Conversion of petroleum coke into valuable products using oxy-cracking technique

•Oxy-cracking process is conducted as an alternative approach to petcoke utilization.•The process was optimized for high conversion, selectively and small amount of CO2.•The petcoke oxidation undergoes in parallel consecutive reactions.•The oxy-cracked petcoke was found to be carboxylic and phenolic acids and their salt.•The oxy-cracking technique could be employed for petcoke demineralization.