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  • Open Access

    ARTICLE

    Characterization of Unsaturated Polyester Filled with Waste Coconut Shells, Walnut Shells, and Carbon Fibers

    Marwah Subhi Attallah, Reem Alaa Mohammed*, Ruaa Haitham Abdel-Rahim

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.10, pp. 2449-2469, 2023, DOI:10.32604/fdmp.2023.027750

    Abstract This study aims to evaluate the erosion behavior and the hardness of hybrid composites made of varying amounts of coconut shells, walnut shells, and carbon fibers dispersed in a polyester matrix. MINITAB (L16) Taguchi experiments were used to determine the optimal combination of parameters. In particular, an erosion device consisting of a motor with a constant flow rate of 45 L/min, a pump with a diameter of 40 mm, a nozzle with a diameter of 5 mm, and a tank made of “perspex glass” 55 cm long, 30 cm tall, and 25 cm wide was used. The tests were conducted by varying the sample-to-nozzle distance, the… More > Graphic Abstract

    Characterization of Unsaturated Polyester Filled with Waste Coconut Shells, Walnut Shells, and Carbon Fibers

  • Open Access

    ARTICLE

    N-Doped rGO-Like Carbon Prepared from Coconut Shell: Structure and Specific Capacitance

    Imam Khambali1,2,*, Budhi Priyanto1,2, Retno Asih1, Malik Anjelh Baqiya1, Muhammad Mahyiddin Ramli3, Nurul Huda Osman4, Sarayut Tunmee5, Hideki Nakajima5, Triwikantoro1, Mochamad Zainuri1, Darminto1,*

    Journal of Renewable Materials, Vol.11, No.4, pp. 1823-1833, 2023, DOI:10.32604/jrm.2023.025026

    Abstract An rGO−like carbon compound has been synthesized from biomass, i.e., old coconut shell, by a carbonization process followed by heating at 400°C for 5 h. The nitrogen doping was achieved by adding the urea (CH4N2O) and stirring at 70°C for 14 h. The morphology and structure of the rGO-like carbon were investigated by electron microscopies and Raman spectroscopy. The presence of C-N functional groups was analyzed by Fourier transform infrared and synchrotron X-ray photoemission spectroscopy, while the particle and the specific capacitance were measured by particle sizer and cyclic voltammetry. The highest specific capacitance of 72.78 F/g is achieved by… More > Graphic Abstract

    N-Doped rGO-Like Carbon Prepared from Coconut Shell: Structure and Specific Capacitance

  • Open Access

    ARTICLE

    Study on Coconut Shell Activated Carbon Temperature Swing Adsorption of Benzene and Formaldehyde

    Zhiguang Yang1,*, Gaojun Yan1,2, Xueping Liu1, Zhengyuan Feng1, Xinfeng Zhu1, Yanli Mao1, Songtao Chen1, Zhisheng Yu2, Ruimei Fan3, Linlin Shan3,*

    Journal of Renewable Materials, Vol.10, No.12, pp. 3573-3585, 2022, DOI:10.32604/jrm.2022.022031

    Abstract Adsorption can be used to recover effectively the volatile organic gases (VOCs) in the exhaust gas from factories through using an appropriate adsorption bed. Due to form a physical or chemical bond, adsorption occurs between the porous solid medium and the liquid or gas multi-component fluid mixture. The regeneration capacity of the adsorbent is as important as the adsorption capacity and it determines the economics of the adsorption system. The regeneration of adsorbent can be realized through changing the pressure or temperature of the system. Here, activated carbon samples from coconut shell were prepared and characterized. Benzene or formaldehyde in… More > Graphic Abstract

    Study on Coconut Shell Activated Carbon Temperature Swing Adsorption of Benzene and Formaldehyde

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