Progress on preparation of biochar and its application in energy and environment
Biomass is a kind of natural,abundant,and renewable high carbon resource.Developing renewable carbon resources to replace fossil fuels for carbon-based material preparation is of great significance.This paper reviewed the research progress in preparation methods of biochar(pyrolysis,hydrothermal carbonization,activation,and template methods)and its application in energy(super capacitors and fuel cells)and environment(water pollution control,soil improvement,and air pollution control).Future research can focus on the following aspects to promote the large-scale engineering application of biochar.These aspects include the study on the adsorption and degradation mechanism of pollutants by biochar,environmental risk assessment of biochar,and the analysis of the life cycle carbon footprint of biochar.