Reactive Distillation Microchannel Reactor Gas-Liquid Separation
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Solution Overview
Problem
Existing methods for performing reactive distillation, especially those using micro channel reactors, face challenges in efficiently handling reactions that produce gas components due to difficulties in controlling gas and liquid layers, equipment design, and scalability for industrial applications.
Innovation Solution
A method involving the supply of a liquid containing a raw material compound and a low-boiling compound to a flow channel, where the low-boiling compound forms a gas phase, allowing the gas component produced by the reaction to be extracted and discharged, facilitating efficient separation of the liquid and gas phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reactive distillation is performed in a continuous multistage distillation column, then the gas component is constantly extracted from the liquid phase to shift equilibrium to the product side, but the temperature decreases from bottom to top of the column causing the reaction rate to decrease
Solution Approach 1:
The invention changes the temperature parameter distribution in the distillation column by introducing a reboiler at the top stage. This creates a temperature gradient that increases from bottom to top, opposite to conventional columns. The reboiler heating provides thermal energy to vaporize the low-boiling component and maintain high reaction temperature throughout the column, thereby increasing the reaction rate while still achieving equilibrium shift through continuous gas extraction.
2Productivity
If a micro channel reactor is used to increase reaction efficiency and control heat transfer, then heating and cooling can be performed quickly, but gas components produced by reaction cannot be effectively removed as bubbles are retained in the flow channel
Solution Approach 1:
The invention merges the micro channel reactor with a distillation column structure. The micro channel reactor is positioned within the distillation column, combining the high heat transfer efficiency and reaction control of micro channels with the gas extraction capability of distillation. The continuous vaporization and gas extraction in the distillation column effectively removes gas components produced by the reaction, preventing bubble retention and equilibrium limitation.
Solution Approach 2:
The distillation column acts as an intermediary system between the micro channel reactor and the gas phase. It provides a mechanism for continuous gas extraction through vaporization, mediating the removal of gas components produced in the micro channel reactor. The reboiler serves as a thermal intermediary, providing the necessary heat for vaporization and gas extraction.
3Productivity
If the temperature in the distillation column is increased to improve reaction rate, then the reaction efficiency increases, but the separation efficiency of distillation may be compromised
Solution Approach 1:
The invention changes the temperature parameter distribution by introducing a reboiler at the top stage, creating a temperature gradient that increases from bottom to top. This allows high temperature conditions throughout the column to maintain high reaction rates, while the continuous vaporization and condensation processes in the distillation column still achieve effective separation of components based on their volatility differences.
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 approach enables efficient collection of reaction products with simple equipment, improving reaction efficiency and scalability for industrial use by stabilizing gas-liquid equilibrium and simplifying the control of phases in the flow channel.
Implementation Method 1
supplying a liquid containing at least one raw material compound and a low-boiling compound having a standard boiling point lower than a standard boiling point of the raw material compound to a flow channel, heating the liquid to produce a liquid reaction product and a gas component by a reaction of the raw material compound
Implementation Method 2
separating a liquid phase containing the reaction product from a gas phase containing the gas component and the low-boiling compound
Data Source
AI summary
The present invention relates to a reaction method comprising a step of supplying a liquid containing at least one raw material compound and a low-boiling compound having a standard boiling point lower than a standard boiling point of the raw material compound to a flow channel, a step of heating the liquid to produce a liquid reaction product and a gas component by a reaction of the raw material compound, and a step of separating a liquid phase containing the reaction product from a gas phase containing the gas component and the low-boiling compound.