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Thursday, July 23, 2020 | History

2 edition of Novel fluorinated acids for phosphoric acid fuel cells found in the catalog.

Novel fluorinated acids for phosphoric acid fuel cells

D. D. Desmarteau

Novel fluorinated acids for phosphoric acid fuel cells

by D. D. Desmarteau

  • 4 Want to read
  • 2 Currently reading

Published .
Written in English


Edition Notes

StatementD.D. Desmarteau.
SeriesPB 90 162 157
ID Numbers
Open LibraryOL21238971M

  The fluorinated triphosphoric acid 1 was used for the preparation of the corresponding fluorinated deoxynucleotides (dNTPs). One of these dNTP analogs (dT) was demonstrated to fit into DNA polymerase beta (DNA pol β) binding pocket by obtaining a Å resolution crystal structure of a ternary complex with the enzyme. The evaluation of the proton-conducting polymers as additives to phosphoric acid fuel cells was conducted in single cells with high surface area electrocatalysts (state-of-the- art fuel cell electrodes) and an immobilized silicon carbide matrix. Experimental results in the phosphoric acid fuel cell (single cell) served as the base line.

Sigma-Aldrich offers a number of meta-Phosphoric acid products. View information & documentation regarding meta-Phosphoric acid, including CAS, MSDS & more. High conductivities have been obtained at temperatures up to °C. The final category of polymeric PEMs comprises non-functionalized polymers with basic character doped with proton-conducting acids such as phosphoric acid. The advanced features include high CO tolerance and thermal management.

In phosphoric acid fuel cells, phosphoric acid is used as an electrolyte. Inside the fuel cell, the positively charged ions travel from the anode to the cathode. Phosphoric acid fuel cells have several advantages over other fuel cells. Phosphoric acid fuel cells can handle a carbon monoxide level of about percent. Phosphoric acid, also known as orthophosphoric acid, is one of the most widely known and used acids. It is a mineral acid that contains three atoms of hydrogen, one atom of phosphorus, and four atoms of oxygen. Thus, the chemical formula of phosphoric acid is H 3 PO 4. This is an important acid which has a wide range of uses.


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Novel fluorinated acids for phosphoric acid fuel cells by D. D. Desmarteau Download PDF EPUB FB2

Phosphoric Acid Fuel Cells. The first studies using aqueous 25% phosphoric acid (H 3 PO 4) as electrolyte at temperatures in the range of 23–80 °C showed the oxidation of propylene to acrolein and acrylic acid, but poor selectivity to a particular product was found.

Phosphoric acid fuel cells (PAFC) are a type of fuel cell that uses liquid phosphoric acid as an were the first fuel cells to be commercialized. Developed in the mids and field-tested since the s, they have improved significantly in stability, performance, and cost. Florian Mack, Karin Aniol, Corina Ellwein, Jochen Kerres, Roswitha Zeis, Novel phosphoric acid-doped PBI-blends as membranes for high-temperature PEM fuel cells, Journal of Materials Chemistry A, /C5TAB, 3, 20, (), ().Cited by: Novel Blend Membranes Based on Acid-Base Interactions for Fuel Cells Article (PDF Available) in Polymers 4(4) December with 6, Reads How we measure 'reads'.

Novel fuel cells based on nanocomposite materials. Fuel cell operating temperatures above °C are desired to improve CO tolerance, to achieve faster reaction kinetics and easier water management, and to reduce heat exchange by: 1. @article{osti_, title = {Improved acid electrolytes - the synthesis and structure of fluorine-containing sulfonic acids for fuel cells.

Annual report, July July }, author = {Gard, G L}, abstractNote = {Twelve fluorosulfonic acids/salts were prepared or purified. Also, sixteen fluoroesters (precursors to sulfonic acids) have been prepared and characterized.

Traditionally, sulfonated polymers are used as separator materials in PEM fuel cells. Based on recent experimental results on model compounds this paper critically discusses the potentials and limits of sulfonic acid and alternatively phosphonic acid and heterocycles (imidazole) as protogenic groups for PEM fuel cell electrolytes operating at intermediate temperatures (T > °C) and low.

The polymer electrolyte fuel cell (PEFC) is based on Nafion polymer membranes operating at a temperature of 80°C. The main characteristics (structure and properties) and problems of Nafion-based PEFC technology are discussed. The primary drawbacks of Nafion membranes are poor conductivity at low relative humidities (and consequently at temperatures >°C and ambient pressure) and large.

phosphoric acid fuel cell acid fuel electrolyte additive Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.

Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number EP Other languages German (de. Carsten Korte, Phosphoric Acid, an Electrolyte for Fuel Cells – Temperature and Composition Dependence of Vapor Pressure and Proton Conductivity, Fuel Cell Science and Engineering, /, (), ().

This study demonstrates that phosphoric acid fuel cells with power density values as high as mW cm−2 are realizable by employing a combination of SiC and ZrSiO4 as an electrolyte matrix, and.

The development of anhydrous membranes based on phosphoric acid doped polymers, ionic liquid-infused polymer gels and solid acids can enable fuel cell operation above °C. Considerable work remains to be done to identify proton transport mechanisms in novel membranes and evaluate membrane durability under real world operating conditions.

Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is a weak acid with the chemical formula H 3 P O is normally encountered as a colorless syrup of 85% concentration in water. The pure compound is a colorless solid. All three hydrogens are acidic to varying degrees and can be lost from the molecule as H + ions ().When all three H + ions are removed, the result is.

Fuel Cells11 (3), DOI: /fuce Saswata Bose, Tapas Kuila, Thi Xuan Hien Nguyen, Nam Hoon Kim, Kin-tak Lau, Joong Hee Lee. Polymer membranes for high temperature proton exchange membrane fuel cell: Recent advances and challenges. Synthesis and Characterization of Novel Fluorine Containing Alkylsulfonyls and Sulfonates: Fluorinated Sulfonyl Methanes and would be hostile to carboxylic acid or phosphoric acid groups.

When combined with a perfluorinated polymer, the fuel cells or lithium batteries. Polymers that carry a sulfonic acid substituent can assist the.

The U.S. Department of Energy's Office of Scientific and Technical Information. Phosphoric acid doped crosslinked polybenzimidazole (PBI-OO) blend membranes for high temperature polymer electrolyte fuel cells.

Journal of Membrane Science, DOI: / A proton exchange membrane for a fuel cell is prepared from a polyimidazole polymer having the formula: wherein R 1 -R 3 are independently H, a halogen, an alkyl or a substituted alkyl.

X 1 and X 2 are independently or an electron withdrawing group such as CN. phosphoric acid is an indifferent fuel cell electrolyte due to the marked irreversibility of the dioxygen reduction reaction in this medium even at OC.

Yeager, J. Huang and S. Clouser of the Case Western Reserve IJniversity examined the dioxygen reduction mechanism in purified phosphoric acid.

Merits & Shortcomings of Phosphoric Acid Cells Specific Applications INTRODUCTION 2- 1 COMPARATIVE POWER SYSTEM HARDWARE DATA BASE 3- 1 INTRODUCTION 3- 1 PHOSPHORIC ACID FUEL CELL DATA 3- 1 Organization 3- 1 Technical Premises 3- 3 Results and Discussion 3- 4 Fuels 3- 4. The preparation and characterization of composite polybenzimidazole (PBI) membranes containing zeolitic imidazolate framework 8 (ZIF-8) and zeolitic imidazolate framework 67 (ZIF) is reported.

The phosphoric acid doped composite membranes display proton conductivity values that increase with increasing temperatures, maintaining their conductivity under anhydrous conditions.There are various types of fuel cells that are under development. The most noticeable ones are polymer electrolyte membrane (PEM) fuel cells, phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), and solid oxide fuel cells.electrolyte, such as phosphoric acid, which operates at about • C, or fluorinated sulfonic acid with operation temperature around o•c (3, 4).

In comparison with phosphoric acid, trifluoromethane-sulfonic acid (TFMSA) shows. pr~mising. results as an electrolyte for fuel cells.