Alternative diesel fuels with high hydrogen content in their molecular structures

Jenő Hancsók, Olivér Visnyei, András Holló, László Leveles, Artur Thernesz, Géza Varga and József Valyon

Renewable Energy, 2019, vol. 142, issue C, 239-248

Abstract: Alternative fuel components have a continuously growing use worldwide. Hydrocarbons with high hydrogen to carbon ratio in their molecular structures are the most suitable alternative fuels. In this paper the special hydrocracking of waste fatty acids and waste lard to paraffin mixtures over sulfided NiMoP/Al2O3 is presented. The effect of feedstock additives was investigated on the catalyst performance, such as activity, selectivity, product yield and catalyst lifetime. It was concluded that coke precursors, which were formed from olefinic components reduced the catalyst performance. Olefins were generated as intermediates of hydrocracking but could be present also in the feedstocks. Based on the results it was also concluded that application of amine and phenol type additives in the feedstocks inhibited the formation of coke precursors and coke. Results of catalytic tests having length of ca. 1000 h were compared. Applying 200 mg/kg additive in favorable combination resulted in about 21–37 wt% increase in the yield of target products relative to that using feedstock without additives. The obtained target products were rich in n-paraffins and represented diesel blending components of >85 cetane number. Various ideas are proposed for the utilization of the obtained bio-paraffin mixture.

Keywords: Alternative diesel fuel; High H/C ratio; Hydrocracking additives; Catalyst lifetime; Long-term experiment; Special hydrocracking (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148119305890
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:142:y:2019:i:c:p:239-248

DOI: 10.1016/j.renene.2019.04.105

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().