In high-throughput experiments and parallel synthesis, the temperature and pressure uniformity of the reactor array directly determines the reliability and comparability of experimental data. If there is a significant temperature or pressure difference between each reaction unit, it will lead to deviations in reaction rate, selectivity, and even product structure, seriously affecting key research conclusions such as catalyst screening and process optimization. Therefore, achieving high-precision temperature/pressure uniformity control isReactor arrayCore technical challenges in design.
In terms of temperature control, key technologies include:
1. Efficient thermal conductivity structure design: High thermal conductivity metals (such as aluminum alloy or copper alloy) are used as the reactor substrate, and precision machining is used to ensure that the contact area between each reaction hole and the heating/cooling source is consistent;
2. Partition independent temperature control system: The reactor array is equipped with multi zone PID temperature control modules, combined with infrared or embedded thermocouples for real-time feedback, dynamically compensating for edge effects and local heat losses;
3. Forced convection or liquid bath circulation: For high or low temperature reactions, introducing constant temperature oil bath circulation or built-in fan forced convection significantly improves the uniformity of the temperature field inside the chamber, and the typical temperature difference can be controlled within ± 0.5 ℃.
In terms of pressure uniformity control, it mainly relies on:
1. Design of shared gas path and balance chamber: All reaction units are connected to the same intake/exhaust pipeline through a pressure equalization chamber to avoid uneven pressure drop caused by differences in pipeline length;
2. Closed loop control of back pressure regulating valve and pressure sensor: a high response back pressure valve is integrated at the outlet end, combined with a high-precision pressure sensor (with a resolution of up to 0.01 bar), to achieve synchronized and stable pressure across the entire array;
3. Sealing Consistency Guarantee: Standardized quick installation sealing structure (such as O-ring+spring loading) is adopted to ensure consistent sealing performance of each reaction position under high pressure, preventing pressure imbalance caused by leakage.
In addition, multi physics coupled simulation (such as COMSOL) is widely used in the design phase to predict temperature/pressure distribution and guide structural optimization. In situ monitoring technologies, such as fiber optic temperature measurement and miniature pressure probes, provide data support for uniformity verification in actual operation.
In summary, through the collaborative innovation of materials, structures, control algorithms, and sensing technology, modernReactor arrayA highly uniform temperature and pressure environment has been achieved, providing a solid foundation for high-throughput and highly reliable chemical and material research.