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Thursday, July 16, 2020 | History

1 edition of Production of fluorine in a proton exchange membrane reactor found in the catalog.

Production of fluorine in a proton exchange membrane reactor

by Robert Lowrey

  • 221 Want to read
  • 8 Currently reading

Published .
Written in English


Edition Notes

Statementby Robert Lowrey
The Physical Object
Paginationxi,150 leaves :
Number of Pages150
ID Numbers
Open LibraryOL25906317M
OCLC/WorldCa52619438

About this book Introduction Not only can phosphoric acid and solid oxide fuel cells already efficiently convert today’s fossil fuels, including methane, into electricity, but other types of fuel cells, such as polymer electrolyte membrane fuel cells, have the potential to become the cornerstones of a possible future hydrogen :// Request PDF | Pervaporation Membrane Reactors | The integration of a reactor with a separation unit allows to increase the product yield through a constant change in the composition of the

The state of health of polyfluorinated sulfonic-acid ionomer membranes (e.g. Nafion®) in low-temperature proton exchange membrane fuel cells (LT-PEMFCs) is negatively influenced by degradation phenomena occurring during their operation. As a consequence, the performance and durability of the membrane #! Environmental challenges and energy sustainability remain relevant for meaningful growth and development. Economic growth has been coupled with increasing energy demand across the globe. Hydrocarbons from fossil fuels dominate other available fuel sources for energy production. The world is not unfamiliar with significant contributions of environmental degradations and social ://

Up to now, the proton exchange membranes (PEMs) used in PEFCs have been based on perfluorosulfonic acid (PFSA) ionomers (for example, Nafion). However, several problems have limited the widespread adoption of PEFCs, including high gas permeability, low thermal stability, high production cost and environmental ://   The technology basis is self-innovated membrane producing theory system “four-balance theory - three related principle - double cooperation effect” and membrane modification theory system” molecular structure design - topological structure design - principle of ultra - micro reactor”


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Production of fluorine in a proton exchange membrane reactor by Robert Lowrey Download PDF EPUB FB2

A proton exchange membrane (PEM) reactor for electrolytic pro-duction of fluorine was evaluated as a potential alternative to the electrolyzers used for commercial fluorine production. This process is similar in concept to the anhydrous HCl recycle process which uti-lizes a PEM reactor to electrolyze anhydrous HCl forming Sol St Lett 2.

Production of fluorine in a proton exchange membrane reactor. By Robert Lowrey. Abstract (Thesis) Thesis (Ph. D.)--University of Florida, (Bibliography) Includes bibliographical (Statement of Responsibility) by Robert Lowrey Proton exchange membranes, typically Nafion, are generally used as a separator in MFCs.

Behera et al. [78], fabricated an MFC with ceramic separator as proton exchange membrane having an anode chamber volume of mL, which could recover a maximum power density of   For the performance investigation of a biohydrogen reactor integrated with a proton exchange membrane fuel cell (PEMFC), mesophilic trickling bed bioreactors (TBRs) filled with hydrophobic materials (HBM) were designed and conducted for hydrogen production under the anaerobic fermentation of sucrose.

The bioreactor consisted of the column packed with polymeric cubes and   The electrocatalytic hydrogenation of alkynes was performed in a proton-exchange membrane reactor. Product selectivity for the hydrogenation could be controlled by the catalyst material and the cathode potential.

The use of a Pd catalyst gave Z-alkenes selectively with excellent current efficiencies at relatively low electrolysis ://   Electroreduction of CO2 is performed in proton exchange membrane reactors (PEMRs) with a buffer layer to investigate the critical factors that determine the cell performance.

The buffer layer has the function of ensuring sufficient cathode potential (above the potential threshold of Cu, Sn, and In catalysts at around − to − V) compared with the limited cathode potential in the   The membrane resistance for proton conduction decreases exponentially with water activity in the membrane, aw; the experimental data for Nafion is fit very well with the expression, Rm=*exp((aw) ) Ω-cm.

(Yang, Benziger, et al. Membrane Science ) Water removal and water production are balanced at steady ://~benziger/ Ion-exchange membranes have been used in various industrial processes, e.g., in the electrodialytic concentration of seawater to produce edible salt, as a separator for electrolysis, in the Acknowledgments.

We would like to gratefully acknowledge the Department of Energy/National Energy Technology Laboratory (DE-FE), the Office of Naval Research/DJW Technology (NC), the National Science Foundation (CBET and IIP ), and the Ohio Development Services Agency (OOE-CDO-D) for their financial support of the results published in this ://   The net increase of proton concentration in the middle compartment (pH at ) accounted for ± % of the total charge applied.

The CE loss for hydroxide production was estimated at ± %. Hence, the total CE loss for HCl production is estimated Membrane reactors represent a promising alternative for biodiesel production in an intensified process. Currently, the size and number of equipment, as well as the noncontinuous process, are major concerns in biodiesel production.

In the membrane reactor process, both catalytic reaction and separation are combined into a single operation :// Advanced membrane reactor technologies provide the opportunities for low-cost, high efficiency, and low-emission hydrogen production from coal.

This chapter focuses on the state of the art of hydrogen- and CO 2-selective membranes and membrane reactors for hydrogen production from coal with CO 2 capture.

First, the traditional technologies for Device and Materials Modeling in PEM Fuel Cells is a specialized text that compiles the mathematical details and results of both device and materials modeling in a single volume.

Proton exchange membrane (PEM) fuel cells will likely have an impact on our way of life similar to the integrated ://   Production of Hydrogen Peroxide for Drinking Water Treatment in a Proton Exchange Membrane Electrolyzer at Near-Neutral pH Alkaline peroxide synthesis has been demonstrated in a number of different reactor include the work of Zhao et al.

who reported high production rates and efficiency for the 2e-reduction of O 2 to H 2 O 2 on fluorine   We have developed a novel gas-phase electrocatalytic system for the conversion of CO 2 into added-value chemicals. The system is based on a high-temperature proton-exchange membrane reactor containing a Cu cathodic catalyst supported on carbon nanofibers (CNFs) and an H 3 PO 4-doped polybenzimidazole polymer electrolyte membrane (PBI).The resulting Cu–CNFs/PBI/IrO 2 membrane   The performance of such electrochemical reactors can be influenced by a number of factors including the properties of the membrane, which play an important role in reactor optimization.

This review discusses the role of Nafion as a membrane, as well as its importance in the catalyst layer for the formation of the so-called three-phase :// A Novel Fluorine Production Process in a Proton Exchange Membrane Reactor I generated elemental fluorine in a proton exchange membrane separated electrolysis reactor.

impractical for Hydrogen is seen as the new energy carrier for sustainable energy systems of the future. Meanwhile, proton exchange membrane fuel cell (PEMFC) stacks are considered the most promising alternative to the internal combustion engines for a number of transportation applications.

Nevertheless, PEMFCs need high-grade hydrogen, which is difficultly stored and :// Downloadable (with restrictions). This paper presents the results of a study for a kW net electrical power PEM fuel cell system. The major system components are an autothermal reformer, high and low temperature shift reactors, a preferential oxidation reactor, a PEM fuel cell, a combustor and an expander.

Intensive heat integration within the PEM fuel cell system has been necessary to   Zirconium phosphate reinforced short side chain perflurosulfonic acid membranes for medium temperature proton exchange membrane fuel cell application.

Journal of Power Sources, DOI: /ur Masato Ohashi, Sensuke ://. In this study a mathematical model is developed and evaluated in order to describe an experimental methanol fuel processor (a combination of autothermal reformer and preferential oxidation reactor) for the production of hydrogen to be used it as the main fuel of a Proton Exchange Membrane Fuel Cell (PEMFC) for the generation of 1kW electrical ://In this work the surfaces of polymeric membranes based on Nafion (proton conducting material), used in proton exchange membranes fuel cells (PEMFC) had been modified by plasma deposition of   In this study, the methanol steam reforming reaction was carried out in a carbon membrane reactor (CMR) for hydrogen production.

The behavior in the CMR was compared to that in a fixed-bed reactor (FBR) at the same experimental conditions. The parameters temperature, carrier gas flow rate, and feed ratio were investigated to better understand the separation effect of hydrogen in the CMR on