TRIAL PRODUCTION OF BIOCHAR PELLETS FROM  DE-OILED CASHEW NUT SHELLS

Nguyễn Thành Vinh; Lâm Ngọc Hân; Hồ Phùng Ngọc Thảo; Hồ Thị Thanh Hiền

doi:10.34238/tnu-jst.11673

TRIAL PRODUCTION OF BIOCHAR PELLETS FROM DE-OILED CASHEW NUT SHELLS

About this article

Received: 10/12/24 Revised: 22/01/25 Published: 22/01/25

Authors

1. Nguyen Thanh Vinh, Faculty of Environment - Van Lang University - Ho Chi Minh City - Vietnam
2. Lam Ngoc Han, Faculty of Environment - Van Lang University - Ho Chi Minh City - Vietnam
3. Ho Phung Ngoc Thao, Faculty of Environment - Van Lang University - Ho Chi Minh City - Vietnam
4. Ho Thi Thanh Hien , Faculty of Environment - Van Lang University - Ho Chi Minh City - Vietnam

Abstract

The energy crisis and global warming create great pressure on the development of renewable energy and dependence on fossil fuels. In Vietnam, the cashew nut processing industry, with an annual capacity of about 3 million tons, is estimated to produce 1.5 million tons of cashew residue per year. Although this amount of cashew residue is used as fuel for boilers and furnaces in industrial production, the combustion of raw cashew residue generates toxic gas emissions and hazardous ash and slag that need appropriate treatments. This study was conducted to produce biochar pellets from de-oiled cashew nut shells on a trial basis. The slow pyrolysis process was applied to prepare biochar which was then mixed with cassava starch-derived binder and pressed into a mold to form biochar pellets. The results showed that the de-oiled cashew nut shells-derived biochar pellets achieved the best quality at a pyrolysis temperature of 350°C for 3 hours with a binder ratio of 20%. The pellets also had high calorific value equivalent to sub-bitum coal, charcoal, and wood. The thermal efficiency, specific fuel consumption, and firepower values demonstrated that the pellets provided better energy efficiency than the coal from the market. Biochar pellets derived from de-oiled cashew nut shells can replace charcoal and coal, while promoting efficient resource use and environmental protection.

Keywords

Biochar pellets; De-oiled cashew nut shells; Slow pyrolysis; Renewable fuels; Bioenergy

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References

[1] H. Liem, "Vietnam continues to lead the world in cashew nut exports,” (in Vietnamese), 2023. [Online]. Available: https://nhandan.vn/viet-nam-tiep-tuc-dung-dau-the-gioi-ve-xuat-khau-nhan-dieu-post687169.html. [Accessed November 25, 2024].

[2] T. T. Lang, "Research on developing wastewater and solid waste emission coefficients in the cashew processing industry in Binh Phuoc province,” (in Vietnamese), Department of Science and Technology of Binh Phuoc province, Binh Phuoc, 2018.

[3] J. B. Josino, D. S. Serra, M. D. M. Gomes, R. S. Araújo, M. L. M. de Oliveira, and F. S. Á. Cavalcante, "Changes of respiratory system in mice exposed to PM4.0 or TSP from exhaust gases of combustion of cashew nut shell," Environmental Toxicology and Pharmacology, vol. 56, pp. 1-9, 2017, doi: 10.1016/j.etap.2017.08.020.

[4] M. Njenga, N. Karanja, H. Karlsson, R. Jamnadass, M. Iiyama, J. Kithinji, and C. M. Sundberg, "Additional cooking fuel supply and reduced global warming potential from recycling charcoal dust into charcoal briquette in Kenya," Journal of Cleaner Production, vol. 81, pp. 81-88, 2014, doi: 10.1016/j.jclepro.2014.06.002.

[5] W.-H. Chen, J. Peng, and X. T. Bi, "A state-of-the-art review of biomass torrefaction, densification and applications," Renewable and Sustainable Energy Reviews, vol. 44, pp. 847-866, 2015, doi: 10.1016/j.rser.2014.12.039.

[6] M. Sawadogo, S. T. Tanoh, S. Sidibé, N. Kpai, and I. Tankoano, "Cleaner production in Burkina Faso: Case study of fuel briquettes made from cashew industry waste," Journal of Cleaner Production, vol. 195, pp. 1047-1056, 2018, doi: 10.1016/j.jclepro.2018.05.261.

[7] P. D. C. Sanchez, M. M. T. Aspe, and K. N. Sindol, "An overview on the production of bio-briquettes from agricultural wastes: methods, processes, and quality," Journal of Agricultural and Food Engineering, vol. 1, p. 17, 2022, doi: 10.37865/jafe.2022.0036.

[8] L. Ifa, "Production of bio-briquette from biochar derived from pyrolysis of cashew nut waste," Ecology, Environment and Conservation, vol. 25, pp. 125-131, 2019.

[9] I. E. Onukak, I. A. Mohammed-Dabo, A. O. Ameh, S. I. R. Okoduwa, and O. O. Fasanya, "Production and characterization of biomass briquettes from tannery solid waste," Recycling, vol. 2, no. 4, 2017, doi: 10.3390/recycling2040017.

[10] G. Zhang, Y. Sun, and Y. Xu, "Review of briquette binders and briquetting mechanism," Renewable and Sustainable Energy Reviews, vol. 82, pp. 477-487, 2018, doi: 10.1016/j.rser.2017.09.072.

[11] Y. Sun, F. Li, Y. Luan, P. Li, X. Dong, M. Chen, L. Dai, and Q. Sun, "Gelatinization, pasting, and rheological properties of pea starch in alcohol solution," Food Hydrocolloids, vol. 112, 2021, Art. no. 106331, doi: 10.1016/j.foodhyd.2020.106331.

[12] A. Bahadori, G. Zahedi, S. Zendehboudi, and A. Jamili, "Estimation of the effect of biomass moisture content on the direct combustion of sugarcane bagasse in boilers," International Journal of Sustainable Energy, vol. 33, no. 2, pp. 349-356, 2014, doi: 10.1080/14786451.2012.748766.

[13] A. D. Igalavithana, S. Mandal, N. K. Niazi, M. Vithanage, S. J. Parikh, F. N. D. Mukome, M. Rizwan, P. Oleszczuk, M. Al-Wabel, N. Bolan, D. C. W. Tsang, K. H. Kim, and Y. S. Ok, "Advances and future directions of biochar characterization methods and applications," Critical Reviews in Environmental Science and Technology, vol. 47, no. 23, pp. 2275-2330, 2017, doi: 10.1080/10643389.2017.1421844.

[14] Clean Cooking Alliance, “The Water Boiling Test Version 4.2.3 - Cookstove Emissions and Efficiency in a Controlled Laboratory Setting,” 2014. [Online]. Available: https://cleancooking.org/research-evidence-learning/standards-testing/protocols/. [Accessed September 15, 2024].

[15] R. Kaur, V. Tarun Kumar, B. B. Krishna, and T. Bhaskar, "Characterization of slow pyrolysis products from three different cashew wastes," Bioresource Technology, vol. 376, 2023, Art. no. 128859, doi: 10.1016/j.biortech.2023.128859.

[16] N. Supatata, J. Buates, and P. Hariyanont, "Characterization of fuel briquettes made from sewage sludge mixed with water hyacinth and sewage sludge mixed with sedge," International Journal of Environmental Science and Development, vol. 4, no. 2, p. 179, 2013, doi: 10.7763/IJESD. 2013.V4.330.

[17] S. Ogunwolu, F. Henshaw, H. Mock, and A. Matros, "Production of protein concentrate and isolate from cashew (Anacardium occidentale L.) nut," African Journal of Food, Agriculture, Nutrition and Development, vol. 10, no. 5, 2010, doi: 10.4314/ajfand.v10i5.56334.

[18] C. R. Lohri, H. M. Rajabu, D. J. Sweeney, and C. Zurbrügg, "Char fuel production in developing countries – A review of urban biowaste carbonization," Renewable and Sustainable Energy Reviews, vol. 59, pp. 1514-1530, 2016, doi: 10.1016/j.rser.2016.01.088.

[19] Ministry of Science and Technology of Vietnam, TCVN 8910:2020 Commercial coal – Specifications, (in Vietnamese), Ha Noi, Vietnam, 2020.

[20] S. U. Yunusa, E. Mensah, K. Preko, S. Narra, A. Saleh, and S. Sanfo, "A comprehensive review on the technical aspects of biomass briquetting," Biomass Conversion and Biorefinery, vol. 14, no. 18, pp. 21619-21644, 2024, doi: 10.1007/s13399-023-04387-3.

[21] European Committee for Standardization, EN 1860-2:2023 Appliances, solid fuels and firelighters for barbecueing - Part 2: Barbecue charcoal and barbecue charcoal briquettes-Requirements and test methods, Brussels, Belgium, 2023.

[22] A. P. Jaya and M. S. Sihotang, "Manufacture of briquettes from baking filter dust (BFD) waste and coconut shell charcoal," Journal of Technomaterial Physics, vol. 4, no. 2, pp. 157-166, 2022.

[23] The Engineering ToolBox, "Fuels - Higher and Lower Calorific Values," 2003. [Online]. Available: https://www.engineeringtoolbox.com/fuels-higher-calorific-values-d_169.html. [Accessed November 13, 2024].

[24] B. Ghiasi, L. Kumar, T. Furubayashi, C. J. Lim, X. Bi, C. S. Kim, and S. Sokhansanj, "Densified biocoal from woodchips: Is it better to do torrefaction before or after densification?," Applied Energy, vol. 134, pp. 133-142, 2014, doi: 10.1016/j.apenergy.2014.07.076.

DOI: https://doi.org/10.34238/tnu-jst.11673

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