Thermoanalytical Characterization and Catalytic Conversion of Deoiled Micro Algae and Jatropha Seed Cake

Zoltán Sebestyén, Eszter Barta-Rajnai, Z. Czégény, Thallada Bhaskar, Bhavya B. Krishna, Zoltán May, János Bozi, Zsolt Barta, Rawel Singh, E. Jakab

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The thermal decomposition of the byproducts of the biodiesel process was studied by thermoanalytical methods. Deoiled algae cake and jatropha seed deoiled cake were pyrolyzed and the catalytic effects of silica supported iron catalysts (Fe/FSM-16 and Fe/SBA-15) and magnetite (Fe3O4) were tested. The evolution profiles of the decomposition products as well as the thermal stability of the samples were determined by thermogravimetry/mass spectrometry (TG/MS). The formation of the volatile products was monitored by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The composition and the amounts of the gaseous products changed significantly in the presence of the silica supported iron catalysts: the yield of hydrogen and carbon monoxide considerably increased above the decomposition temperature of 400 °C. Both silica supported iron catalysts had important effects on the yield of the products originating from carbohydrates and lignins. The formation of anhydrosugars and phenolic compounds was hindered, while the evolution of aromatic and aliphatic hydrocarbons was enhanced. Fe/FSM-16 proved to be more efficient than Fe/SBA-15 and Fe3O4 catalysts. The thermal decomposition of the protein content of the samples resulted in the formation of 2,5-diketopiperazines and smaller molecules (e.g., ammonia). The silica supported iron catalysts had a special effect: their presence promoted the reaction of fatty acid esters and ammonia resulting in the formation of alkyl nitriles during the thermal decomposition.

Original languageEnglish
Pages (from-to)7982-7993
Number of pages12
JournalEnergy and Fuels
Volume30
Issue number10
DOIs
Publication statusPublished - Oct 20 2016

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Algae
Seed
Silicon Dioxide
Pyrolysis
Iron
Catalysts
Silica
Ammonia
Mass spectrometry
Diketopiperazines
Ferrosoferric Oxide
Decomposition
Special effects
Nitriles
Biofuels
Lignin
Magnetite
Carbon Monoxide
Carbohydrates
Hydrocarbons

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Thermoanalytical Characterization and Catalytic Conversion of Deoiled Micro Algae and Jatropha Seed Cake. / Sebestyén, Zoltán; Barta-Rajnai, Eszter; Czégény, Z.; Bhaskar, Thallada; Krishna, Bhavya B.; May, Zoltán; Bozi, János; Barta, Zsolt; Singh, Rawel; Jakab, E.

In: Energy and Fuels, Vol. 30, No. 10, 20.10.2016, p. 7982-7993.

Research output: Contribution to journalArticle

Sebestyén, Z, Barta-Rajnai, E, Czégény, Z, Bhaskar, T, Krishna, BB, May, Z, Bozi, J, Barta, Z, Singh, R & Jakab, E 2016, 'Thermoanalytical Characterization and Catalytic Conversion of Deoiled Micro Algae and Jatropha Seed Cake', Energy and Fuels, vol. 30, no. 10, pp. 7982-7993. https://doi.org/10.1021/acs.energyfuels.6b01024
Sebestyén, Zoltán ; Barta-Rajnai, Eszter ; Czégény, Z. ; Bhaskar, Thallada ; Krishna, Bhavya B. ; May, Zoltán ; Bozi, János ; Barta, Zsolt ; Singh, Rawel ; Jakab, E. / Thermoanalytical Characterization and Catalytic Conversion of Deoiled Micro Algae and Jatropha Seed Cake. In: Energy and Fuels. 2016 ; Vol. 30, No. 10. pp. 7982-7993.
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