Extractive Distillation Approach to the Separation of Styrene from Pyrolysis Gasoline Feedstock Coupled with Deep Desulfurization-Reference-Cited by-同舟云学术

Extractive Distillation Approach to the Separation of Styrene from Pyrolysis Gasoline Feedstock Coupled with Deep Desulfurization

Published:2023-06-01 Issue:6 Volume:10 Page:341
ISSN:2297-8739
Container-title:Separations
language:en
Short-container-title:Separations

Author:

Guo Guanchu¹,Liu Chuanlei¹^ORCID,Chen Yuxiang¹,Zhao Qiyue¹,Gao Weikang¹,Wang Hao¹,Yang Fengjing¹,Shen Benxian¹²,Wu Di³⁴⁵⁶^ORCID,Sun Hui¹²^ORCID

Affiliation:

1. School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

2. International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

3. Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, WA 99163, USA

4. The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99163, USA

5. Materials Science and Engineering, Washington State University, Pullman, WA 99163, USA

6. Department of Chemistry, Washington State University, Pullman, WA 99163, USA

Abstract

The separation of mixtures with close boiling points is a critical task in the petrochemical industry, and one such mixture that requires separation is o-xylene/styrene. The STED process is used to separate o-xylene/styrene, which contains a certain amount of organic sulfur in the product due to the limitations of the process. In this study, the process underwent enhancements to attain the effective separation of styrene and accomplish deep desulfurization. A mixture of sulfolane (SUL) and N-methylpyrrolidone (NMP) was selected as the extraction solvent after calculating the UNIFAC group contributions. An orthogonal experiment was conducted to investigate the effects of the solvent/oil ratio, reflux ratio, water addition rate, and solvent ratio on the product. The correspondence between each factor and the indexes examined was determined, enabling the optimization and prediction of the styrene product quality. The final optimized conditions for the extractive distillation column are as follows: solvent/oil ratio of 7, reflux ratio of 4.5, water addition rate of 6000 kg/h, and a solvent ratio of 9:1. Under optimal conditions, the purity of the product was observed to be greater than that of the original process and the sulfur content of the product can be reduced to lower than 10 ppm at the cost of an increase of 12.31% in energy consumption.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

Subject

Filtration and Separation,Analytical Chemistry

Link

https://www.mdpi.com/2297-8739/10/6/341/pdf

Reference49 articles.

1. Decarbonizing the chemical industry: A systematic review of sociotechnical systems, technological innovations, and policy options;Chung;Energy Res. Soc. Sci.,2023

2. Randall, G.A. (1963). Method of Separating Ethylbenzene from Styrene by Low Pressure Drop Distillation. (U.S. Patent 3084108A).

3. Van Tassell, H.M. (1968). Separation of Ethylbenzene and Styrene by Low Pressure, High Temperature Distillation. (U.S. Patent 3398063A).

4. Welch, V.A. (2001). Cascade Reboiling of Ethylbenzene/Styrene Columns. (U.S. Patent 6171449B1).

5. Production of Styrene from Dehydrogenation of Ethylbenzene;Gupta;Chem. Eng. Technol.,2022