English
Русский 118-130 p.
Objectives: in this work, we evaluated the ability of the adsorbent of gas-vapor activated carbon obtained from the shells of macadamia nuts of one of the enterprises in Myanmar as an agent of the recovery technology using the example of the extraction of n-butanol vapors from their mixtures with air (AVM).
Methods. The object of the study was pre-dried macadamia nuts, which were crushed, heat treated at 650-700°C for 60 minutes in pyrolysis, followed by water vapor at a temperature rise of 15 °C/min without thermal ex-posure, the specific consumption of water vapor was 5 g per 1 g of the resulting activated carbon. The obtained sorbents were analyzed for the sorption properties of C6H6, CCL4 and H2O vapour. Their total volume was deter-mined, their porous structure was estimated by the volume of pores of various sizes, the absorption of iodine and methylene blue from aqueous solutions. Their ability to remove harmful gases during adsorption of n-butanol at different relative pressures was characterized and their adsorption kinetics and isotherms were studied.
Results. It is shown that the values of the coefficients obtained from the kinetic equation a = A(1-e-B·τ) of the obtained active carbons are preliminarily performed in their pores with butanol. According to the values of A and B, these sorbents are actively absorbed by harmful gases from the vapor-air mixture. For comparison, the article presents the quality indicators of active carbons of the CS (coconut shell) and PS (plum seed) brand made frоm a number of agricultural wastes of Myanmar.
Conclusions. The studies allow us to state quite satisfactory absorption properties of the obtained new activated carbon from the shell of macadamia nuts, in the studied process of extracting n-butanol vapors from their mixtures with air, which indicates the probable competitiveness of this adsorbent in solving the problems of purification from vapors of organic substances of emissions of high concentrations, provided that its production is organized in the conditions of Myanmar.
Methods. The object of the study was pre-dried macadamia nuts, which were crushed, heat treated at 650-700°C for 60 minutes in pyrolysis, followed by water vapor at a temperature rise of 15 °C/min without thermal ex-posure, the specific consumption of water vapor was 5 g per 1 g of the resulting activated carbon. The obtained sorbents were analyzed for the sorption properties of C6H6, CCL4 and H2O vapour. Their total volume was deter-mined, their porous structure was estimated by the volume of pores of various sizes, the absorption of iodine and methylene blue from aqueous solutions. Their ability to remove harmful gases during adsorption of n-butanol at different relative pressures was characterized and their adsorption kinetics and isotherms were studied.
Results. It is shown that the values of the coefficients obtained from the kinetic equation a = A(1-e-B·τ) of the obtained active carbons are preliminarily performed in their pores with butanol. According to the values of A and B, these sorbents are actively absorbed by harmful gases from the vapor-air mixture. For comparison, the article presents the quality indicators of active carbons of the CS (coconut shell) and PS (plum seed) brand made frоm a number of agricultural wastes of Myanmar.
Conclusions. The studies allow us to state quite satisfactory absorption properties of the obtained new activated carbon from the shell of macadamia nuts, in the studied process of extracting n-butanol vapors from their mixtures with air, which indicates the probable competitiveness of this adsorbent in solving the problems of purification from vapors of organic substances of emissions of high concentrations, provided that its production is organized in the conditions of Myanmar.
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4. Hirae H.K. and H.H. Common Problems of Macadamia Nut. Access mode: https://ru.wikipedia.org/wiki/Макадамия (date of access: 07.0.5.2024)
5. Macadamia integrifolia. Access mode: http://www.csbg.nsc.ru/catalog/macadamia-integrifolia-maiden-et-betche-makadamiya-tselnolistnaya.html (date of access: 10.02.2024)
6. Where is Myanmar, [electronic resource] Access mode: https://ru.wikipedia.org/wiki/Мянма (date of access: 06.05.2024)
7. Kiciker J. Macadamia Marketing System in Shan State, Myanmar. Access mode: https://www.ilo.org/sites/default/files/wcmsp5/groups/public/@ed_emp/@emp_ent/@ifp_seed/documents/publication/wcms_765026.pdf (date of access: 20.03.2020)
8. Melissa P. Macadamia plant in Britannica. Access mode: https://www.britannica.com/plant/macadamia (date of access: 29.05.2024)
9. Kurmanbekov A.S., Zhubanova A.A., Mansurov Z.A. Biosorbents based on carbonized apricot kernel and rice husk. Carbon Nanomaterials in Biomedicine and the Environment, Jenny Stanford Publishers, 2020. P. 41. ISBN-9780429428647
10. Kashyap P., Sonzu C., Hankwan L., Han S.B., Sangil H. Removal of Volatile Organic Compounds from Air Using Activated Carbon-Impregnated Cellulose Acetate. Environmental Engineering Research. 2019. Vol. 24. No 4. P. 600 – 607.
11. Alexander M.G., Alina M.G. Bottled and Packaged Water. Beverage Science. 2019. T. 4. P. 83 – 120.
12. Romanos J., Beckner M., Rash T., Firlej L., Kuchta B., Yu P., Suppes G., Wexler C., Pfeifer P. Nano-space engineering of KOH activated carbon. Nanotechnology. 2011. No. 23 (1). P. 015401. doi:10.1088/0957-4484/23/1/015401
13. Sahira Joshi, Rekha Goswami Shrestha, Raja Ram Pradhananga, Katsuhiko Ariga and Lok Kumar Shrestha High surface area nanoporous activated carbons materials from areca catechu nut with excellent iodine and meth-ylene blue fdsorption. Jorunal of carbon research. 2022. Vol 8 (1). P. 2. Access mode: https://doi.org/10.3390/c8010002
14. Kim D., Lee D., Hong I. NO reduction and oxidation by PAN on dream-ACF. Carbon Lett. Vol. 1. Pp. 12 – 17.
15. Sumati S., Bhatia S., Lee K.T., Mohamed A.R., “Optimization of palm shell microporous activated carbon production for flue gas desulfurization: experimental and statistical studies”, access mode: https://doi.org/10.1016/j.biortech.2008.09.020.607 (accessed: 22.05.2022)
16. Olga Kolos. Travels full of dreams [Electronic resource]. Access mode: http://olgakolos.ru/aziya/myanma-chast-13-pin-u-lvin/ (date accessed: 10.06.2024)
17. So Win Myint, Zaw Ye Naing, Nistratov A.V., Klushin V.N. Combustible fossils and plant waste of Myan-mar as raw materials for producing carbon adsorbents. Advances in Chemistry and Chemical Technology. 2024. Vol. XXXVIII. No. 8. P. 97 – 99.
18. Saw Win Myint, Zaw Ye Naing, Min Thu, Myat Min Thu, Klushin V.N. Inexpensive resources of Myanmar as a source of carbon adsorbents. International Journal of Modern Agriculture. 2020. Vol. 9. No. 3. P. 342 – 350. ISSN: 2305-7246.
19. Naing Linn Soe, Zin Mo, Min Thu, Myat Min Thu, Soe Win Myint, Nistratov A.V., Klushin V.N. Carbon adsorbents based on Myanmar plant waste as a means of cleaning industrial emissions and discharges. Sorption and chromatographic processes. 2019. Vol. 19. No. 5. P. 574 – 581.
20. Soe Hein Thu, Aung Kyaw San, Soe Win Myint, Naing Linn Soe, Klushin D.V., Klushin V.N. Rational conditions for pyrolysis of macadamia nut shells during its processing into carbon adsorbents. Advances in Chem-istry and Chemical Technology. 2024. Vol. XXXVIII. No. 3. P. 99 – 101.
Saw Win Myint, Zaw Ye Naing, Kurikin A.А., Nistratov A.V., Klushin V.N. Removal of harmful gases from the air stream using carbon sorbents based on plant waste of the Republic of the Union of Myanmar. Chemical Bulletin. 2024. 7 (4). P. 118 – 130. https://doi.org/10.58224/2619-0575-2024-7-4-118-130