Producing diesel fuel by co-hydrogenation of vegetable oil with gas oil

Csaba Tóth, Péter Baladincz, Sándor Kovács, J. Hancsók

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

During the investigation our goal was the production of partially bio derived fuels in the gas oil boiling point range. In the last few years, to eliminate the unfavourable properties of biodiesels (FAME) intensive research has begun to convert the triglycerides (e.g. vegetable oils, fats, etc.) to products with other chemical structure. One of the examined different thermal and catalytic possibilities can be the positive solution the quality improvement of vegetable oils and gas oils together (co-processing). The aim of our experimental work was to produce product mixtures with high yield, and with maximum 10 mg/kg sulphur content from mixtures of high-sulphur gas oil (about 1.0%) and vegetable oil raw materials. In the co-hydrogenation experiments we applied mixtures of gas oil with different vegetable oil content (0 %, 5 %, 15 %, 25 %, 100 %). NiMo/Al2O3 catalyst with targeted composition was used as a catalyst. In case of all feedstocks the same process parameter combinations were used (T=300-380 °C, P=60-80 bar, LHSV=1.0 h -1, H2/HC=600 Nm3/m3), which were selected on basis of the results of our pre-experiments. We investigated the effect of the process parameters and the vegetable oil content of the feedstocks on the yield, the physical-, chemical- and application properties of the main product. On the basis of the results we obtained that both the vegetable oil conversion reactions (saturation of olefinic double bonds, deoxigenation) and gas oil quality improvement reactions (heteroatom-, mainly sulphur removal, aromatic content reduction) took place. Under the favourable operational conditions (360-380 °C, P=80 bar, LHSV=1.0 h-1, H 2/HC=600 Nm3/m3 and 15% vegetable oil content of feed) the main properties of the high-yield products except for the CFPP value satisfied the requirements of standard EN 590:2009. The amount of vegetable oil higher than 15% reduced the desulphurisation efficiency, whereas the removal of heteroatoms took place on the same active centres of the catalyst, so the deoxigenation reactions forced back the desulphurisation reactions because of the intake of large quantities of oxygen with the triglyceride molecule. Based on the results we concluded that an existing hydrogenation plant may be suitable for the co-processing of vegetable oil and gas oil mixtures. In a single step the quality improvement of gas oil (sulphur, nitrogen, aromatic content reduction) and the vegetable oil conversion to n- and i-paraffins can be achieved. The products - depending on the vegetable oil content of the feedstocks - have an increased n- and i-paraffin content, so their cetane numbers must be high, too.

Original languageEnglish
Title of host publicationChemical Engineering Transactions
PublisherItalian Association of Chemical Engineering - AIDIC
Pages1219-1224
Number of pages6
Volume21
ISBN (Print)9788895608051
DOIs
Publication statusPublished - 2010

Publication series

NameChemical Engineering Transactions
Volume21
ISSN (Print)19749791

Fingerprint

Plant Oils
Vegetable oils
Gas oils
Diesel fuels
Hydrogenation
Sulfur
Feedstocks
Paraffin
Paraffins
Catalysts
Triglycerides
Antiknock rating
Boiling point
Desulfurization
Processing
Oils and fats
Raw materials
Nitrogen
Experiments
Fats

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Tóth, C., Baladincz, P., Kovács, S., & Hancsók, J. (2010). Producing diesel fuel by co-hydrogenation of vegetable oil with gas oil. In Chemical Engineering Transactions (Vol. 21, pp. 1219-1224). (Chemical Engineering Transactions; Vol. 21). Italian Association of Chemical Engineering - AIDIC. https://doi.org/10.3303/CET1021204

Producing diesel fuel by co-hydrogenation of vegetable oil with gas oil. / Tóth, Csaba; Baladincz, Péter; Kovács, Sándor; Hancsók, J.

Chemical Engineering Transactions. Vol. 21 Italian Association of Chemical Engineering - AIDIC, 2010. p. 1219-1224 (Chemical Engineering Transactions; Vol. 21).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tóth, C, Baladincz, P, Kovács, S & Hancsók, J 2010, Producing diesel fuel by co-hydrogenation of vegetable oil with gas oil. in Chemical Engineering Transactions. vol. 21, Chemical Engineering Transactions, vol. 21, Italian Association of Chemical Engineering - AIDIC, pp. 1219-1224. https://doi.org/10.3303/CET1021204
Tóth C, Baladincz P, Kovács S, Hancsók J. Producing diesel fuel by co-hydrogenation of vegetable oil with gas oil. In Chemical Engineering Transactions. Vol. 21. Italian Association of Chemical Engineering - AIDIC. 2010. p. 1219-1224. (Chemical Engineering Transactions). https://doi.org/10.3303/CET1021204
Tóth, Csaba ; Baladincz, Péter ; Kovács, Sándor ; Hancsók, J. / Producing diesel fuel by co-hydrogenation of vegetable oil with gas oil. Chemical Engineering Transactions. Vol. 21 Italian Association of Chemical Engineering - AIDIC, 2010. pp. 1219-1224 (Chemical Engineering Transactions).
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