Research status and prospects of tobacco in the field of fuel preparation.

In order to avoid environmental pollution and resource waste produced during the production and processing of tobacco, this paper systematically reviewed the current status of fuel utilization of tobacco and its wastes and showed that: The preparation method of tobacco solid fuel was simple and convenient, but the requirements for equipment were high. Among them, tobacco briquette charcoal was more easily transported and stored, clean and environmentally friendly, furthermore, the combustion residue could also be used for secondary utilization in agriculture. The preparation method of liquid fuel preparation was relatively mature. The operation of the direct extraction technology was simple, but the bio-oil yield depended on the inherent fat content in tobacco raw materials. Therefore, it required higher requirements for tobacco varieties. The thermal chemical conversion method belonged to a chemical process with high energy consumption, but there is a large space for innovation with regard to the preparation method. The chemical composition of liquid fuels could be adjusted, having a huge development potential. The fermentation method produced a single product, mainly ethanol, with low efficiency at present. There has been no breakthrough in the pretreatment technology for scalable application of tobacco raw materials throughout the entire technical chain. The preparation method of gaseous fuel was still in the exploration stage, with high energy consumption and low yield. The tech-economic feasibility was poor. In the future, much more attention should be paid on tobacco briquette charcoal, tobacco fermentation for fuel ethanol production, tobacco catalytic pyrolysis for liquid fuel, as well as the cultivation of novel tobacco varieties targeted towards specific energy purpose. This will further promote the industrialized development of multiple purposes of tobacco. [ABSTRACT FROM AUTHOR]