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High pressure, high flow rate batch mixing apparatus for high throughput experiments.

Anandvinod Dalmiya1, Jai M Mehta1, Robert S Tranter2

  • 1Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA.

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A new automated batch mixing apparatus ensures rapid, stable gas and vapor mixtures for experiments. This system is accurate, repeatable, and suitable for demanding applications like shock tubes.

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Area of Science:

  • Chemical Engineering
  • Materials Science
  • Analytical Chemistry

Background:

  • Accurate gas and vapor mixture preparation is critical for various scientific experiments.
  • Existing methods may lack the automation, stability, or flow rate required for demanding applications.
  • Intermittent flow demands in devices like shock tubes necessitate specialized mixing solutions.

Purpose of the Study:

  • To design and construct an automated, high-pressure, high-flow-rate batch mixing apparatus.
  • To ensure rapid, stable, and repeatable mixing of multiple gases and vapors.
  • To validate the apparatus's performance for diverse experimental needs.

Main Methods:

  • Development of an automated intermittent batch mixing system with an accumulator tank.
  • Implementation of heating capabilities for low-volatility vapors.
  • Verification of accuracy and repeatability using gas chromatography analysis.
  • Testing with multi-component mixtures of varying complexity and volatility.

Main Results:

  • The apparatus successfully prepared stable, repeatable, and accurate multi-component gas and vapor mixtures.
  • It demonstrated suitability for both intermittent and steady-state operation.
  • Performance was validated across a range of mixture complexities and volatilities.
  • Challenges in preparing liquid-based mixtures were identified, with potential solutions discussed.

Conclusions:

  • The developed automated batch mixer is a reliable tool for generating precise gas and vapor mixtures.
  • Its design is advantageous for experiments with intermittent flow demands and in specialized locations like synchrotron light sources.
  • Further development may be needed to optimize the preparation of complex liquid-based mixtures.