scholarly journals Molecular-level reaction network in delayed coking process based on structure-oriented lumping

2021 ◽  
Author(s):  
Lei Ye ◽  
Biao Xing ◽  
Jichang Liu ◽  
Xinglong Qin ◽  
Wenxin Yu ◽  
...  
Keyword(s):  
Molecular Level ◽  
Reaction Network ◽  
Product Distribution ◽  
Delayed Coking ◽  
Operation Conditions ◽  
Recycle Ratio ◽  
Cracking Reaction ◽  
Structural Increments ◽  
Level Model ◽  
Group Compositions

Based on the structure-oriented lumping method, a molecular-level reaction kinetic model of the delayed coking process, which adopted 24 structural increments to construct the feed molecular matrix containing 2,944 molecules, was established with a reaction network containing 74,581 reactions using MATLAB. The reliability of the model was verified by experimental results. According to the discriminant rules of structural increments, 173 structural vectors in gasoline and 1,132 structural vectors in diesel were classified into different group compositions, respectively. The model could track the reaction path of any specific molecule in the complex thermal cracking reaction network. The influences of operation conditions such as recycle ratio on the product distribution could be discovered through the calculation of the molecular-level model, which is helpful for the process optimization and precise regulation of product composition for the delayed coking plants.

Calculation of Reaction Network and Product Properties of Delayed Coking Process Based on Structural Increments

2021 ◽  
pp. 133764
Author(s):  
Lei Ye ◽  
Xinglong Qin ◽  
Alqubati Murad ◽  
Jichang Liu ◽  
Qiang Ying ◽  
...  
Keyword(s):  
Reaction Network ◽  
Delayed Coking ◽  
Structural Increments

scholarly journals Molecular-level reaction network in delayed coking process based on structure-oriented lumping

2021 ◽  
pp. 116981
Author(s):  
Lei Ye ◽  
Jichang Liu ◽  
Biao Xing ◽  
Xinglong Qin ◽  
Wenxin Yu ◽  
...  
Keyword(s):  
Molecular Level ◽  
Reaction Network ◽  
Delayed Coking

Hidden in its color: A molecular-level analysis of the beer’s Maillard reaction network

2021 ◽  
pp. 130112
Author(s):  
Stefan A. Pieczonka ◽  
Daniel Hemmler ◽  
Franco Moritz ◽  
Marianna Lucio ◽  
Martin Zarnkow ◽  
...  
Keyword(s):  
Maillard Reaction ◽  
Molecular Level ◽  
Reaction Network ◽  
Level Analysis

Role of recycle ratio in delayed coking process

1982 ◽  
Vol 18 (12) ◽  
pp. 625-627
Author(s):  
S. M. Kapustin ◽  
N. P. Zaitseva ◽  
E. V. Smidovich
Keyword(s):  
Delayed Coking ◽  
Recycle Ratio

Reaction Network of Sulfur Compounds in Delayed Coking Process

2021 ◽  
pp. 129903
Author(s):  
Biao Xing ◽  
Lei Ye ◽  
Jichang Liu ◽  
Xinglong Qin ◽  
Wenxin Yu ◽  
...  
Keyword(s):  
Reaction Network ◽  
Sulfur Compounds ◽  
Delayed Coking

scholarly journals Optimization of Product Distribution in the Heavy Oil Vacuum Residue High Value-added Process by Using Additives

2020 ◽  
Vol 194 ◽  
pp. 01031
Author(s):  
Shiguang Fan ◽  
Guanjun Xu ◽  
He Liu ◽  
Jian Wang ◽  
Zongxian Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Heavy Oil ◽  
Heteropoly Acid ◽  
Value Added ◽  
Product Distribution ◽  
Fuel Oil ◽  
Vacuum Residue ◽  
Chemical Additives ◽  
Delayed Coking ◽  
Light Oil

The increase in demand for fuel oil has brought higher challenges to the high value-added process of heavy oil vacuum residue, especially for delayed coking units. For optimization of product distribution, the effects of reaction temperature and chemical additives were discussed. The results show that high temperature and 1 wt% of the heteropoly acid (HPA) could increase the light oil yield in the experimental delayed coking simulation device.

scholarly journals Conversion of Oxygenates on H-ZSM-5 Zeolites—Effects of Feed Structure and Si/Al Ratio on the Product Quality

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 432
Author(s):  
Torsten Gille ◽  
Markus Seifert ◽  
Mathias S. Marschall ◽  
Sascha Bredow ◽  
Tobias Schneider ◽  
...  
Keyword(s):  
Reaction Network ◽  
Product Distribution ◽  
Zeolite Catalysts ◽  
Primary Alcohols ◽  
Reaction Sequence ◽  
Al Content ◽  
Multi Stage ◽  
Flexible Adaptation ◽  
The Relationship ◽  
Subsequent Integration

The conversion of different biogenic feedstocks to hydrocarbons is a major challenge when ensuring hydrocarbon and fuel supply in spite of the heterogeneity of this feed. Flexible adaptation to changing compositions is mandatory for the respective processes. In this study, different oxygenate model feeds, such as alcohols, aldehydes, carboxylic acids and esters, were converted at 500 °C and 5 barg H2 using H-ZSM-5 zeolite catalysts with various Si/Al ratios to identify the relationship between the feed structure and the final product distribution. As the main outcome, the product distribution becomes increasingly independent of the feed structure for Al-rich H-ZSM-5 catalyst samples at low Time on Stream (ToS). Some minor exceptions are the increased formation of aromatics during ToS for carbonyl oxygenates compared to primary alcohols and the dominance of initial deoxygenation products for Si-rich H-ZSM-5 samples. This is interpreted by a multi-stage reaction sequence, which involves the initial deoxygenation of the feed and the subsequent integration of the olefin intermediates into a reaction network. The results pave the way towards the achievement of a desired product distribution in the conversion of different oxygenates simply by the adaption of the Al content of H-ZSM-5.

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