Integrated heavy liquid fuel coking with chemical looping concept
AssigneeSaudi Arabian Oil Company
InventorsAli Hoteit, Mourad Younes, Aqil Jamal
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Abstract
A process for power generation using a chemical looping combustion concept is integrated with heavy liquid fuel coking in a cracking reactor, and is configured such that petcoke deposits on metal oxide particles from the cracking reactor are used as fuel in the chemical looping combustion reaction. The process is also configured such that metal oxide particles provide the heat necessary for the cracking reaction to be initiated in the cracking reactor.
Claims24
A method for chemical looping with integrated hydrocarbon cracking comprising the steps of:
- injecting at least one liquid hydrocarbon feed into a first reactor which operates under first reaction conditions to cause cracking of the at least one liquid hydrocarbon feed in the presence of an oxygen carrier to produce a first product stream and petcoke which deposits on the oxygen carrier;
- transferring the oxygen carrier with petcoke deposited thereon from the first reactor to a second reactor;
- operating the second reactor under second reaction conditions to produce a second product stream and to reduce the oxygen carrier that has petcoke deposited thereon, wherein the second reaction conditions comprise a gasification process in which the petcoke deposited on the oxygen carrier reacts with steam and CO2 that is injected into the second reactor to form a gas stream comprising syngas, whereby the oxygen carrier is reduced;
- transferring at least a first portion of the reduced oxygen carrier to the first reactor, wherein the reduced oxygen carrier provides heat and energy which allows the first reactor to operate under the first reaction conditions;
- transferring at least a second portion of the reduced oxygen carrier to a third reactor which operates under third reaction conditions to oxidize the reduced oxygen carrier;
- and
- transferring the oxidized oxygen carrier from the third reactor back to the second reactor.
A process for chemical looping combustion with integrated hydrocarbon cracking, comprising the steps of:
- injecting a heavy liquid fuel and metal oxides into a cracking reactor;
- cracking the heavy fuel in the cracking reactor in the presence of the metal oxides to produce petroleum-based products and petcoke deposits on the metal oxides;
- delivering the metal oxides with petcoke deposited thereon from the cracking reactor to a fuel reactor;
- gasifying the metal oxides with petcoke deposited thereon in the fuel reactor in the presence of steam to produce a product gas stream, unburned gases, and reduced metal oxides;
- delivering the product gas stream, unburned gases, and the reduced metal oxides from the fuel reactor to a riser;
- separating the reduced metal oxides from the unburned gases and the product gas stream in a separation section;
- delivering the separated reduced metal oxides to an air reactor;
- and
- oxidizing the reduced metal oxides in the air reactor to produce oxidized metal oxides and flue gas, wherein the oxidized metal oxides are delivered back to the fuel reactor.
Dependencies are inferred from the claim text.