초록 ▼

A process for simultaneously cracking a heavy hydrocarbons to form light oil and producing hydrogen is described, which comprises (1) a first step wherein steam and heavy hydrocarbons are simultaneously contacted with a catalyst in a reduced state, containing iron in the form of iron oxide, to produ

A process for simultaneously cracking a heavy hydrocarbons to form light oil and producing hydrogen is described, which comprises (1) a first step wherein steam and heavy hydrocarbons are simultaneously contacted with a catalyst in a reduced state, containing iron in the form of iron oxide, to produce hydrogen, cracked gases and cracked light oils, to convert the reduced-state catalyst into an oxidized-state catalyst, and to deposit coke on the catalyst, (2) a second step wherein the oxidized-state catalyst with coke deposited thereon is contacted with an oxygen-containing gas to partially combust the coke on the catalyst, to convert the oxidized-state catalyst into a reduced-state catalyst, and to fix a sulfur compound contained in the coke as iron sulfide with a part of the reduced-state catalyst; and (3) a third step wherein catalyst obtained from the second step, the major portion of the catalyst being recycled between the first step and second step, is contacted with an oxygen-containing gas at a temperature of from 600°to 1,000°C. to effect roasting and gasification of iron sulfide in the catalyst.

대표청구항 ▼

A process for simultaneously cracking heavy hydrocarbons to form light oils and producing hydrogen, which comprises a first step wherein steam and heavy hydrocarbons are simultaneously contacted with a catalyst in a reduced state, containing at least 30% by weight iron in the form of iron oxide, at

A process for simultaneously cracking heavy hydrocarbons to form light oils and producing hydrogen, which comprises a first step wherein steam and heavy hydrocarbons are simultaneously contacted with a catalyst in a reduced state, containing at least 30% by weight iron in the form of iron oxide, at a temperature of from 500°to 800°C., to produce hydrogen, cracked gases, and cracked light oils, to convert the reduced-state catalyst into an oxidized-state catalyst, and to deposit coke on the catalyst, and a second step wherein the oxidized-state catalyst with the coke deposited thereon is contacted with an oxygen-containing gas insufficient for achieving complete combustion of the coke, at a temperature of from 750°to 950°C., to partially combust the coke on the catalyst, to convert the oxidized-state catalyst into a reduced-state catalyst, and to fix a sulfur compound contained in the coke as iron sulfide with a part of the reduced-state catalyst, wherein the improvement comprises that: (1) a major portion of the catalyst is recycled between the first step and second step; and (2) there is provided a third step wherein a part of the reduced-state, iron sulfide-containing catalyst formed in the second step is contacted with an oxygen-containing gas in a reducing atmosphere at a temperature of from 600°to 1,000°C. to effect combustion of iron sulfide in the catalyst, the catalyst after combustion being recycled to the second step or the first step, or to both the second and first steps.