Multichannel gas-uptake/evolution reactor for monitoring liquid-phase chemical reactions



Chase A. Salazar, Blaise J. Thompson, Spring M. M. Knapp, Steven R. Myers, Shannon S. Stahl


The design of a headspace pressure-monitoring reactor for measuring the uptake/evolution of gas in gas–liquid chemical transformations is described. The reactor features a parallel setup with ten-reactor cells, each featuring a low working volume of 0.2–2 ml, a pressure capacity from 0 to 150 PSIa, and a high sensitivity pressure transducer. The reactor cells are composed of commercially available disposable thick-walled glassware and compact monolithic weld assemblies. The software interface controls the reactor temperature while monitoring pressure in each of the parallel reactor cells. Reactions are easy to set up and yield high-density gas uptake/evolution data. This instrument is especially well suited to acquire quantitative time-course data for reactions with small quantities of gas consumed or produced.

Shop Contributions

The pressure-monitoring reactor was designed and constructed collaboratively by Steve Myers, Chase Salazar, and Blaise Thompson. Steve focused on the mechanical design and construction, including the unique welded stainless steel reaction cell assembly and the large, insulated aluminum heated block. Blaise focused on electronics and software, including choice of pressure transducers, choice of heating elements and temperature sensor, analog-to-digital converters, and an accessible graphical user interface for chemists.

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