Preparation Of Biiomass-Based Activated Carbon Process Development

Using Agriculture and forestry waste as raw material for the preparation of activated carbon is a hot point of research in the cleaning utilization technology of biomass energy. It has broad space for development. The process development studies was carried out using molten salt as carrier of pyrolysis, solvent and catalyst for rapid pyrolysis of biomass and activating carbon residue in this paper.Study on the yield and adsorption of activated carbon that use crop straw as raw material to produce activated carbon in the self-designed reactor was carried out in this paper, discussing the effects of adsorption activation temperature, activation time and ZnCl2-to-carbon ratio. Activated carbon adsorption process with the temperature (400℃-500℃) increase to rise; activation time on the effects of activated carbon adsorption is the reaction of 1hour>1.5hours>0.5hours; ZnCl2-to-carbon ratio=2 is the minimum activated carbon adsorption, ZnCl2-to-carbon ratio=3 and ZnCl2-to-carbon ratio=4 the results of the inter-level, not significantly different. The suitable conditions were activation temperature 600℃, activation time 1h, ZnCl2-to-carbon ratio=3 according to the experimental data and the orthogonal experimentAn industrial production line for producing 200 tons of activated carbon per year was designed in the paper, material balance, equipment design and the preliminary selection, process flow diagrams and preliminary economic accounting was included. According to design results, output value is 1.2 million to 1.3 million RMB per year. The total revenue and net profit is 9.6 to 10.4 million RMB and 260,000 RMB per year, respectively. The investment payback period is 1 to 2 years. In all,it is economic profitable.