Influence of pretreated coconut shell on gasification product yieldS.Z. Muda, R. Ahmad, S.A. Mohammed, W.A.M. Wan Ahmad, V. Vijean, R. Santiagoo, N.R. Ibrahim and A.Y. AniE3S Web Conf., 437 (2023) 03012DOI: https://doi.org/10.1051/e3sconf/202343703012