Next Article in Journal / Special Issue
Catalytic Technologies for Biodiesel Fuel Production and Utilization of Glycerol: A Review
Previous Article in Journal
Oxidation Catalysts for Elemental Mercury in Flue Gases—A Review
Previous Article in Special Issue
Hydrogen Evolution from Napiergrass by the Combination of Biological Treatment and a Pt-Loaded TiO2-Photocatalytic Reaction
Open AccessArticle

Production of Bio-Hydrogenated Diesel by Hydrotreatment of High-Acid-Value Waste Cooking Oil over Ruthenium Catalyst Supported on Al-Polyoxocation-Pillared Montmorillonite

Biomass Technology Research Center, National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Center 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
*
Author to whom correspondence should be addressed.
Current address: Instituto Politecnico Nacional, Mexico ESIQIE, Mexico D.F. 07738, Mexico
Catalysts 2012, 2(1), 171-190; https://doi.org/10.3390/catal2010171
Received: 1 December 2011 / Revised: 19 January 2012 / Accepted: 7 February 2012 / Published: 14 February 2012
(This article belongs to the Special Issue Catalysts for Biomass Conversion)
Waste cooking oil with a high-acid-value (28.7 mg-KOH/g-oil) was converted to bio-hydrogenated diesel by a hydrotreatment process over supported Ru catalysts. The standard reaction temperature, H2 pressure, liquid hourly space velocity (LHSV), and H2/oil ratio were 350 °C, 2 MPa, 15.2 h–1, and 400 mL/mL, respectively. Both the free fatty acids and the triglycerides in the waste cooking oil were deoxygenated at the same time to form hydrocarbons in the hydrotreatment process. The predominant liquid hydrocarbon products (98.9 wt%) were n-C18H38, n-C17H36, n-C16H34, and n-C15H32 when a Ru/SiO2 catalyst was used. These long chain normal hydrocarbons had high melting points and gave the liquid hydrocarbon product over Ru/SiO2 a high pour point of 20 °C. Ru/H-Y was not suitable for producing diesel from waste cooking oil because it formed a large amount of C5–C10 gasoline-ranged paraffins on the strong acid sites of HY. When Al-polyoxocation-pillared montmorillonite (Al13-Mont) was used as a support for the Ru catalyst, the pour point of the liquid hydrocarbon product decreased to −15 °C with the conversion of a significant amount of C15–C18 n-paraffins to iso-paraffins and light paraffins on the weak acid sites of Al13-Mont. The liquid product over Ru/Al13-Mont can be expected to give a green diesel for current diesel engines because its chemical composition and physical properties are similar to those of commercial petro-diesel. A relatively large amount of H2 was consumed in the hydrogenation of unsaturated C=C bonds and the deoxygenation of C=O bonds in the hydrotreatment process. A sulfided Ni-Mo/Al13-Mont catalyst also produced bio-hydrogenated diesel by the hydrotreatment process but it showed slow deactivation during the reaction due to loss of sulfur. In contrast, Ru/Al13-Mont did not show catalyst deactivation in the hydrotreatment of waste cooking oil after 72 h on-stream because the waste cooking oil was not found to contain sulfur-containing compounds. View Full-Text
Keywords: bio-hydrogenated diesel; waste cooking oil; hydrotreatment; ruthenium; Al-polyoxocation; pillared montmorillonite bio-hydrogenated diesel; waste cooking oil; hydrotreatment; ruthenium; Al-polyoxocation; pillared montmorillonite
Show Figures

Figure 1

MDPI and ACS Style

Liu, Y.; Sotelo-Boyás, R.; Murata, K.; Minowa, T.; Sakanishi, K. Production of Bio-Hydrogenated Diesel by Hydrotreatment of High-Acid-Value Waste Cooking Oil over Ruthenium Catalyst Supported on Al-Polyoxocation-Pillared Montmorillonite. Catalysts 2012, 2, 171-190. https://doi.org/10.3390/catal2010171

AMA Style

Liu Y, Sotelo-Boyás R, Murata K, Minowa T, Sakanishi K. Production of Bio-Hydrogenated Diesel by Hydrotreatment of High-Acid-Value Waste Cooking Oil over Ruthenium Catalyst Supported on Al-Polyoxocation-Pillared Montmorillonite. Catalysts. 2012; 2(1):171-190. https://doi.org/10.3390/catal2010171

Chicago/Turabian Style

Liu, Yanyong; Sotelo-Boyás, Rogelio; Murata, Kazuhisa; Minowa, Tomoaki; Sakanishi, Kinya. 2012. "Production of Bio-Hydrogenated Diesel by Hydrotreatment of High-Acid-Value Waste Cooking Oil over Ruthenium Catalyst Supported on Al-Polyoxocation-Pillared Montmorillonite" Catalysts 2, no. 1: 171-190. https://doi.org/10.3390/catal2010171

Find Other Styles

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Search more from Scilit
 
Search
Back to TopTop