The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Athanasios Dimitriadis - One of the best experts on this subject based on the ideXlab platform.
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temperature effect on co hydroprocessing of heavy gas oil waste cooking oil mixtures for hybrid diesel production
Fuel, 2013Co-Authors: Stella Bezergianni, Athanasios DimitriadisAbstract:Abstract The effect of temperature on Hydrotreating of heavy gas oil (HGO)–waste cooking oil (WCO) mixtures was studied. Three different types of feedstock were studied, 100% HGO, 90/10 HGO/WCO and 70/30 HGO/WCO. Temperature is the most dominant operating parameter which defines catalyst performance as well as catalyst life. In this analysis, a Hydrotreating temperature range of 310–350 °C was explored via a series of three experiments (310 °C, 330 °C and 350 °C). Several parameters were considered for evaluating the effect of temperature including heteroatom removal, conversion, pour point, hydrogen consumption and saturation of double bonds. For all experiments the same commercial Hydrotreating catalyst was utilized (NiMo/Al2O3), while the remaining operating parameters were kept constant (pressure = 1200 psig, LHSV = 1.0 h−1, H2/Oil ratio = 505.9 nl/l, liquid feed = 40 ml/h, and gas feed = 21804 ml/h).
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Temperature effect on co-hydroprocessing of heavy gas oil–waste cooking oil mixtures for hybrid diesel production
Fuel, 2013Co-Authors: Stella Bezergianni, Athanasios DimitriadisAbstract:Abstract The effect of temperature on Hydrotreating of heavy gas oil (HGO)–waste cooking oil (WCO) mixtures was studied. Three different types of feedstock were studied, 100% HGO, 90/10 HGO/WCO and 70/30 HGO/WCO. Temperature is the most dominant operating parameter which defines catalyst performance as well as catalyst life. In this analysis, a Hydrotreating temperature range of 310–350 °C was explored via a series of three experiments (310 °C, 330 °C and 350 °C). Several parameters were considered for evaluating the effect of temperature including heteroatom removal, conversion, pour point, hydrogen consumption and saturation of double bonds. For all experiments the same commercial Hydrotreating catalyst was utilized (NiMo/Al2O3), while the remaining operating parameters were kept constant (pressure = 1200 psig, LHSV = 1.0 h−1, H2/Oil ratio = 505.9 nl/l, liquid feed = 40 ml/h, and gas feed = 21804 ml/h).
Avelino Corma - One of the best experts on this subject based on the ideXlab platform.
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processing biomass in conventional oil refineries production of high quality diesel by Hydrotreating vegetable oils in heavy vacuum oil mixtures
Applied Catalysis A-general, 2007Co-Authors: George W Huber, Paul Oconnor, Avelino CormaAbstract:Renewable liquid alkanes can be produced by Hydrotreating of vegetable oils and vegetable oil‐heavy vacuum oil (HVO) mixtures at standard Hydrotreating conditions (i.e. 300‐450 8C) with conventional Hydrotreating catalysts (sulfided NiMo/Al2O3). The reaction pathway involves hydrogenation of the C C bonds of the vegetable oils followed by alkane production by three different pathways: decarbonylation, decarboxylation and hydrodeoxygenation. The straight chain alkanes can undergo isomerization and cracking to produce lighter and isomerized alkanes. The carbon molar yield of straight chain C15‐C18 alkanes was 71% on a carbon basis (the maximum theoretical yield for these products is 95%) for Hydrotreating of pure vegetable oil under optimal reaction conditions. The rate of alkane production from pure sunflower oil is greater than the rate of hydrodesulfurization of a HVO with a 1.48 wt% sulfur content (e.g. 100% conversion of sunflower oil at 350 8C compared to 41% conversion of sulfur). The yield of straight chain alkanes increases when sunflower oil is mixed with HVO, illustrating that dilution of HVO can improve the reaction chemistry. For example, with a 5 wt% sunflower oil‐95 wt% HVO feed the maximum theoretical straight chain C15‐C18yield from the sunflower oil was higher (87%) than it was with the pure sunflower oil (75%). Mixing the sunflower oil with HVO does not decrease the rate of desulfurization indicating that sunflower oil does not inhibit the Hydrotreating of HVO. # 2007 Elsevier B.V. All rights reserved.
Stella Bezergianni - One of the best experts on this subject based on the ideXlab platform.
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temperature effect on co hydroprocessing of heavy gas oil waste cooking oil mixtures for hybrid diesel production
Fuel, 2013Co-Authors: Stella Bezergianni, Athanasios DimitriadisAbstract:Abstract The effect of temperature on Hydrotreating of heavy gas oil (HGO)–waste cooking oil (WCO) mixtures was studied. Three different types of feedstock were studied, 100% HGO, 90/10 HGO/WCO and 70/30 HGO/WCO. Temperature is the most dominant operating parameter which defines catalyst performance as well as catalyst life. In this analysis, a Hydrotreating temperature range of 310–350 °C was explored via a series of three experiments (310 °C, 330 °C and 350 °C). Several parameters were considered for evaluating the effect of temperature including heteroatom removal, conversion, pour point, hydrogen consumption and saturation of double bonds. For all experiments the same commercial Hydrotreating catalyst was utilized (NiMo/Al2O3), while the remaining operating parameters were kept constant (pressure = 1200 psig, LHSV = 1.0 h−1, H2/Oil ratio = 505.9 nl/l, liquid feed = 40 ml/h, and gas feed = 21804 ml/h).
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Temperature effect on co-hydroprocessing of heavy gas oil–waste cooking oil mixtures for hybrid diesel production
Fuel, 2013Co-Authors: Stella Bezergianni, Athanasios DimitriadisAbstract:Abstract The effect of temperature on Hydrotreating of heavy gas oil (HGO)–waste cooking oil (WCO) mixtures was studied. Three different types of feedstock were studied, 100% HGO, 90/10 HGO/WCO and 70/30 HGO/WCO. Temperature is the most dominant operating parameter which defines catalyst performance as well as catalyst life. In this analysis, a Hydrotreating temperature range of 310–350 °C was explored via a series of three experiments (310 °C, 330 °C and 350 °C). Several parameters were considered for evaluating the effect of temperature including heteroatom removal, conversion, pour point, hydrogen consumption and saturation of double bonds. For all experiments the same commercial Hydrotreating catalyst was utilized (NiMo/Al2O3), while the remaining operating parameters were kept constant (pressure = 1200 psig, LHSV = 1.0 h−1, H2/Oil ratio = 505.9 nl/l, liquid feed = 40 ml/h, and gas feed = 21804 ml/h).
Ignacio Elizalde - One of the best experts on this subject based on the ideXlab platform.
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dynamic modeling and simulation of Hydrotreating of gas oil obtained from heavy crude oil
Applied Catalysis A-general, 2012Co-Authors: Fabián S. Mederos, Jorge Ancheyta, Ignacio ElizaldeAbstract:Abstract This paper describes a dynamic heterogeneous one-dimensional model of trickle-bed reactor used for catalytic Hydrotreating of oil fractions. The model takes into consideration the main reactions occurring in the Hydrotreating process: hydrodesulfurization, hydrodenitrogenation, hydrodearomatization (mono-, di-, and polyaroamatics), olefins hydrogenation, and mild hydrocracking (gas oil, naphtha, and gases). Kinetic parameters were determined from experimental data obtained in an isothermal bench-scale reactor during Hydrotreating of atmospheric gas oil coming from a heavy crude oil over a commercial CoMo catalyst. The developed model was used to predict the dynamic behavior of an industrial Hydrotreating reactor within a wide range of reaction conditions. Changes in concentration, partial pressure, and temperature profiles are simulated and discussed as a function of reactor axial position and time. The simulation results obtained with the proposed dynamic model showed good agreement with experimental data.
Tomas Viverosgarcia - One of the best experts on this subject based on the ideXlab platform.
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a reactive distillation process for co Hydrotreating of non edible vegetable oils and petro diesel blends to produce green diesel fuel
Computers & Chemical Engineering, 2017Co-Authors: Eduardo S Perezcisneros, Mauricio Salescruz, Ricardo Lobooehmichen, Tomas ViverosgarciaAbstract:Abstract A reactive distillation (RD) process for the Hydrotreating (HDT) of vegetable oils and sulphured petro-diesel to produce green diesel is developed. Process intensification (PI) of a reactive separation unit that combines both, the hydrodeoxigenation (HDO) of triglycerides and free fatty acids and the hydrodesulfurization (HDS) of petroleum-diesel reactions, is carried out. PI considers the thermodynamic analysis of model mixtures of vegetable oils with hexadecane and hydrogen to determine the appropriate operating conditions (temperature, pressure and composition blends) of the RD process. Two different Hydrotreating RD column configurations are proposed. The simulation of the Hydrotreating RD processes is performed with the Aspen Plus environment using the PC-SAFT option to modelling the phase equilibria. Simulation results show that the performance of the Hydrotreating RD process is more energy efficient and higher yields are attained when blends of vegetable oils with high free fatty acids content and petro-diesel are premixed and further hydrotreated.
