Evaluation of the potential of replanted rubber wood and palm oil waste with coal as co-combustion fuels in a lab-scale combustion simulator: ash deposition aspects - Hariana Hariana; Adi Prismantoko; Suyatno Suyatno; Hafizh Ghazidin; Fairuz Milkiy Kuswa; Ade Sana Ruhiyat; Cuk Supriyadi Ali Nandar; Muhamad Iqbal Felani; Widi Pancono; Unggul Priyanto; Kusmiyati Kusmiyati; Hari B. Vuthaluru (Biomass and Bioenergy, 2025)