Effects of the Temperature and Initial Hydrogen Pressure on the Isomerization Reaction in Heavy Oil Slurry-Phase Hydrocracking

2015 ◽  
Vol 29 (2) ◽  
pp. 626-633 ◽  
Author(s):  
Hui Du ◽  
Dong Liu ◽  
Ming Li ◽  
Pingping Wu ◽  
Yuanxi Yang
Keyword(s):  
Heavy Oil ◽  
Hydrogen Pressure ◽  
Isomerization Reaction ◽  
Slurry Phase ◽  
Initial Hydrogen Pressure

Role of Hydrogen Pressure in Slurry-Phase Hydrocracking of Venezuela Heavy Oil

2015 ◽  
Vol 29 (4) ◽  
pp. 2104-2110 ◽  
Author(s):  
Hui Du ◽  
Dong Liu ◽  
Hua Liu ◽  
Peng Gao ◽  
Renqing Lv ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Hydrogen Pressure ◽  
Slurry Phase

Hydrogenation of methylacetylene. III. The reaction of methylacetylene with hydrogen catalyzed by nickel, copper, and their alloys

1968 ◽  
Vol 46 (4) ◽  
pp. 623-633 ◽  
Author(s):  
R. S. Mann ◽  
K. C. Khulbe
Keyword(s):  
Activation Energy ◽  
Nickel Catalyst ◽  
Hydrogen Pressure ◽  
Constant Volume ◽  
Temperature Dependent ◽  
Nickel Copper ◽  
Wide Range ◽  
Initial Hydrogen Pressure

The reaction between methylacetylene and hydrogen over unsupported nickel, copper, and their alloys has been investigated in a static constant volume system between 20 and 220 °C for a wide range of reactant ratios. The order of reaction with respect to hydrogen was one and nearly independent of temperature. While the order of reaction with respect to methylacetylene over nickel catalyst was slightly negative and temperature dependent, it was always positive and nearly independent of temperature for copper and copper-rich alloys. Selectivity was independent of initial hydrogen pressure for nickel and copper only; for others it decreased rapidly with increasing hydrogen pressure. The overall activation energy varied between 9 and 21.2 kcal/g mole. Selectivity and extent of polymerization increased with increasing amount of copper in the alloy.

Viscosity Reduction of Heavy Oil during Slurry-Phase Hydrocracking

2018 ◽  
Vol 42 (1) ◽  
pp. 148-155 ◽  
Author(s):  
Alexander Quitian ◽  
Yatzirih Fernández ◽  
Jorge Ancheyta
Keyword(s):  
Heavy Oil ◽  
Viscosity Reduction ◽  
Slurry Phase

Pd/SiO2–AlPO4 systems. Influence of the preparation variables on their catalytic activity

1985 ◽  
Vol 63 (12) ◽  
pp. 3471-3477 ◽  
Author(s):  
A. Alba ◽  
M. A. Aramendia ◽  
V. Borau ◽  
C. Jimenez ◽  
J. M. Marinas
Keyword(s):  
Catalytic Activity ◽  
Liquid Phase ◽  
Reaction Temperature ◽  
Hydrogen Pressure ◽  
Pd Catalysts ◽  
Metal Precursor ◽  
Preparation Conditions ◽  
Liquid Phase Hydrogenation ◽  
Initial Hydrogen Pressure ◽  
Catalyst Reduction

A study on the liquid phase hydrogenation of cyclohexene over a series of Pd catalysts supported on various SiO2–AlPO4 systems (using a concentration of 2.47 M, with methanol as solvent, the initial hydrogen pressure is 5 bar and reaction temperature 300 K) is reported in this paper. The reaction has been studied as a standard in order to determine the most suitable preparation conditions for these catalystsWe have also studied the influence of other factors such as the kind of support, the nature of the metal precursor, the previous calcination of the precursor, the addition of alkaline hydroxides, and the catalyst reduction with various agents, on the catalytic activity of different Pd-supported systems

Catalytic Activity and Physical Properties of Nanoparticles Metal Supported on Bentonite for Hydrogenolysis of Glycerol

2011 ◽  
Vol 364 ◽  
pp. 211-216
Author(s):  
Noraini Hamzah ◽  
Wan Nor Roslam Wan Isahak ◽  
Nadia Farhana Adnan ◽  
Nor Asikin Mohamad Nordin ◽  
Mohamad Bin Kassim ◽  
...  
Keyword(s):  
High Activity ◽  
Hydrogen Pressure ◽  
Au Nanoparticles ◽  
Catalyst System ◽  
Impregnation Method ◽  
Tem Analysis ◽  
Glycerol Hydrogenolysis ◽  
Initial Hydrogen Pressure ◽  
Catalyst Acidity ◽  
Average Size

Catalysts prepared from a variety of noble metal (Os, Ru, Pd and Au) supported on bentonite using impregnation method were studied and it found these series catalyst system gave different activity and selectivity. Among these catalysts, Os/bentonite and Ru/bentonite catalyst showed high activity in glycerol hydrogenolysis reaction at 150°C, 2.0 MPa initial hydrogen pressure for 7 hours. TEM analysis revealed that these nanometal particles catalyst have different in size and result showed that Os and Ru which have smaller average size in range 1-3 nm gave high activity which are 54.1% and 61.2% respectively. In contrast, less activity was obtained when using Pd/bentonite (29.0%) and Au/bentonite (27.8%) catalyst and TEM result showed that Pd and Au nanoparticles have large average particles size (8-10) nm. NH3-TPD analysis revealed that Ru/bentonite and Os/bentonite catalyst gave high total acidity and this behaviour contribute to high activity of the catalyst. This study revealed that size of nanoparticles and catalyst acidity play an important role in the activity and selectivity in glycerol hydrogenolysis reaction. These catalysts were also characterized by BET, XRD and XPS in order to get some physicochemical properties of the catalyst.

Application of Hydrogen Storage Materials in Hydrogenation of Coal-Derived Preasphaltene

2011 ◽  
Vol 236-238 ◽  
pp. 668-671
Author(s):  
Shi Gang Kang ◽  
Zhi Min Zong ◽  
Heng Fu Shui ◽  
Zhi Cai Wang ◽  
Xian Yong Wei
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Pressure ◽  
Structural Characteristics ◽  
Gas Oil ◽  
Hydrogen Storage Materials ◽  
Reaction Conditions ◽  
Storage Materials ◽  
Heavy Product ◽  
Initial Hydrogen Pressure ◽  
Increasing Temperature

The hydrogenation of preasphaltene (PA), from Chinese Xiaolongtan lignite liquefied heavy product, was investigated with hydrogen storage materials in a batch autoclave. The effects of reaction conditions such as hydrogen storage materials and temperature on the yields of gas+oil, asphaltene, char and the conversions of preasphaltene were discussed. Preliminary studies indicate that increasing temperature not only improves hydrogen donor performance of hydrogen storage materials but also enhances conversion of feedstock PA and gas+oil yield. The conversion of PA and the yield gas+oil get to 72.02% and 41.46%, respectively, under 5% MgH2, 5MPa initial hydrogen pressure, temperature 420°C and reaction time 30min. Meanwhile MgH2 is stronger than NaBH4 in hydrodeoxygenation of PA under the same conditions. Elemental and FTIR analyses were used to illustrate the structural characteristics of feedstock PA and remaining preasphaltene (RPA).

THE EFFECT OF TIME AND TEMPERATURE ON THE HYDROGENATION OF ASPEN LIGNIN

1963 ◽  
Vol 41 (11) ◽  
pp. 2867-2875 ◽  
Author(s):  
J. M. Pepper ◽  
Warren Steck
Keyword(s):  
Hydrogen Pressure ◽  
Gas Liquid Chromatography ◽  
Alkyl Ether ◽  
Klason Lignin ◽  
Aryl Ether ◽  
Soluble Product ◽  
Raney Nickel Catalyst ◽  
Initial Hydrogen Pressure ◽  
Relationship Of ◽  
The Relationship

A study has been made of the hydrogenation of preextracted aspen sapwood meal under conditions whereby the lignin is degraded to identifiable products. By gas liquid chromatography, guaiacol, 4-methylguaiacol, 4-ethylguaiacol, 4-n-propylguaiacol, dihydroconiferyl alcohol, syringol, 4-methylsyringol, 4-ethylsyringol, 4-n-propylsyringol, and dihydrosinapyl alcohol were separated and identified.The relative abundance of these 10 compounds was determined in the chloroform-soluble product after hydrogenation using a dioxane–water (1:1) solvent medium, Raney nickel catalyst, an initial hydrogen pressure of 500 p.s.i. and temperatures of 150°, 165°, 185°, 195°, 210°, and 220° for a reaction time of 5 hours and a temperature of 195° for times of 0, 1.3, 5.0, and 24 hours. The best yield (52.2% of the Klason lignin) of such phenolic derivatives was obtained at a reaction temperature of 195° for 5 hours.The significance of the observed variation in the yields of these compounds with time and temperature and the relationship of these yields to the structure of lignin is discussed. Evidence is presented in support of both γ-alkyl ether and β-aryl ether linkages in the lignin substance.

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