PREPARATION OF HIGH-CONCENTRATION HYDROGEN GAS WITH THERMAL CRACKING OF HEAVY OIL

摘要

PURPOSE:To obtain a light oil and a high-concentration hydrogen gas efficiently by the thermal cracking of a heavy oil in a thermal cracking furnace with a fluidized bed of iron ore powders while bringing the iron ore to which by-product carbon is sticked into contact with steam and oxygen in a gasifier. CONSTITUTION:A heavy oil is introduced into two-column thermal cracking furnace 1 and 2 with a fluidized bed to iron ore powders having an average diameter of 10mum-2mm. to undergo thermal cracking and the obtained light oil is collected from the top of the tower. The by-product carbon from thermal cracking is allowed to deposit on the surface of the iron ore, which is introduced into a fluidized bed gasifier 3 having a fluidized gas superficial velocity of 20-200cm/ sec, and is brought into contact with an oxidizing gas containing an excess of steam and 15vol% or less oxygen at 800-1,000 deg.C and 0-10kg/cm2G to effect reactions shown by formulas I and II, generating hydrogen, thus giving a high- concentration hydrogen gas.