STUDY ON INFLUENCE OF COKER HEAVY FRACTIONS ON HYDROGEN-TRANSFER ABILITY OF VACUUM RESIDUE DURING THERMAL REACTION

摘要

Hydrogen-transfer reaction,which is related to solid coke production,heavy products and light products,is an important reaction during thermal processing of petroleum residue[1-5].The ability of hydrogen-transfer of petroleum residue depends on its property and composition[4,5].So,the hydrogentransfer behavior changes with the composition of residue.Coker heavy fractions are unsuitable for being processed by catalytic cracking or hydro-cracking.This is because compared to VGO,their H/C atomic ratios are lower,their naphthenic ring to aromatic ring ratios in chemical structure are higher,and they contain more hetero-atoms like S and N[6].