Pyrolysis and modification of coconut shell into sulfonated biochar and its catalytic activity on cellobiose conversion

Authors

  • Addy RACHMAT Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Jl. Palembang-Prabumulih KM-35, Inderalaya 30662, South Sumatera, Indonesia
  • Yessi Eka WAHYU Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Jl. Palembang-Prabumulih KM-35, Inderalaya 30662, South Sumatera, Indonesia
  • Poedji Loekitowati HARIANI Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Jl. Palembang-Prabumulih KM-35, Inderalaya 30662, South Sumatera, Indonesia
  • Fahma RIYANTI Department of Chemistry, Faculty of MathematiDepartment of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Jl. Palembang-Prabumulih KM-35, Inderalaya 30662, South Sumatera, Indonesiacs and Natural Sciences, University of Sriwijaya, Jl. Palembang-Prabumulih KM-35, Inderalaya 30662, South Sumatera, Indonesia
  • Fatma FATMA Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Jl. Palembang-Prabumulih KM-35, Inderalaya 30662, South Sumatera, Indonesia

DOI:

https://doi.org/10.55713/jmmm.v35i3.2271

Keywords:

coconut shell, pyrolysis, sulfonated biochar, cellulose hydrolysis

Abstract

Coconut shell was successfully valorized into sulfonated biochar through carbonization in various temperatures and duration. This work aims to provide suitable solid acid carbonaceous catalyst for cellobiose conversion into valuable product. Sulfonated biochar is characterized to evaluate its crystallinity, sulfonate, and oxygenated functional groups by XRD method and FTIR spectroscopy. The resulting solid acid carbonaceous material was tested toward cellobiose hydrolysis to assess its catalytic activity in various time, temperature, and catalyst weight. FTIR spectra reveals some of the biochar product has sulfonate group as indicated by absorbance band at 1234 cm1, 1070 cm1 and 1180 cm1, which belongs to -SO3H and O=S=O vibration. The most noticeable spectra are found on biochar prepared at 800℃ in 1.5 h to 2 h carbonization. Diffraction pattern shows similar peak that characteristic of biochar at 2θ 23 and 44°. Long duration process and higher temperature of carbonization affects the product to becomes less crystalline and smaller amplitude. Catalytic activity of sulfonated biochar toward cellobiose hydrolysis shows mixed result of total reducing sugar yield. Overall, sulfonated biochar able to hydrolyze cellobiose at optimum condition 12 h and 150℃ resulting in total reducing sugar by 178 ppm.

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Published

2025-08-27

How to Cite

[1]
A. RACHMAT, Y. E. WAHYU, P. L. HARIANI, F. RIYANTI, and F. FATMA, “Pyrolysis and modification of coconut shell into sulfonated biochar and its catalytic activity on cellobiose conversion”, J Met Mater Miner, vol. 35, no. 3, p. e2271, Aug. 2025.

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