Gas Chromatograph Injector as Catalytic Reactor
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Solution Overview
Problem
Existing devices for evaluating heterogeneous catalysts are sophisticated, bulky, and expensive, limiting their accessibility and efficiency in high-throughput catalytic screening.
Innovation Solution
A compact and economical device utilizing the injectors of a gas phase chromatograph as fixed bed catalytic reactors, allowing multiple parallel reactions with independently adjustable temperature, pressure, and flow rates, enabling high-throughput catalytic screening while maintaining reversibility for chromatographic use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional laboratory reactors are used for catalytic performance measurements, then measurement accuracy is maintained, but device complexity and cost increase significantly
Solution Approach 1:
The gas chromatograph injector is designed to serve dual functions: its original chromatographic sample injection function and a new function as a fixed-bed catalytic reactor. The injector's heating zone and containment structure are utilized to perform catalytic reactions, eliminating the need for separate dedicated reactor equipment while maintaining measurement capabilities.
2Measurement precision
If multiple catalysts are evaluated sequentially using conventional reactors, then measurement accuracy is preserved, but evaluation time increases
Solution Approach 1:
The system divides the catalyst evaluation process into multiple parallel segments by utilizing multiple gas chromatograph injectors. Each injector can independently house a different catalyst and perform simultaneous catalytic reactions, allowing parallel evaluation of multiple catalysts rather than sequential testing, thereby significantly increasing throughput while maintaining measurement accuracy through the chromatograph's analytical capabilities.
3Productivity
If dedicated catalytic screening equipment is purchased, then high-throughput screening capability is achieved, but equipment cost increases
Solution Approach 1:
The invention repurposes existing gas chromatograph equipment, specifically the injector component, to perform catalytic screening functions. This multi-functional approach allows the same equipment to serve both its original chromatographic purpose and new catalytic reaction purposes, eliminating the need for purchasing dedicated expensive catalytic screening equipment while achieving high-throughput capability through parallel injector utilization.
4Reliability
If conventional reactors are used, then reaction conditions are precisely controlled, but device footprint increases
Solution Approach 1:
The catalytic reactor function is nested within the existing gas chromatograph injector structure. The injector's heating zone contains the catalytic bed, and the entire assembly is integrated into the chromatograph's existing thermal and flow control systems. This nesting approach maintains precise reaction condition control through the chromatograph's established control mechanisms while achieving a compact configuration that eliminates the need for separate external reactor equipment.
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 accelerates catalytic tests, reduces development time for new catalysts, and allows simultaneous evaluation of multiple catalysts or varying conditions, providing efficient and cost-effective performance measurements.
Implementation Method 1
The device according to the invention further comprises a gas chromatograph and each reaction zone is located in an injector of the chromatograph
Implementation Method 2
a detection system conventionally used in gas chromatographs, for example a flame ionization detector (FID in English), a catharometer (TCD in English) or any other detector known to those skilled in the art
Data Source
Figure 1~3
AI summary
The invention relates to a device (1) for evaluation of at least one performance criterion of heterogeneous catalysts, comprising; at least one reactant source (2), at least one reaction zone equipped with at least one catalyst and connected to at least one reactant source (2) in such a way as to produce, in each reaction zone, a heterogeneous catalytic reaction between each catalyst present in the reaction zone and the reactant or reactants coming from each reactant source (2) connected to the reaction zone, and means for evaluation of at least one performance criterion of heterogeneous catalysts, characterized in that the device (1) further comprises a gas chromatograph and in that each reaction zone (9) is situated in an injector (8) of the gas chromatograph.