On-line recovery system coupled to a Rock-Eval® device: An analytical methodology for characterization of liquid and solid samples

摘要: Abstract The Rock-Eval® device has been widely used to identify the type and thermal maturity of sedimentary organic matter, as well for quantifying total carbon content. Traditionally, it is a screening tool estimate petroleum generation potential source rocks using standardized parameters. More recently, new method (Shale Play™) was proposed investigation hydrocarbon content liquid-rich tight rock samples. In this study, we describe dual vacuum on-line system that developed recover most compounds are thermally released during Shale Play™ analysis. Thermally vaporized products divided so half analyzed by flame ionization detector (FID) while other portion cryogenically trapped in recovery system. can then be transferred via line into sample vial subsequent molecular and/or isotopic composition analyses. volumes were calibrated known quantities gas (CH4 CO2). Sample transfer without fractionation demonstrated CO2 evolved from preparation pure carbonate standards (siderite, magnesite azurite). Recovery efficiencies first measured on C8-C16 n-alkane produced oil Results indicate high quantitative an accurate mass balance Sh0 thermovaporization step (100–200 °C). at higher temperatures Sh1 (200–350 °C) recovered lower efficiencies, but still suitable characterization. coupled could have applications beyond geochemistry.