Aliphatic Alkylation

in Petroleum Refining

1st Edition - November 1, 2024
Authors: Weizhen Sun, Weizhong Zheng, Huanxin Gao, Ling Zhao, Jinzhu Li
Language: English
Paperback ISBN:
9 7 8 - 0 - 4 4 3 - 2 1 9 8 4 - 9
eBook ISBN:
9 7 8 - 0 - 4 4 3 - 2 1 9 8 5 - 6

Since the direct distillation of oil fractions does not satisfy the whole demand for fuel feedstocks, processes such as reforming, isomerization, and alkylation are needed to fu… Read more

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Since the direct distillation of oil fractions does not satisfy the whole demand for fuel feedstocks, processes such as reforming, isomerization, and alkylation are needed to fulfill the market requirements within the gasoline pool. From the processes mentioned above, Aliphatic alkylation is one of the most important refining processes due to the high quality of the alkylate with high research octane number (RON). Although the Aliphatic alkylation with H2SO4 and HF as catalysts have been industrialized for many years, there still exists lots of problems due to the complex heterogeneous reaction, such as the thermodynamics, reaction mechanism, molecular-level interfacial properties, and so on.

Aliphatic Alkylation: in Petroleum Refining gives detailed description about the above questions, providing the fundamental understanding the alkylation process from the molecular-level interfacial properties to the macroscopic industry plant.

1. Introduction

1.1 Definition of Aliphatic alkylation

1.2 History of Aliphatic alkylation

1.3 Role of Aliphatic alkylation unit in the refinery

1.4 Other alkylation processes
This chapter mainly gives the detailed description about the definition and the history of alkylation. In addition, the role of Aliphatic alkylation unit in the refinery will be further emphasized. The aim of this chapter is to make the reader understand the fundamental concepts of the alkylation.

2. Alkylation catalysts and general operation parameters

2.1 Sulfuric acid

2.1.1 Feed

2.1.2 Temperature

2.1.3 Reaction time

2.2 HF 2.2.1 Feed

2.2.2 Temperature

2.2.3 Reaction time

2.3 Chloroaluminate ionic liquids

2.3.1 Feed2.3.2 Temperature

2.3.3 Reaction time

2.4 Zeolites

2.4.1 Feed

2.4.2 Temperature

2.4.3 Reaction time
This chapter describes the catalysts for the alkylation, including the sulfuric acid, HF, ionic liquids, and solid acid. The research progress of these catalysts for the alkylation will be listed, respectively. The advantages and disadvantages of these catalysts will be summarized. Furthermore, the trend of development of these catalysts in the industrial application will be introduced, providing the reference for the industrial alkylation process. In addition, for different catalysts, the effect of the operating parameters on the Aliphatic alkylation.

3. Reaction Thermodynamics
This chapter solves the thermodynamics analysis of the complex alkylation reactions, giving the detailed thermodynamics path and the thermodynamics computation for the reactions.

4. Transport behaviors

4.1 Mass transport

4.2 Heat transport The transport processes will be introduced for the alkylation.

5. Reaction mechanism This chapter will give the general reaction mechanism for the alkylation.

6. Reaction kinetics

6.1 Kinetics using sulfuric acid as catalyst

6.2 Kinetics using ionic liquid as catalyst

6.3 Kinetics using sulfuric acid and additives as catalyst This chapter provides the reaction mechanism and kinetics model. The kinetics parameters for sulfuric acid, ionic liquids, waste acid with and without additives will be outlined.

7. Reactors, Catalysts deactivation and regeneration

7.1 Industrial reactors7.2 Deactivation mechanism

7.2.1 Sulfuric acid

7.2.2 HF

7.2.3 Ionic liquid

7.2.4 Solid acids

7.3 Regeneration strategies This chapter will describe the study on reactor. Based on the reactors, the deactivation of various catalysts will be introduced, figuring out the key deactivation mechanism of various catalysts and the corresponding regeneration strategy.

8. Process intensification

8.1 Process optimization

8.2 Interfacial behaviors

8.3 Intensification mechanism of interfacial behaviors

8.4 Design of interfacial intensification additives
This chapter mainly describes the process optimization. The role of the interfacial behaviors on the alkylation will be introduced. The investigated method for the interfacial properties of alkylation will be given. The detailed interfacial behaviors of alkylation, including interfacial structure, interface compositions, interfacial tension, and interfacial diffusion, will be discussed. At the same time, the improvement of interfacial properties will be given, including stirring and additives.

9. Industrial alkylation process and safety

9.1 Industrial alkylation process

9.2 Industrial alkylation safety

9.3 Industrial operation challenges
This chapter will introduce the current industrial alkylation process based on sulfuric acid, HF, ionic liquids, and solid acid. The capacity and operation process of the alkylation will be listed.

10. Acknowledgements

11. References

Weizhen Sun

Dr Sun has graduated from East China University of Science and Technology (ECUST), majoring in chemical technology, and obtained the master and doctorate degrees in chemical engineering from ECUST in 2004 and 2009. He was engaged for one year in molecular simulation in the group of Professor Berend Smit, University of California at Berkeley. His main research interests include chemical reaction engineering, multiscale simulation, and applications of nanomaterials in energy and medicine. He uses theory and methods to study reaction kinetics of complex systems, simulation optimization and design of large-scale industrial reactors, especially focusing on the surface and interface properties and reaction-transfer coupling relationships of heterogeneous reaction processes at the molecular scale by means of molecular simulation methods.

Affiliations and expertise

East China University of Science and Technology, Shanghai, China

Weizhong Zheng

Dr Weizhong has graduated from East China University of Science and Technology with bachelor and doctorate degree, In 2014 and 2020, respectively. In 2018, he went to Stanford University for joint training. He mainly engaged in the research on the identification and strengthening of interface properties of heterogeneous systems. He is good at combining molecular dynamics simulation, in-situ characterization, machine learning and experimental methods to study multi-scale interface microstructure and mass transfer characteristics, guiding the rational design of green catalysts/auxiliaries and green process development. Currently he published more than 30 papers including J. Am. Chem. Soc., AIChE J., Chem. Eng. Sci. He won the China Petroleum and Chemical Industry Federation CPCIF-Clariant Sustainable Development Youth Innovation Award.

Affiliations and expertise

East China University of Science and Technology, Shanghai, China

Ling Zhao

Dr Ling has graduated from East China University of Science and Technology (ECUST), majoring in chemical technology, and obtained the master and doctorate degrees in chemical engineering from ECUST in 1993 and 1996. From 2002 to 2003, She was awarded the KC Wong Fellowship of the Royal Society of England and worked as a postdoctoral fellow at the Department of Chemical Engineering, University of Birmingham. She is currently the deputy director of the ninth council of Shanghai Society of Chemistry and Chemical Engineering and the Professional Committee of Science and Engineering. Her main research includes the supercritical fluid-assisted polymerization and polymer processing, and heterogeneous reaction and transfer process intensification, such as polyester, nylon, polycarbonate, acrylonitrile polymerization, aromatic hydrocarbons, liquid-phase oxidation, and sulfuric acid alkylation. She participated in National Science and Technology Progress Second Prize and obtained the Provincial and Ministerial Science and Technology Progress Prize for 4 times.

Affiliations and expertise

Deputy director of the ninth council, Shanghai Society of Chemistry and Chemical Engineering and the Professional Committee of Science and Engineering

Jinzhu Li

Dr Li has graduated from Fushun Petroleum Institute with the bachelor's degree and East China University of Science and Technology with the master's degree in Chemical engineering. He was engaged in the operation and management of petroleum refining plant for 24 years, responsible for the construction and operation management of 500,000 tons/year liquefied gas separation plant, and the expansion construction and operation management of MTBE plant from 20,000 tons/year to 40,000 tons/year, then to 100,000 tons/year, and finally to 150,000 tons/year. He was also responsible for the operation and technical management of the gasoline-diesel hydrogenation unit and the wax oil hydrocracking unit, as well as the technical comparison, construction, start-up, shutdown and operation management of the 300,000 tons/year sulfuric acid alkylation and the supporting acid regeneration unit. He has rich experience in oil refinery operation safety and technical management.

Affiliations and expertise

East China University of Science and Technology, Shanghai, China