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Язык: АнглийскийТема: search.filters.subject.carbonization

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    PROCESSING OF RICE WASTES INTO ACTIVATED CARBON
    (2018-01-01)
    S. R. Bainazarova
    ;
    A. T. Shuragaziyeva
    ;
    Anipa Tapalova
    ;
    L. A. Zhusupova
    ;
    Nurbol Orynbasaruly Appazov
    A method for processing of rice wastes (husk, straw) into activated carbon was proposed. The thermolysis of raw material and the activation of carbonizate were carried out at 500oС and 800oС temperatures respectively. The properties of obtained activated carbon are determined by standard methods. The porous structure of obtained carbon have been studied under scanned electronic microscope. According to the results of experimental studies, activated charcoal obtained from rice husks corresponds to the WAC brand, activated charcoal obtained from rice straw corresponds to BAU-A grade. The research will allow rational use of agricultural waste in order to obtain useful secondary adsorbent products intended for adsorption and liquid media. References [1] Biswas B., Singh R., Kumar J., Singh R., Gupta P., Krishna B.B., Bhaskar T. Pyrolysis behavior of rice straw under carbon dioxide for production of bio-oil // Renewable energy. 2018. Vol. 129. P. 686-694. [2] Wu J., Collins S.R.A., Elliston A., Wellner N., Dicks J., Roberts I.N., Waldron K.W. Release of cell wall phenolic esters during hydrothermal pretreatment of rice husk and rice straw // Biotechnology for biofuels. 2018. Vol. 11. DOI: 10.1186/s13068-018-1157-1. [3] GOST 6217. Ugol' aktivnyj drevesnyj droblenyj. Tehnicheskie uslovija. M.: IPK Izd-vo standartov, 2003. [4] GOST R 56357-2015. Ugol' aktivirovannyj AG-3. Tehnicheskie uslovija. M.: Standartinform. 2016. [5] Kinle H., Bader Je. Aktivnye ugli i ih promyshlennoe primenenie. L.: Himija, 1984. 216 p. [6] Himicheskij jenciklopedicheskij slovar'. M.: Sovetskaja jenciklopedija, 1983. 19 p. [7] Arezou Niksiar, Bahram Nasernejad. Activated carbon preparation from pistachio shell pyrolysis and gasification in a spouted bed reactor // Biomass and Bioenergy. 2017. Vol. 106. P. 43-50. [8] Yeru Liang, Chen Yang, Hanwu Dong, Wenqi Li, Hang Hu, Yong Xiao, Mingtao Zheng, Yingliang Liu. Facile Synthesis of Highly Porous Carbon from Rice Husk // ACS Sustainable Chem. Eng., Just Accepted Manuscript. DOI: 10.1021/acssuschemeng.7b01315. Publ. (Web): 24.06.2017. [9] Wenli Zhang, Nan Lin, Debo Liu, Jinhui Xu, Jinxin Sha, Jian Yin, Xiaobo Tan, Huiping Yang, Haiyan Lu, Haibo Lin. Direct carbonization of rice husk to prepare porous carbon for supercapacitor applications // Energy. 2017. Vol. 128. P. 618-625. [10] Pred.patent RK №15933. Sposob poluchenija karbonizirovannogo sorbenta dlja izvlechenija zolota iz rastvorov // Data opubl. 15.07.2005, bjul. №7. Mansurov Z.A., Mansurova R.M., Nikolaeva A.F., Vasil'ev D.G. [11] Hoang Kim Bong, Timofeev V.S., Tjomkin O.N., Gafarov I.G., Timoshenko A.V., Artamonova T.V., Gorbacheva O.V., Kol'vah I.P., Mishulin G.M., Shhepakin M.B., Kozhura E.A., Haziev R.M., Vatolin A.K. Sposob poluchenija aktivirovannogo uglja iz othodov sel'skogo hozjajstva // Patent RF №2315712. Data opubl. 27.01.2008. [12] Muhin V.M., Voropaeva N.L., Karpachev V.V., Harlamov S.A., Spiridonov Ju.Ja., Gur'janov V.V., Dmitrjakova E.E. Sposob poluchenija aktivnogo uglja iz rastitel'nyh othodov // Patent RF №2527221. Data opubl. 27.08.2014. [13] Hanum F., Bani O., Wirani L.I. Characterization of Activated Carbon from Rice Husk by HCl Activation and Its Application for Lead (Pb) Removal in Car Battery Wastewater // IOP Conf. Series: Materials Science and Engineering 180 (2017) 012151 doi:10.1088/1757899X/180/1/012151. [14] Hanum F., Bani O., Izdiharo A.M. Characterization of Sodium Carbonate (Na2CO3) Treated Rice Husk Activated Carbon and Adsorption of Lead from Car Battery Wastewater // IOP Conf. Series: Materials Science and Engineering 180 (2017) 012149 doi:10.1088/1757899X/180/1/012149. [15] Yeru Liang, Chen Yang, Hanwu Dong, Wenqi Li, Hang Hu, Yong Xiao, Mingtao Zheng, Yingliang Liu. Facile Synthesis of Highly Porous Carbon from Rice Husk // ACS Sustainable Chem. Eng., Just Accepted Manuscript. DOI: 10.1021/ acssuschemeng.7b01315. 262[16] GOST 17219. Ugli aktivnye. Metod opredelenija summarnogo obema por po vode. M.: Izdatel'stvo standartov, 1988. [17] GOST 12597. Sorbenty. Metod opredelenija massovoj doli vody v aktivnyh ugljah i katalizatorah na ih osnove. M.: Izdatel'stvo standartov, 1989. [18] GOST 16190. Sorbenty. Metod opredelenija nasypnoj plotnosti. M.: Izdatel'stvo standartov, 1970.
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    Production of activated carbon granulated by treatment of rice husk and straw with an oil sludge using polyvinyl acetate as a binder
    (2023-09-05)
    Banu Diyarova
    One of the man-made problems of technological development is the processing and utilization of oil and agricultural wastes. In this study, the process of obtaining granular activated carbon from the agricultural rice waste was investigated. The granules were obtained using polyvinyl acetate, which binds rice residue and oil sludge. Carbonization and activation were carried out in a quartz glass tube inside of high-temperature vacuum furnace BR-12 NFT series. The length of the furnace is 300 mm, the diameter is 60 mm and the operating heating length is 200 mm. Carbonization was performed at a temperature of 500 °C, activation of carbonizate with water vapor in ratio 1:2 at a temperature of 850 °C. The effect of polyvinyl acetate, rice waste, oil sludge ratio on the product characteristics was analyzed, the most advantageous ratio for obtaining granular activated carbon was identified. The iodine adsorption activity of the granulated activated carbon, the total pore size, the mass fraction of moisture, the methylene blue adsorption activity and bulk density were determined. According to the results, the product obtained by using the rice husk, oil sludge and binder in a ratio by mass 9:1:1.1 corresponds to the DAK type of wood crushed activated carbon standard (GOST 6217-74).
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    Joule-heat derived amorphous/graphitic polymer nanotubes with enhanced electromagnetic wave absorption and high thermal conductivity
    (Elsevier BV, 2025-05-16)
    Yang Cao
    ;
    Xinfei Zeng
    ;
    Jingtao Su
    ;
    Wentao Yu
    ;
    Haichen Zhang
    The rapid advancement of artificial intelligence demands multifunctional materials integrating electromagnetic wave absorption (EWA) and thermal management capabilities for next-generation electronics. Herein, a facile and scalable Joule-heating carbonization strategy is proposed to regulate the amorphous-to-graphitic phase ratio in polymer nanotubes, achieving a precise modulation of EWA performance. The nitrogen species transformation during carbonization induced enhanced polarization relaxation, defect generation, and dipole polarization, synergistically facilitating charge transfer. Polypyrrole-based polymer nanotubes treated at 1000 o C (PNT-1000) exhibited a maximum effective absorption bandwidth of 3.46 GHz and a minimum reflection loss of −45.1 dB. Moreover, PNT-1000@polydimethylsiloxane (PDMS) demonstrated a thermal conductivity of 2.26 W/(mK), while PNT-2000@PDMS achieved a significantly higher thermal conductivity of 4.20 W/(mK). This work systematically elucidated the interaction between amorphous and graphitic phases in controlling both EWA and thermal conductivity, which is helpful for applying carbon-based materials in these advanced fields.
    Цитирования (OpenAlex) 68Цитирования (OpenCitations) 43