Traditional charcoal production methods do have certain energy consumption, mainly reflected in raw material processing, carbonization process and equipment operation. Wood or biomass raw materials need to go through pre-treatment processes such as drying and cutting, which consume some energy. The carbonization process itself needs to maintain a certain temperature, and the traditional charcoal kiln method has a large heat loss and relatively low energy efficiency.
However, modern charcoal production technology has significantly improved this problem.
Source: Metalsrecycling