Combustion of spent adsorbents containing HPNA compounds in a membrane wall partial oxidation gasification reactor

An integrated process for the gasification of a spent adsorbent material containing HPNA compounds and HPNA precursors to produce a hydrogen and carbon monoxide synthesis gas, the spent adsorbent material being recovered from an adsorption column used to treat a hydrocarbon oil stream comprising hydrocracker unit bottoms and hydrocracker recycle streams, the process comprising:

• a. discontinuing the flow of the hydrocarbon oil stream to the adsorption column;
• b. draining the remaining hydrocarbon oil from the adsorption column;
• c. introducing a distillate flushing solvent boiling in the range of 36° C. to 370° C. into the adsorption column to remove soluble hydrocarbon oil compounds from the adsorbent material;
• d. further treating the spent adsorbent material in the adsorption column or in a stripping zone to dry the spent adsorbent material to reduce the amount of retained hydrocarbon oil to a predetermined value, to provide a dried spent adsorbent material;
• e. grinding the dried spent adsorbent material containing HPNA compounds and HPNA precursors to produce a free-flowing mass of ground adsorbent particles;
• f. introducing the free-flowing mass of ground adsorbent particles into a fluid feedstream to form a moving mixed feedstream;
• g. introducing the moving mixed fluid feedstream containing the ground adsorbent particles into a membrane wall partial oxidation gasification reactor;
• h. introducing a feedstream comprising a hydrocarbon oil fuel, steam, a predetermined volume of an oxygen-containing gas, and optionally, an ash-forming material into the reactor for combustion to produce a mixture of hot gases containing carbon monoxide and hydrogen, and molten mineral slag;
• i. recovering the mixture of hot carbon monoxide and hydrogen gases from the reactor to provide a synthesis gas.