三种工业废料对石油焦CO2气化动力学的影响

Three industrial wastes including black liquor from papermaking industry, coal slag, and sludge were used as catalysts for petroleum cokeCO2 gasification. The gasification kinetics characteristics with and without catalyst were studied using a pressurized thermogravimetric analyzer (TGA). It is shown that gasification rate increases with increasing conversion and then decreases after reaching a maximal rate for noncatalytic gasification, while decreases in whole course for catalytic gasification. The proposed normal distribution function model describes well the kinetic curve for both noncatalytic and catalytic gasification. The calculated activation energy of noncatalytic petroleum cokeCO2 gasification is 197.7kJ/mol, which is in accordance with the reported data. The activities of three catalysts are contributed to the content of metal species. The black liquor in papermaking industry rich in Na species has the best activity, and its gasification rate is six times as that of noncatalytic gasification.