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Decomposition of Formic Acid and Acetic Acid into Hydrogen Using Graphitic Carbon Nitride Supported Single Metal Catalyst

Author

Listed:
  • Wan Nor Roslam Wan Isahak

    (Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia)

  • Muhammad Nizam Kamaruddin

    (Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia)

  • Zatil Amali Che Ramli

    (Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia)

  • Khairul Naim Ahmad

    (Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia)

  • Waleed Khalid Al-Azzawi

    (Department of Medical Instruments Engineering Techniques, Al-Farahidi University, Baghdad 10001, Iraq)

  • Ahmed Al-Amiery

    (Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia
    Energy and Renewable Energies Technology Center, University of Technology-Iraq, Baghdad 10001, Iraq)

Abstract

In a combination of generation and storage of hydrogen gas, both formic acid (FA) and acetic acid (AA) have been notified as efficient hydrogen carriers. This study was conducted to synthesize the monometallic catalysts namely palladium (Pd), copper (Cu), and zinc (Zn) on graphitic-carbon nitride (g-C 3 N 4 ) and to study the potential of these catalysts in FA and mixed formic acid (FA)-acetic acid (AA) decomposition reaction. Several parameters have been studied in this work such as the type of active metals, temperature, and metal loadings. The mass percentage of Pd, Cu, and Zn metal used in this experiment are 1, 3, and 5 wt%, respectively. At low temperature of 30 °C, 5 wt% Pd/g-C 3 N 4 catalyst yielded higher volume of gas with 3.3 mL, instead of other Pd percentage loadings. However, at higher temperature of 70 °C and 98% FA concentration, Pd with 1 wt%, 3 wt%, and 5 wt% of loading over g-C 3 N 4 has successfully produced optimum gas (H 2 and CO 2 ) of 4.3 mL, 7.4 mL, and 4.5 mL in each reaction, respectively. At higher temperature, Pd metal showed high catalytic performance and the most active element of monometallic system in ambient condition. Meanwhile, at higher percentage of Pd metal, the catalytic decomposition reaction also increased thus producing more gas. However, it can be seen the agglomeration of the particles formed at higher loadings of Pd (5 wt%), and remarkably lowering the catalytic activity at higher temperature, while higher activity at low temperature of 30 °C. The result also showed low catalytic decomposition reaction for Cu and Zn catalyst, due to the small formation of Cu and Zn metal, but presence of high metal oxide (CuO) and (ZnO) promotes the passive layer formation on the catalyst surface.

Suggested Citation

  • Wan Nor Roslam Wan Isahak & Muhammad Nizam Kamaruddin & Zatil Amali Che Ramli & Khairul Naim Ahmad & Waleed Khalid Al-Azzawi & Ahmed Al-Amiery, 2022. "Decomposition of Formic Acid and Acetic Acid into Hydrogen Using Graphitic Carbon Nitride Supported Single Metal Catalyst," Sustainability, MDPI, vol. 14(20), pages 1-18, October.
  • Handle: RePEc:gam:jsusta:v:14:y:2022:i:20:p:13156-:d:941521
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    References listed on IDEAS

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    1. Duo Wei & Rui Sang & Peter Sponholz & Henrik Junge & Matthias Beller, 2022. "Reversible hydrogenation of carbon dioxide to formic acid using a Mn-pincer complex in the presence of lysine," Nature Energy, Nature, vol. 7(5), pages 438-447, May.
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