Catalytic Reaction Sampling with High-Pressure Liquid Separation
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Solution Overview
Problem
Existing apparatuses for analyzing heterogeneously catalyzed reactions, particularly catalytic cracking processes, face challenges in sampling at comparable times, analyzing reaction parameters over time, and handling condensable or liquid components at pressures above 1 bar, making it difficult to perform serial studies and continuous analysis.
Innovation Solution
An apparatus with a reactor system that includes a metallic tube liquid separator and deflection body for separating particulate catalysts from reaction products, allowing for precise sampling at defined times, handling high pressures, and separating liquid components effectively, combined with a catalyst reservoir for uniform catalyst supply and temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed bed catalyst or conventional fluidized bed reactor is used, then the apparatus can perform catalytic reactions, but it cannot achieve precise sampling at defined times and continuous monitoring of reaction parameters
Solution Approach 1:
The apparatus is divided into distinct functional modules: a reaction section with reactor and catalyst reservoir, a separation section with cyclone separator, and an analysis section with liquid separator and sampling points. This segmentation allows each module to perform its specific function optimally while enabling precise sampling at defined times without requiring the entire apparatus to be redesigned for monitoring purposes
Solution Approach 2:
A deflection body is introduced as an intermediary element in the liquid separator to improve the separation of liquid condensate from gaseous reaction products. This intermediary component enables effective liquid-gas separation at pressures above 1 bar, facilitating continuous monitoring without compromising the sampling precision or requiring complex additional equipment
2Stress or pressure
If liquid separators are used at pressures above 1 bar, then high pressure reactions can be analyzed, but conventional liquid separators cannot handle such pressures
Solution Approach 1:
The liquid separator is specifically designed to operate at pressures above 1 bar by modifying its structural parameters and materials. The separator maintains reliability at high pressures through engineered design features that accommodate pressure stress while preserving its separation function, enabling continuous analysis of high-pressure catalytic reactions
3Measurement precision
If pilot plants with large catalyst volumes are used, then industrial scale processes can be simulated, but the plants become more costly and complex to operate
Solution Approach 1:
The apparatus combines multiple functions in a compact design: the reactor serves both as reaction chamber and flow control device, the cyclone separator simultaneously separates catalyst particles from reaction products and enables catalyst recycling, and the liquid separator handles both phase separation and sampling. This multi-functionality allows accurate simulation of industrial processes with minimal catalyst volumes (1-50 g), reducing complexity and cost while maintaining representation accuracy
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
Enables precise, automated sampling and analysis of heterogeneously catalyzed reactions at high pressures, facilitating serial studies and continuous monitoring, while maintaining accuracy and efficiency in separating liquid and gaseous components.
Implementation Method 1
arranged downstream of the separation apparatus is a liquid separator for separating liquid constituents from the reaction product, wherein the liquid separator comprises a metallic tube and a deflection body
Implementation Method 2
liquid separator for separating liquid constituents from the reaction product
Implementation Method 3
arranged downstream of each reactor is a separation apparatus for separating the particulate catalyst from a reaction product
Data Source
AI summary
The invention relates to an apparatus for analyzing heterogeneously catalyzed reactions comprising at least one reactor (3) through which a particulate catalyst flows and at least one reactant feed, wherein arranged downstream of each reactor (3) is a separation apparatus (17) for separating the particulate catalyst from a reaction product comprising condensable gases and arranged downstream of the separation apparatus (17) is a liquid separator (31) for separating liquid constituents from the reaction product, wherein the liquid separator (31) comprises a metallic tube (103) and a deflection body (119), wherein the metallic tube (103) is closed at its ends and the deflection body (119) is accommodated in the metallic tube (103) and the metallic tube (103) comprises a side feed (135) at a first end (105) and a gas outlet (113) at a second end (107) and the gas outlet (113) is connected to at least one sample vessel (37). The invention further relates to a process for analyzing heterogeneously catalyzed reactions in the apparatus.