Pilot Studies On Viscous Oil Coking Process And High Quality Coke Production

This study was designed to separate viscous oil residue from raw materials, mixingthe thin oil residue, viscous oil heavy deasphalting-oil or extractive of petrol distillates with15wt% viscous oil residue, to generate obvious benefits with the preparation of 1B rankpetroleum coke. Utilizing the decalcifying agent KR-1 and cyclic technology developed bydomestic, the viscous oil is treated under the test condition: mole ratio of agent tocalcium1.2-1.5:1, water 8-10wt%, mix temperature less than 90℃. The metal and calciumcontent in purified oil can efficiently decrease (decalcifying efficiency to 82.5%). Evenmixed with 15wt% viscous oil residue, decalcifying efficiency of raw material can meet therequirement of preparation of 1B rank petroleum coke (calcium content of purified oil 37.9μg/g, total metal content less than 50μg/g). The result of active carbon preparation testindicates: utilizing water vapor to prepare active carbon under 850℃, yield is less than50%, peaked surface area is only 456.74 mg I₂/g (iodine adsorption). Also does it showthat, utilzing KOH as active agent under 800℃, alkali to carbon is large than 2:1(m/m),and can produce the active carbon for industrial water treatment with the surface areaexceed 1000 m²/g, and the yield of active carbon is as high as 80wt%. Result ofcarbonizing test of 1B rank coke shows: low sulfur content coke can prepare calcinedcoke for aluminum production and normal graphite electrode material. At last, industrialtest result shows that the total income increasing exceeds 13 million Yuan.