Photochemical Reactor with Translucent Separator for Temperature Control
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Solution Overview
Problem
Photochemical reactors face challenges in scaling up reactions due to uneven light exposure and temperature control issues, leading to reduced reaction efficiency and product quality, as existing cooling systems fail to independently control reactor temperature and often result in heat transfer that promotes unwanted side-reactions.
Innovation Solution
A photochemical reactor design that isolates the light source and reactor chamber, allowing for separate cooling and temperature control, using a translucent separator to maximize UV radiation exposure and minimize heat transfer, with a reflective casing to direct UV radiation back into the reaction area and a heat sink to dissipate infrared radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a broad spectrum UV light source is used to maximize photochemical reaction output, then reaction efficiency is improved, but heat generation increases causing unwanted side-reactions and temperature control issues
Solution Approach 1:
The reactor is divided into separate zones: a lamp chamber for light generation and a reaction chamber for chemical reactions. This spatial segmentation allows the light source to be positioned close to the reaction zone without direct thermal contact, enabling high UV intensity while maintaining temperature control through separate cooling systems for each zone.
Solution Approach 2:
A translucent separator (quartz glass) is introduced as an intermediary between the light source and reaction chamber. This separator transmits UV radiation effectively while providing thermal isolation, allowing the reaction mixture to be cooled independently from the light source, thus resolving the contradiction between maximizing light exposure and controlling temperature.
2Productivity
If the light source is positioned close to the reactor to maximize UV radiation intensity, then photonic efficiency is improved, but heat transfer to the reactor increases causing side-reactions
Solution Approach 1:
The translucent separator acts as a thermal barrier that allows UV photons to pass through while blocking heat transfer from the light source to the reaction chamber. This enables the light source to be positioned close to the reactor for maximum photonic efficiency without suffering from the harmful thermal effects.
Solution Approach 2:
Different regions of the reactor are given different thermal properties: the lamp chamber allows heat generation, while the reaction chamber is designed for heat dissipation through cooling channels. The translucent separator creates a local thermal boundary that protects the reaction zone from the light source's heat while maintaining UV transmission.
3Temperature
If cooling systems are used to control reactor temperature, then temperature control is improved, but UV radiation intensity is reduced due to heat absorption by cooling media
Solution Approach 1:
The translucent separator serves as a selective intermediary that transmits UV radiation while blocking infrared heat. This allows the cooling system to remove heat from the reaction chamber without interfering with the UV light path, thereby maintaining both temperature control and UV radiation intensity simultaneously.
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 design enables precise temperature control of the reactor chamber, maximizing UV radiation intensity and reducing unwanted side-reactions, resulting in improved reaction efficiency and product yield while maintaining a compact and efficient reactor system.
Implementation Method 1
a first translucent separator arranged to form an airtight separation between the lamp chamber and the reactor chamber
Implementation Method 2
a reflective casing to direct UV radiation back into the reaction area
Implementation Method 3
a heat sink to dissipate infrared radiation
Implementation Method 4
a heat sink to dissipate infrared radiation
Implementation Method 5
Gas which enters the photochemical reactor via this first gas inlet enters a cylindrical cavity situated in the centre of the baseplate beneath the lamp chamber
Data Source
Figure 1~2
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AI summary
A device for carrying out a temperature-controlled photochemical reaction is provided, the device including: a lamp chamber capable of receiving a light source and having a first gas inlet and a first gas outlet for respectively feeding gas into and out of the lamp chamber; a reactor chamber having a second gas inlet and a second gas outlet for respectively feeding gas into and out of the reactor chamber, and a reactor unit, the reactor unit including a reactor in the form of a translucent tube; a translucent first separator separating the lamp chamber and the reactor chamber in an airtight manner; wherein the reactor chamber surrounds the lamp chamber. The device can provide accurate temperature control of photochemical flow reactions by having separate cooling systems for the lamp and reactor. Further aspects of the invention provide a kit including a device, a reactor and a lamp, and a method of carrying out a temperature-controlled photochemical flow reactions.