)\u003c\/strong\u003e: (i) \u003cem\u003eReformed Methanol Fuel Cells (RMFC)\u003c\/em\u003e: Direct coupling with on-board methanol or natural gas reformers; high CO tolerance eliminates costly multi-stage water-gas shift (WGS) and preferential oxidation (PROX) purification reactors. (ii) \u003cem\u003eAviation \u0026amp; Marine APUs\u003c\/em\u003e: Elevated operating temperatures allow compact, lightweight radiators without bulky humidification hardware. (2) E\u003cstrong\u003electrochemical Hydrogen Separation \u0026amp; Compression (EHC)\u003c\/strong\u003e: Extraction of pure H2 directly from high-temperature syngas or industrial waste streams with simultaneous electrochemical pressurization (\u0026gt;50bar). (3) \u003cstrong\u003eHigh-Temperature Gas Separation\u003c\/strong\u003e: Post-combustion CO2\/N2 capture and pre-combustion H2\/CO2 separation at elevated process temperatures where conventional polymeric gas membranes degrade.\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 611.837px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 40.2375px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 40.2375px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 40.2375px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCHTEFCCEMPBIC (C-HTEFC-CEM-PBIC)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 86.4px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 86.4px;\"\u003e\u003cem\u003eChemical Structure\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 86.4px;\"\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CRFBIEMPBI_molecular_structure_160x160.png?v=1768589215\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 35.6px;\"\u003e\u003cem\u003eAppearance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eBrown or Dark Brown\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 10px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 10px;\"\u003e\u003cem\u003eMembrane Thickness \u0026amp; Molecular Weight\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 10px;\"\u003e\n\u003cp\u003e\u003cspan\u003eT=55 um, Mw = 60000\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 106.8px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 106.8px;\"\u003e\u003cem\u003eSheet Dimensions\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 106.8px;\"\u003e\n\u003cp\u003e\u003cspan\u003e(1) 10cm * 10cm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e(2) 20cm * 20 cm\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e(3) 30cm * 20 cm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOther large dimensions can be supplied upon request\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 35.6px;\"\u003e\u003cem\u003eOperation Temperature\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e150 °C for continuous operation, and the ultimate temperature is 300 °C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 186.8px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 186.8px;\"\u003e\u003cem\u003ePretreatment Status\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 186.8px;\"\u003e\n\u003cp\u003e\u003cspan\u003ePhosphoric acid pretreatment is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003cspan\u003eClean the membrane with DI H2O\/ethanol for 10-20 min\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImmersed in 85-10% H3PO4 for 1-48 h at 80-120°C\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRising with DI H2O for multiple times to remove free H3PO4\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDry the membrane at low temperature (\u0026lt;60°C) for 12-14 h\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 35.6px;\"\u003e\u003cem\u003eProton Conductivity\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e~0.1 S\/cm (at 160°C, anhydrous)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 39.2px;\"\u003e\u003cem\u003eAcid Concentration for Operation\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 39.2px;\"\u003e\n\u003cp\u003e\u003cspan\u003e55 wt% (+\/-4 wt%)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 35.0575%; height: 35.6px;\"\u003e\u003cem\u003ePackage Grade\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.7626%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e1 pcs\/pack \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReferences\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e(1）\u003ca href=\"https:\/\/pubs.acs.org\/doi\/abs\/10.1021\/acsaem.3c00522\"\u003eK. Likit-anurak, et al., Polybenzimidazole Membranes as Nafion Replacement in Aqueous HCl Electrolyzers, ACS Appl. Energy Mater. 2023, 6, 10, 5429–5434\u003c\/a\u003e. \u003c\/p\u003e\n\u003cp\u003e(2) \u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S2405829721005936\"\u003eQ. Li, et al., PBI-Based Polymer Membranes for High Temperature Fuel Cells – Preparation, Characterization and Fuel Cell Demonstration, Fuel Cells, 2004, 4, 147-159.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"CLKXZ","offers":[{"title":"10cm * 10cm","offer_id":48201591423206,"sku":"CHTEFCCEMPBIC1010","price":159.0,"currency_code":"USD","in_stock":true},{"title":"20cm * 20cm","offer_id":48201591455974,"sku":"CHTEFCCEMPBIC2020","price":499.0,"currency_code":"USD","in_stock":true},{"title":"30cm * 20cm","offer_id":48201591488742,"sku":"CHTEFCCEMPBIC3020","price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CHTEFCCEMPBIC_main.jpg?v=1786818014","url":"https:\/\/echemsupplies.com\/products\/chtefccempbic","provider":"EChem Supplies","version":"1.0","type":"link"}