Study on a kinetic model of atmospheric gas oil pyrolysis and coke deposition

1993 ◽  
Vol 32 (5) ◽  
pp. 843-847 ◽  
Author(s):  
Renjun Zou ◽  
Qiangkun Lou ◽  
Sihong Mo ◽  
Shubo Feng
Keyword(s):  
Kinetic Model ◽  
Coke Deposition ◽  
Gas Oil

A New Approach to Determining Product Selectivity in Gas Oil Cracking Using a Four-Lump Kinetic Model

2002 ◽  
Vol 16 (3) ◽  
pp. 593-600 ◽  
Author(s):  
Siauw Ng ◽  
Jinsheng Wang ◽  
Yuxia Zhu ◽  
Ligang Zheng ◽  
Fuchen Ding ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Product Selectivity ◽  
Gas Oil ◽  
New Approach ◽  
Oil Cracking

6-Lump Kinetic Model for a Commercial Vacuum Gas Oil Hydrocracker

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Sepehr Sadighi ◽  
Arshad Ahmad ◽  
S. Reza Seif Mohaddecy
Keyword(s):  
Kinetic Model ◽  
Vacuum Gas Oil ◽  
Gas Oil ◽  
Decay Function ◽  
Absolute Deviation ◽  
Commercial Plant ◽  
Kinetic Coefficients ◽  
Final Approach ◽  
Order Of Magnitude ◽  
Middle Distillates

A 6-lump kinetic model, including a catalyst decay function for hydrocracking of vacuum gas oil in a commercial plant, is proposed. The model considers vacuum gas oil (VGO) and unconverted oil, having boiling point higher than 380-°C (380+°C) as one lump. Other lumps are diesel (260-380-°C), kerosene (150-260-°C), heavy naphtha (90-150-°C), light naphtha (40-90-°C) and gases (40-°C) as products. Initially, a kinetic network with thirty coefficients is considered, but following an evaluation using measured data and order of magnitude analysis, mainly the route passes of converting middle distillates to naphtha lumps are omitted; thus the number of kinetic coefficients is reduced to eighteen. This result is consistent with the reported characteristics of amorphous catalyst, which has the tendency to produce more distillates than naphtha. By using catalyst decay function in the kinetic model and replacing days on stream with a noble term, called accumulated feed, the prediction of the final approach during 1.5 years is in good agreement with the actual commercial data. The average absolute deviation (AAD%) of the model is less than 5% for all main products. If the residue or unconverted VGO is considered, the error only increases to 6.94% which is still acceptable for a commercial model. The results also confirm that the hydrocracking of VGO to upgraded products is represented better by a second order reaction.

4-Lump kinetic model for vacuum gas oil hydrocracker involving hydrogen consumption

2010 ◽  
Vol 27 (4) ◽  
pp. 1099-1108 ◽  
Author(s):  
Sepehr Sadighi ◽  
Arshad Ahmad ◽  
Mehdi Rashidzadeh
Keyword(s):  
Kinetic Model ◽  
Vacuum Gas Oil ◽  
Gas Oil ◽  
Hydrogen Consumption

Effect of coke deposition on the remaining activity of FCC catalysts during gas oil and residue cracking

2011 ◽  
Vol 16 (1) ◽  
pp. 70-74 ◽  
Author(s):  
Song Haitao ◽  
Da Zhijian ◽  
Zhu Yuxia ◽  
Tian Huiping
Keyword(s):  
Coke Deposition ◽  
Gas Oil ◽  
Fcc Catalysts

scholarly journals Dry Reforming of Methane over a Ruthenium/Carbon Nanotube Catalyst

2020 ◽  
Vol 4 (1) ◽  
pp. 16
Author(s):  
Yuan Zhu ◽  
Kun Chen ◽  
Robert Barat ◽  
Somenath Mitra
Keyword(s):  
Carbon Nanotube ◽  
Kinetic Model ◽  
Packed Bed ◽  
Dry Reforming ◽  
Gas Analysis ◽  
Packed Bed Reactor ◽  
Coke Deposition ◽  
Dry Reforming Of Methane ◽  
Reverse Water Gas Shift ◽  
Water Gas

In this study, CH4 dry reforming was demonstrated on a novel microwave-synthesized ruthenium (Ru)/carbon nanotube (CNT) catalyst. The catalyst was tested in an isothermal laboratory-packed bed reactor, with gas analysis by gas chromatography/thermal conductivity detection. The catalyst demonstrated excellent dry-reforming activity at modest temperatures (773–973 K) and pressure (3.03 × 105 Pa). Higher reaction temperatures favored increased conversion of CH4 and CO2, and increased H2/CO product ratios. Slight coke deposition, estimated by carbon balance, was observed at higher temperatures and higher feed CH4/CO2. A robust global kinetic model composed of three reversible reactions—dry reforming, reverse water gas shift, and CH4 decomposition—simulates observed outlet species concentrations and reactant conversions using this Ru/CNT catalyst over the temperature range of this study. This engineering kinetic model for the Ru/CNT catalyst predicts a somewhat higher selectivity and yield for H2, and less for CO, in comparison to previously published results for a similarly prepared Pt_Pd/CNT catalyst from our group.

Application of a Continuous Kinetic Model for the Hydrocracking of Vacuum Gas Oil

2014 ◽  
Vol 32 (18) ◽  
pp. 2245-2252 ◽  
Author(s):  
A. Arefi ◽  
F. Khorasheh ◽  
F. Farhadi
Keyword(s):  
Kinetic Model ◽  
Vacuum Gas Oil ◽  
Gas Oil

6-Lump Kinetic Model for a Commercial Vacuum Gas Oil Hydrocracker

ENERGYO ◽  
2018 ◽  
Author(s):  
Sepehr Sadighi ◽  
Arshad Ahmad ◽  
S. Reza Seif Mohaddecy
Keyword(s):  
Kinetic Model ◽  
Vacuum Gas Oil ◽  
Gas Oil
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