Abstract
Green recycling of poly(lactic acid) (PLA) has become the future trend for its large-scale application to cope with the “white pollution” associated. In the present study, solvent-free catalytic hydrogenolysis of PLA powder was developed with a carbon utilization of 99 % and 100 % conversion. The primary products were oxygenated liquid fuels with HHV = 29.9 MJ/kg and CO gas (∼99 %, disregard of hydrogen reactant) without the formation of any solid residues. Such hydrogenolysis process was further verified by discarded PLA straws, which possessed 95 % carbon recovery, and the derived oil held an HHV = 30.3 MJ/kg. Benefiting from the solvent-free process and near-zero-waste products, this technique provides an extraordinarily sustainable pathway for recycling PLA and its spent plastics.
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