Electrified Reactor Heat Exchange for Endothermic Temperature Control
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Solution Overview
Problem
Traditional catalytic reactor systems suffer from poor heat utilization and high CO2 emissions due to external combustion, leading to inefficient heat transfer and high energy consumption.
Innovation Solution
An electrified reactor system with integrated heat recovery and multiple temperature zones, utilizing electric heating and heat exchange configurations to recover heat efficiently and control temperature gradients, incorporating regenerative heat exchangers and ceramic heat storage materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If external combustion is used to heat the reactor, then the heat generation mechanism is decoupled from the catalytic surface, but heat transfer efficiency is poor (50% or less) and large amounts of CO2 are generated
Solution Approach 1:
The patent merges the heat generation function with the reactor system by integrating a heat exchanger directly into the reactor structure. The heat exchanger shares the reactor wall or is positioned within the reactor, allowing direct thermal coupling between the heat source and the reaction zone, thereby eliminating the inefficiencies of external combustion and heat transfer through reactor walls.
Solution Approach 2:
The patent introduces a heat exchanger as an intermediary component that facilitates efficient heat transfer from the combustion chamber to the reaction zone. This heat exchanger acts as a thermal mediator, allowing heat to be transferred through controlled conduction and convection paths, significantly improving heat transfer efficiency compared to direct external heating.
2Ease of operation
If external combustion is used to heat the reactor, then the heat generation mechanism is decoupled from the catalytic surface, but large amounts of CO2 are generated from the combustion process
Solution Approach 1:
The patent converts the harmful CO2 emissions from combustion into a useful resource by routing the combustion flue gas through the heat exchanger. The hot flue gas serves as both the heat source and a potential reactant stream, allowing the combustion process to be integrated with the chemical reaction process. This approach transforms waste heat and CO2 emissions into valuable thermal energy and potential feedstock.
3Loss of energy
If traditional heat exchange configurations are used, then heat recovery is limited, but energy efficiency remains low
Solution Approach 1:
The patent segments the reactor system into distinct functional zones: a combustion chamber for heat generation, a heat exchanger zone for heat transfer and heat recovery, and a reaction zone for chemical transformations. This segmentation allows each zone to be optimized for its specific function and enables multiple heat exchange streams to operate simultaneously, maximizing overall heat recovery efficiency.
Solution Approach 2:
The heat exchanger in the patent serves multiple functions simultaneously: it transfers heat from the combustion chamber to the reaction zone, recovers heat from the flue gas stream, preheats incoming reactants, and potentially serves as a reaction vessel itself. This multi-functionality maximizes energy utilization and minimizes waste heat losses.
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
The system achieves high energy efficiency (>80%) and reduces CO2 emissions by leveraging renewable energy sources, enabling high-temperature endothermic reactions with flexible operation and cost-effective heat recovery.
Implementation Method 1
The heat exchange system (101) may be recuperative or regenerative using any suitable heat exchanger configuration
Implementation Method 2
The heat of combustion is transferred into the process stream through the reactor wall by radiative and conductive heat transfer mechanisms
Implementation Method 3
a first electrically-heated catalytic element in contact with the first reaction volume
Implementation Method 4
incorporating regenerative heat exchangers and ceramic heat storage materials
Implementation Method 5
enabling high-temperature endothermic reactions with flexible operation
Data Source
AI summary
An electrified reactor system can include optional insulation, an optional pressure housing, electrical connections to/from the catalytic module, a preheater, one or more heat exchangers, a reaction zone (e.g., a reaction module, a catalyst module, etc.), one or more optional preheaters, and an operation switcher (e.g., valve, rotatory switch, controller, etc.).