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Zeolite modification for direct alcohol fuel cells DAFCs

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Zeolite modification for direct alcohol fuel cells DAFCs ( zeolite-modification-direct-alcohol-fuel-cells-dafcs )

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Recent Advances on Zeolite Modification for Direct Alcohol Fuel Cells (DAFCs) I.G.B.N. Makertiharthaa), M. Zunitab), Z. Rizki c), P.T. Dharmawijayad) Chemical Engineering Department, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, West Java, Indonesia a)Corresponding author: makertia@che.itb.ac.id b)megazunita.105@gmail.com c)zulhaj.rizki@outlook.com d)pututeguhd@yahoo.co.id Abstract. The increase of energy demand and global warming issues has driven studies of alternative energy sources. The polymer electrolyte membrane fuel cell (PEMFC) can be an alternative energy source by (partially) replacing the use of fossil fuel which is in line with the green technology concept. However, the usage of hydrogen as a fuel has several disadvantages mainly transportation and storage related to its safety aspects. Recently, alcohol has gained attention as an energy source for fuel cell application, namely direct alcohol fuel cell (DAFC). Among alcohols, high-mass energy density methanol and ethanol are widely used as direct methanol fuel cell (DMFC) and direct ethanol fuel cell (DEFC), respectively. Currently, the performance of DMFC is still rudimentary. Furthermore, the use of ethanol gives some additional privileges such as non-toxic property, renewable, ease of production in great quantity by the fermentation of sugar-containing raw materials. Direct alcohol fuel cell (DAFC) still has weakness in the low proton conductivity and high alcohol crossover. Therefore, to increase the performance of DAFC, modification using zeolite has been performed to improve proton conductivity and decrease alcohol crossover. Zeolite also has high thermal resistance properties, thereby increasing DAFC performance. This paper will discuss briefly about modification of catalyst and membrane for DAFC using zeolite. Zeolite modification effect on fuel cell performance especially proton conductivity and alcohol crossover will be presented in detail. Keyword: Fuel cells, DAFC, Zeolite, Conductivity, Selectivity. INTRODUCTION Fossil fuels are decreased from year to year and accompanied with rapidly increasing energy demand and consumption.1 The world energy consumption is 22 billion tons of oil equivalents which 90 % of them are generated by burning fossil fuels such as oil (38.2 %), natural gas (24.2 %), and coal (27.6 %).1, 2 Transportation system and energy-intensive sectors as the principal pillar of civilization are the biggest fossil fuel consumption and associated with progressive release of greenhouse gases. Those problems can make a lot of losses for developed and underdeveloped countries because economic growth will be hampered significantly.2-5 Therefore, many researchers tried to make some solutions hammering those problems by developing renewable energy and green fuel sources, which are called as green technology concept. Green technology concept is one of best solution to solve energy problems. Moreover, green technology can decrease global warming effect, acid rain, and air pollution from filth of fossil fuels (CO2, NOx, and CO).6, 7 Therefore, many research have been focused to find alternative substitute of conventional fossil fuel towards renewable and green energy8. The potential alternatives of energy sources are solar, wind, geothermal, biomass, and Engineering International Conference (EIC) 2016 AIP Conf. Proc. 1818, 020030-1–020030-10; doi: 10.1063/1.4976894 Published by AIP Publishing. 978-0-7354-1486-0/$30.00 020030-1

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