CLC-CDR Integration System for CO2 Reduction and Energy Recovery
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Solution Overview
Problem
Conventional chemical looping combustion and reverse water gas shift technologies face challenges in efficiently separating CO2 and H2, requiring high-priced hydrogen and additional energy supply, leading to increased costs and CO2 emissions.
Innovation Solution
A chemical looping combustion and carbon dioxide direct reduction (CLC-CDR) integration system that uses methane as a reducing agent, inherently separates high concentrations of CO2, and controls the ratio of CO and CO2 through a bypass line and heat exchanger, utilizing the exothermic reaction from the air reactor to supply energy to the endothermic CO2 reduction reactor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional reverse water gas shift technology is used for CO2 conversion, then CO can be produced, but high-priced hydrogen is required and additional energy supply is needed, increasing costs
Solution Approach 1:
The patent combines chemical looping combustion (CLC) and carbon dioxide direct reduction (CDR) into an integrated system where the two processes share common infrastructure (reactors, oxygen carrier circulation system) and energy sources. The exothermic oxidation reaction in the air reactor provides thermal energy for the endothermic CO2 reduction reaction, eliminating the need for external energy supply required in conventional separate processes.
Solution Approach 2:
The system uses its own internal resources to sustain operation. The oxygen carrier particles circulate between reactors, transferring oxygen from the air reactor to the CO2 reduction reactor. The heat generated from oxidation reactions automatically provides the energy needed for reduction reactions, creating a self-sustaining thermal cycle without external energy input.
2Quantity of substance
If conventional CO2 separation methods are used, then CO2 can be separated, but additional CO2 capture processes and storage facilities are required, increasing device complexity
Solution Approach 1:
The patent extracts CO2 directly from the fuel reactor outlet where it is produced in high concentration through the chemical looping combustion process. This extracted CO2 is then fed directly into the carbon dioxide reduction reactor, eliminating the need for complex additional capture and storage facilities that would be required in conventional separate processes.
3Quantity of substance
If methane is used as reducing agent instead of hydrogen, then cost is reduced, but control of CO and CO2 ratio becomes more challenging
Solution Approach 1:
The system incorporates dynamic control mechanisms including bypass lines and mixing units that allow real-time adjustment of the CO and CO2 ratio in the product gas. The bypass line enables selective extraction of CO2 from the fuel reactor, while the mixing unit dynamically blends gases to achieve the desired composition based on downstream process requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system generates CO and steam economically, reduces energy costs, and inherently separates CO2 at low cost, eliminating the need for additional CO2 storage or conversion technologies while maintaining thermal efficiency.
Implementation Method 1
in one reactor (air reactor), an oxygen carrier particle absorbs oxygen included in air to form metal oxide
Implementation Method 2
The metal oxide is transported to another reactor (fuel reactor), reacting with a fuel to release oxygen and to be reduced into a metal form
Implementation Method 3
utilizing the exothermic reaction from the air reactor to supply energy to the endothermic CO2 reduction reactor
Data Source
AI summary
The present invention relates to a chemical looping combustion and carbon dioxide direct reduction (CLC-CDR) integration system and an operation method thereof, particularly to a chemical looping combustion and carbon dioxide direct reduction (CLC-CDR) integration system including: an air reactor, wherein an oxygen carrier particle is oxidized by reacting with injected air and air from which oxygen was partially removed is discharged; a fuel reactor, wherein the oxidized oxygen carrier particle is supplied, a supplied fuel is reacted to reduce the oxidized oxygen carrier particle, and carbon dioxide including H2O is discharged; and a carbon dioxide reduction reactor, wherein the reduced oxygen carrier particle is supplied, supplied carbon dioxide is reacted to discharge carbon monoxide, and the reduced oxygen carrier particle is partially oxidized and supplied to the air reactor.