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The reactor operates by repeatedly imposing small AC modulations of reactant gas pressure on top of a much larger DC pressure background. Based on the rate of pressure relaxation following each AC pulse, the reaction rate is determined. Our design\u00a0is characterized by modular construction from off-the-shelf, ultra-high-vacuum-compatible components, which facilitate easy retrofitting and adaptation to a range of experimental conditions. Automated experiment control and data acquisition is accomplished via a custom National Instruments\u00a9 LabView virtual instrument. Data analysis is automated using a custom series of Mathworks\u00a9 Matlab scripts. We demonstrate reactor performance through measurements of hydrogenation kinetics for a composite H2 getter material consisting of 1,4-bis(phenylethynyl)benzene mixed with a palladium\/carbon catalyst.<\/jats:p>","DOI":"10.1063\/5.0058181","type":"journal-article","created":{"date-parts":[[2021,9,3]],"date-time":"2021-09-03T14:52:23Z","timestamp":1630680743000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":1,"title":["Versatile semi-batch apparatus for manometric measurement of gas\u2013solid reaction rates"],"prefix":"10.1063","volume":"92","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4633-4113","authenticated-orcid":false,"given":"Michael G.","family":"Heidlage","sequence":"first","affiliation":[{"name":"Sigma Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. J.","family":"Aloi","sequence":"additional","affiliation":[{"name":"Sigma Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8648-9377","authenticated-orcid":false,"given":"D. J.","family":"Safarik","sequence":"additional","affiliation":[{"name":"Sigma Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2021,9,3]]},"reference":[{"issue":"1\u20132","key":"2023080705083524700_c1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1016\/j.tca.2011.03.034","volume":"520","year":"2011","journal-title":"Thermochim. 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