Complete carbon analysis of sulfur-containing mixtures using postcolumn reaction and flame ionization detection

Connor A. Beach, Kristeen E. Joseph, Paul J. Dauenhauer, Charles S. Spanjers, Andrew J. Jones, Triantafillos J. Mountziaris

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Quantitative analysis of complex mixtures containing hundreds-to-thousands of organic compounds rich in heteroatoms, including oxygen, sulfur, and nitrogen, is a major challenge in the fuel, food, and chemical industries. In this work, a two-stage (oxidation and methanation) catalytic process in a 3-D–printed metal microreactor was evaluated for its capability to convert sulfur-containing organic compounds to methane. The microreactor was inserted into a gas chromatograph between the capillary column and flame ionization detector. Catalytic conversion of all sulfur-containing analytes to methane enabled carbon quantification without calibration, by the method identified as “quantitative carbon detection” or QCD. Quantification of tetrahydrothiophene, dimethyl sulfoxide, diethyl sulfide, and thiophene indicated complete conversion to methane at 450°C. Long-term performance of a commercial microreactor was evaluated for 2000 consecutive injections of sulfur-containing organic analytes. The sulfur processing capacity of the microreactor was identified experimentally, after which reduced conversion to methane was observed.

Original languageEnglish (US)
Pages (from-to)5438-5444
Number of pages7
JournalAIChE Journal
Volume63
Issue number12
DOIs
StatePublished - Dec 2017

Bibliographical note

Funding Information:
This work was supported by the Catalysis Center for Energy Innovation, a U.S. Department of Energy – Energy Frontier Research Center under award DE-SC0001004.

Funding Information:
This work was supported by the Catalysis Center for Energy Innovation, a U.S. Department of Energy ? Energy Frontier Research Center under award DE-SC0001004.

Publisher Copyright:
© 2017 American Institute of Chemical Engineers

Keywords

  • chromatography
  • methanation
  • microreactor
  • oxidation
  • quantitative analysis
  • sulfur

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