Emerson, Rachel Deutch, Steve Starace, Anne Kutnyakov, Igor V. Westover, Tyler Carpenter, Daniel Santosa, Daniel M. The density and kinematic viscosity were consistent with the specification ofįield-to-Fuel Performance Testing of Lignocellulosic Feedstocks: An Integrated Study of the Fast Pyrolysis/ Hydrotreating Pathway Physiochemical analysis of the diesel fraction exhibit satisfactory properties. The amount of isoparaffins catalyzed by NiMo/γ-Al_2O_3 and Pd/C were 10.8 and 1.7 wt%, respectively. However, NiMo/γ-Al_2O_3 shows higher isomerization activity. Moreover, Pd/C gave higher olefin content in liquid product (22.3 wt%) than NiMo/γ-Al_2O_3 (4.8 wt%). In addition, although increased H_2/oil promoted overall reaction and hydrodeoxygenation activity (C_n_−_1/C_n decreased) for both catalysts, hydrocracking is enhanced over Pd/C, leading to significant increase in gasoline yield. Unfavorable cracking of diesel product is pronounced at high temperature and prolonged reaction time. The liquid products mostly consisted of n-pentadecane and n-heptadecane, which contain one carbon atom shorter than the corresponding fatty acid (C_n_−_1) i.e.
It was found that the reaction time of 2 h and the reaction temperature of 400 Â☌ are favorable operating conditions. reaction time, operating temperature, and H_2/oil. NiMo/γ-Al_2O_3 and Pd/C with different operating parameters i.e. Hydrotreating of extracted oil was performed over two catalysts i.e.
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As the extracted oil contained high content of free fatty acids (6.14%), therefore one step alkali-catalyzed for ester based biodiesel production is impractical. In the present work, oil yield up to 13% can be obtained by Soxhlet extraction with hexane as a solvent. Abstract: Oil extracted from spent coffee grounds is utilized as a renewable source for bio- hydrotreated fuel production. • The physiochemical properties of diesel fraction comply with commercial standard. • The diesel fuel fraction can have a cetane number as high as 80. • Pd/C gave higher olefins while NiMo/γ-Al_2O_3 gave higher isoparaffins liquid products. Highlights: • The spent coffee oil with high FFAs was hydrotreated to liquid biofuel. Phimsen, Songphon Kiatkittipong, Worapon Yamada, Hiroshi Tagawa, Tomohiko Kiatkittipong, Kunlanan Laosiripojana, Navadol Assabumrungrat, Suttichai International Nuclear Information System (INIS) Oil extracted from spent coffee grounds for bio- hydrotreated diesel production Modeling of the process was performed with UniSim Design®.
During the three phases of conceptual, detailed, and final design, unit operations were designed and sized. van den Berg, Henderikus van der Ham, Aloysius G.J.Ī systematic approach was applied to study the process of hydrotreating vegetable oils. Sprakel, Lisette Maria Johanna van den Enk, L.B.J. Green Diesel from Hydrotreated Vegetable Oil Process Design Study
of 284 C) showed product sulphur levels which were not higher than those obtained by hydrotreatment of the straight run gas oil, indicating that undercutting the FCC LCO gives the refiner the opportunity to increase the potential for the production of 10 ppm sulphur diesel at the conditions of the conventional hydrotreating unit operating at low pressure. The hydrotreatment tests on a blend 80% straight run gas oil (ASTM D-86 95% vol.
points below 333 C, which is accompanied by about 10% reduction of the diesel potential. However the 10ppm sulphur limit could be met only by feedstocks with 95% vol. The specification of 50 ppm sulphur was achieved with all studied feedstocks. For all LHSVs and reactor inlet temperatures studied the product sulphur dependence on the feed 340 C+ fraction content was approximated by second order power law. It was found that the determinant factor for the attainment of ultra low sulphur levels during middle distillate hydrodesulphurization was not the total sulphur content in the feed but the content of the material boiling above 340 C (according to TBP). The fractionated diesel product, called ''white'' diesel exhibits excellent fuel properties including higher heating value (over 49 MJ/kg), negligible acidity, higher oxidation stability and higher cetane number (. The technology was evaluated in hydroprocessing pilot plants of CERTH where feedstock origin as well as optimal catalysts and operating parameters where identified. The main premise of this process is the conversion of the WCO fatty acids into normal- and iso-paraffins. Catalytic hydrotreating of waste cooking oil for renewable diesel productionĮnergy Technology Data Exchange (ETDEWEB)īezergianni, Stella Dimitriadis, Athanasios [Centre for Research and Technology Hellas (CERTH), Thessaloniki (Greece)Ī new technology based on catalytic hydrotreating of Waste Cooking Oil (WCO) for biodiesel production has been developed in the Centre for Research and Technology Hellas (CERTH).
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