Cited by 274Catalysts for Methane ReformingThermochemical Biomass Conversion ProcessesSubcritical and Supercritical Water Processes

The DOI matches its Crossref record; 44 of the 45 references it cites were found in a registry or an index.

Lipid Formation by Aqueous Fischer-Tropsch-Type Synthesis over a Temperature Range of 100 to 400 °C

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Rushdi, Ahmed I., Simoneit, Bernd R. T.·2001·Origins of life and evolution of the biosphere

Abstract

The formation of lipid compounds during an aqueous Fischer-Tropsch-type reaction was studied with solutions of oxalic acid as the carbon and hydrogen source. The reactions were conducted in stainless steel vessels by heating the oxalic acid solution at discrete temperatures from 100 to 400 degrees C, at intervals of 50 degrees C for two days each. The maximum lipid yield, especially for oxygenated compounds, is in the window of 150-250 degrees C. At a temperature of 100 degrees C only a trace amount of lipids was detected. At temperatures above 150 degrees C the lipid components ranged from C12 to > C33 and included n-alkanols, n-alkanoic acids, n-alkyl formates, n-alkanals, n-alkanones, n-alkanes, and n-alkenes, all with essentially no carbon number preference. The n-alkanes increased in concentration over the oxygenated compounds at temperatures of 200 degrees C and above, with a slight reduction in their carbon number ranges due to cracking. It was also noted that the n-alkanoic acids increased while n-alkanols decreased with increasing temperature above 200 degrees C. At temperatures above 300 degrees C synthesis competes with cracking and reforming reactions. At 400 degrees C significant cracking was observed and polynuclear aromatic hydrocarbons and their alkylated homologs were detected. The results of this work suggest that the formation of lipid compounds by aqueous FTT reactions proceeds by insertion of a CO group at the terminal end of a carboxylic acid functionality to form n-oxoalkanoic acids, followed by reduction to n-alkanoic acids, to n-alkanals, then to n-alkanols. The n-alkenes are intermediate homologs for n-alkan-2-ones and n-alkanes. This proposed mechanism for aqueous FTT synthesis differs from the surface-catalyzed stepwise FT process (i.e., gaseous) of polymerization of methylene reported in the literature.

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  1. Fischer, F.: 1935, Die Synthese der Treibstoffe (Kogasin) und Schmieröle aus Kohlenoxyd und Wasserstoff bei gewöhnlichem Druck, Brennstoff-Chemie 16, 1–11.
  2. Markhinin, E. K.: 1980, Volcanoes and life, Problems in Biovolcanology, Mycil, Moscow, 196 pp.
  3. Palmer, D. A., Weselowski, D. J. and Bell, J. L. S.: 1993, EMF Measurements of Oxalic and Formic Acid Decomposition Kinetics and Interaction of Acetate with Aluminum (III) to High Temperatures, EOS 74(16), 327–328.

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Metadata

Authors
Rushdi, A. I., & Simoneit, B. R. T.
Affiliations
Oregon State University (US)
Venue
Origins of life and evolution of the biosphere
Published
2001-02
Volume
31
Issue
1-2
Pages
103-118
ISSN
  • 0169-6149 (ISSN-L)
  • 1573-0875
OpenAlex
W422539398
Cited by
274
References
45
Citations by year
2026: 11 · 2025: 10 · 2024: 5 · 2023: 12 · 2022: 16 · 2021: 12 · 2020: 11 · 2019: 11 · 2018: 14 · 2017: 16 · 2016: 6 · 2015: 7 · 2014: 11 · 2013: 6 · 2012: 14
FWCI
9.58
Type
journal article
Language
en
Open access
Locations
  • Origins of Life and Evolution of Biospheres (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Aeronautics and Space Administration
Topics
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
  • Physical Sciences › Energy › Fuel Technology › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Subcritical and Supercritical Water Processes
Keywords
oxalic acid, n-alkanoic acids, n-alkanols, n-alkanes, reaction temperature dependence, polycyclic aromatic hydrocarbons, prebiotic chemistry, origin of life
MeSH terms
Origin of Life, Alkanes, Hot Temperature, Lipids, Water, Evolution, Chemical, Oxalic Acid

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