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Crystallized mesoporous carbon was produced from ligno- p -cresol, a lignin derivative obtained by phase separation with  p -cresol and sulfuric acid, onto which 3% nickel and 2% calcium were co-loaded, by carbonization at 900°C. Subsequent pulverization followed by soaking in acid improved the crystallinity of carbon with an increased volume of mesopore, attaining approximately 90% and 99% removal of nickel and calcium, respectively. These aspects implied both enhancement of electroconductivity and liquid phase adsorption capacity of the carbon with a good outlook on the recovery and reuse of the two metals. In particular, combination of wet milling using small beads and mild soaking with diluted acid was appropriate in respect of relevant properties of the carbon, including the particle size. It can thus be concluded that incorporation of such post-treatments into the manufacturing process of carbon products is greatly advantageous.

Crystallinity and mesoporosity of carbon produced from ligno- p -cresol and their improvement by pulverization and acid treatment