Potential Alternative Energy of Hybrid Coal from Co-pyrolysis of Lignite with Palm Empty Fruit Bunch and the Kinetic Study

Rinny Jelita, Iryanti Fatyasari Nata, Chairul Irawan, J. Jefriadi, Meda Nur Anisa, Muhammad Jauhar Mahdi, Meilana Dharma Putra


Lignite is classified as a low-rank coal due to its low content of calories. Co-pyrolysis with biomass waste such as palm empty fruit bunches (EFB) here can be used to increase lignite’s economic value. The mixture of these two materials can produce an alternative energy source called hybrid coal (HC). This study aims to determine the optimum temperature for co-pyrolysis of lignite and EFB as well as characterize liquid (tar) and solid product (HC). Its kinetic study was evaluated as well. A raw material of 200 grams with a composition of 22.5% (w/w) EFB to lignite was put into a reactor to react at a temperature range of 300-450oC for 1 hour. To form hybrid coal briquettes (HCB),tapioca adhesive with a concentration of 6% (w/w) was added to the solid product (HC). The results showed that the tar yield increased with increasing temperature from 300 to 450oC. Similarly, the calorific value of HC increased by 14.50% as also occurred in other physical properties of HC. Meanwhile, the kinetic study revealed that the model was well-fitted to the data, and confirmed the obtained results. Thus, this research can support the development of affordable alternative energy to be implemented in large-scale production.


Alternative energy; Co-pyrolysis; Empty fruit bunch; Hybrid coal; Lignite

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Abdelsayed, V., Ellison, C. R., Trubetskaya, A., Smith, M. W., and Shekhawat, D. (2019). Effect of microwave and thermal co-pyrolysis of low-rank coal and pine wood on product distributions and char structure. Energy and Fuels, 33(8), 7069-7082.

Bajwa, D. S., Peterson, T., Sharma, N., Shojaeiarani, J., and Bajwa, S. G. (2018). A review of densified solid biomass for energy production. Renewable and Sustainable Energy Reviews, 96, 296-305.

Byambajav, E., Paysepar, H., Nazari, L., and Xu, C. C. (2018). Co-pyrolysis of lignin and low rank coal for the production of aromatic oils. Fuel Processing Technology, 181, 1-7.

Chen, X., Liu, L., Zhang, L., Zhao, Y., Qiu, P., and Ruan, R. (2020). A review on the properties of copyrolysis char from coal blended with biomass. Energy and Fuels, 34(4), 3996-4005.

Duranay, N. D., and Akkuş, G. (2021). Solid fuel production with torrefaction from vineyard pruning waste. Biomass Conversion and Biorefinery, 11(6), 2335-2346.

Gouws, S. M., Carrier, M., Bunt, J. R., and Neomagus, H. W. (2021). Co-pyrolysis of coal and raw/torrefied biomass: A review on chemistry, kinetics and implementation. Renewable and Sustainable Energy Reviews, 135, 110189.

Huang, Y., Liu, H., Yuan, H., Zhan, H., Zhuang, X., Yuan, S., and Wu, C. (2018). Relevance between chemical structure and pyrolysis behavior of palm kernel shell lignin. Science of the Total Environment, 633, 785-795.

Huang, Y., Wang, N., Liu, Q., Wang, W., and Ma, X. (2019). Co-pyrolysis of bituminous coal and biomass in a pressured fluidized bed. Chinese Journal of Chemical Engineering, 27(7), 1666-1673.

Ifa, L., Yani, S., Nurjannah, N., Darnengsih, D., Rusnaenah, A., Mel, M., and Kusuma, H. S. (2020). Techno-economic analysis of bio-briquette from cashew nut shell waste. Heliyon, 6(9), e05009.

Ismail, T. M., Banks, S., Yang, Y., Yang, H., Chen, Y., Bridgwater, A., and Abd El-Salam, M. (2020). Coal and biomass co-pyrolysis in a fluidized-bed reactor: Numerical assessment of fuel type and blending conditions. Fuel, 275, 118004.

Karimi, K., and Taherzadeh, M. J. (2016). A critical review of analytical methods in pretreatment of lignocelluloses: composition, imaging, and crystallinity. Bioresource Technology, 200, 1008-1018.

Kongprasert, N., Wangphanich, P., and Jutilarptavorn, A. (2019). Charcoal briquettes from madan wood waste as an alternative energy in Thailand. Procedia Manufacturing, 30, 128-135.

Leng, L., Xiong, Q., Yang, L., Li, H., Zhou, Y., Zhang, W., and Huang, H. (2021). An overview on engineering the surface area and porosity of biochar. Science of the total Environment, 763, 144204.

Ma, Z., Yang, Y., Wu, Y., Xu, J., Peng, H., Liu, X., and Wang, S. (2019). In-depth comparison of the physicochemical characteristics of bio-char derived from biomass pseudo components: Hemicellulose, cellulose, and lignin. Journal of Analytical and Applied Pyrolysis, 140, 195-204.

Martín-Lara, M., Ronda, A., Zamora, M., and Calero, M. (2017). Torrefaction of olive tree pruning: Effect of operating conditions on solid product properties. Fuel, 202, 109-117.

Mohammed, I. Y., Abakr, Y. A., Yusup, S., and Kazi, F. K. (2017). Valorization of Napier grass via intermediate pyrolysis: Optimization using response surface methodology and pyrolysis products characterization. Journal of Cleaner Production, 142, 1848-1866.

Muigai, H. H., Choudhury, B. J., Kalita, P., and Moholkar, V. S. (2020). Co–pyrolysis of biomass blends: Characterization, kinetic and thermodynamic analysis. Biomass and Bioenergy, 143, 105839.

Saddawi, A., Jones, J., Williams, A., and Wojtowicz, M. (2010). Kinetics of the thermal decomposition of biomass. Energy and Fuels, 24(2), 1274-1282.

Saeed, S., Saleem, M., and Durrani, A. (2020). Thermal performance analysis and synergistic effect on co-pyrolysis of coal and sugarcane bagasse blends pretreated by trihexyltetradecylphosphonium chloride. Fuel, 278, 118240.

Sasongko, D., Wulandari, W., Rubani, I. S., and Rusydiansyah, R. (2017). Effects of biomass type, blend composition, and co-pyrolysis temperature on hybrid coal quality. AIP Conference Proceedings, 1805(1), 040009.

Shariff, A., Mohamad Aziz, N. S., Ismail, N. I., and Abdullah, N. (2016). Corn Cob as a Potential Feedstock for Slow Pyrolysis of Biomass. Journal of Physical Science, 27(2), 123-137.

Tong, S., Sun, Y., Li, X., Hu, Z., Dacres, O. D., Worasuwannarak, N., and Yao, H. (2020). Gas-pressurized torrefaction of biomass wastes: Roles of pressure and secondary reactions. Bioresource Technology, 313, 123640.

Ujjinappa, S., and Sreepathi, L. K. (2018). Production and quality testing of fuel briquettes made from pongamia and tamarind shell. Sādhanā, 43(4), 58.

Wang, T., Yang, Q., Wang, Y., Wang, J., Zhang, Y., and Pan, W.-P. (2020). Arsenic release and transformation in co-combustion of biomass and coal: Effect of mineral elements and volatile matter in biomass. Bioresource Technology, 297, 122388.

Wu, Z., Ma, C., Jiang, Z., and Luo, Z. (2019). Structure evolution and gasification characteristic analysis on co-pyrolysis char from lignocellulosic biomass and two ranks of coal: Effect of wheat straw. Fuel, 239, 180-190.

Yeo, J. Y., Chin, B. L. F., Tan, J. K., and Loh, Y. S. (2019). Comparative studies on the pyrolysis of cellulose, hemicellulose, and lignin based on combined kinetics. Journal of the Energy Institute, 92(1), 27-37.

Yogalakshmi, K. N., Sivashanmugam, P., Kavitha, S., Kannah, Y., Varjani, S., AdishKumar, S., and Kumar, G. (2022). Lignocellulosic biomass-based pyrolysis: A comprehensive review. Chemosphere, 286, 131824.

Zhang, S., Dong, Q., Zhang, L., and Xiong, Y. (2016). Effects of water washing and torrefaction on the pyrolysis behavior and kinetics of rice husk through TGA and Py-GC/MS. Bioresource Technology, 199, 352-361.

Zhuang, Z., Wang, L., and Tang, J. (2021). Efficient removal of volatile organic compound by ball-milled biochars from different preparing conditions. Journal of Hazardous Materials, 406, 124676.

DOI: https://doi.org/10.17509/ijost.v8i1.53149


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