Article
Engineering, Chemical
Fang Bai, Chao Hua, Yongzhi Bai, Mengying Ma
Summary: This study optimized the HBA and HBD ratio and molar concentration of deep eutectic solvents (DES) for use in cyclohexane and benzene extractive distillation. The results showed that a 1:2 ratio and 0.1 molar concentration were most effective, with the NRTL model providing the most accurate predictions. Stronger hydrogen bond and pi-pi bond interactions were observed with a 1:2 HBA and HBD ratio, breaking the azeotrope.
Article
Engineering, Chemical
Yin-Rui Zhang, Tsai-Wei Wu, I-Lung Chien
Summary: Thermodynamic analysis was conducted to screen feasible ternary systems with water, resulting in TBA/EtOH/water, THF/EtOH/water, and ACN/IPA/water mixtures suitable for separation using a dehydrating agent. TCRED and DCRED process configurations were developed to significantly reduce capital cost and energy consumption while achieving energy savings.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jing Li, Qiang Wang, Luoyang Tian, Zhansheng Li, Yanrui Li, Yanbiao Hu, Biao Liu
Summary: The thermodynamic properties of the N-octylpyridinium bromide ionic liquid were studied, revealing its interaction and solubility with solvents. The results showed that it had good separation potential and could effectively separate benzene from certain mixtures. It also demonstrated excellent recyclability when used as an entrainer in extractive distillation, making it a promising alternative to organic solvent entrainers and aligning with the concept of green development.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Chemical
Chao Guo, Fuqiang Wang, Jiafu Xing, Peizhe Cui
Summary: The separation of DMC/methanol/water azeotropic mixtures has been studied using organic solvents and ionic liquids. The interaction mechanisms between the components and the entrainers were explored, and the best separation sequence and process were determined based on energy and economic comparisons. The results showed that the [BMIM][Cl]-based direct extractive distillation process was the most efficient and cost-effective method.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Baoming Shan, Yanshuo Pang, Qi Zheng, Qilei Xu, Yinglong Wang, Zhaoyou Zhu, Fangkun Zhang
Summary: In this study, a dynamic control scheme using an improved PID-ANFIS system is proposed for real-time measurement and control of product composition in extractive distillation. The ANFIS algorithm is optimized by genetic algorithm and particle swarm optimisation to enhance its performance. The control scheme of PSO-optimized PID-ANFIS demonstrates superior dynamic performance, faster response time, and smaller transient values compared to other control schemes.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
Yuhao Zhang, Feng Chen, Liang Zhao, Jinsen Gao, Chunming Xu, Qingfei Meng, Xiangqi Liu
Summary: The extractive distillation process is increasingly used for desulfurization of FCC naphtha due to its excellent octane protection, but the complexity and variability of feedstock composition require simulation using the UNIFAC model to predict and adjust operating conditions.
Article
Engineering, Chemical
Tsai-Wei Wu, I-Lung Chien
Summary: A novel control strategy is developed in this work for an intensified hybrid reactive-extractive distillation system using only temperature measurements, addressing the challenging issues in the design configuration. By using temperature and temperature-difference control loops as surrogates for quality control loops, the best control structures are demonstrated to be resilient to measurable throughput disturbances and adaptable to different system characteristics.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ming Liu, Ran Cen, Jisen Li, Qing Li, Zhu Tao, Xin Xiao, Lyle Isaacs
Summary: In this study, solid double-cavity host ns-Q[10] was found to function as an efficient adsorption separator for the removal of pyridine from benzene and toluene, achieving high purity of the separated compounds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Jun Yan, Haiyu Sun, Qilin Wang, Lu Lu, Biao Zhang, Zhonggang Wang, Shengwei Guo, Fenglan Han
Summary: This study synthesized three covalent triazine frameworks (CTFs) with cycloaliphatic moieties through Friedel-Crafts reactions. These CTFs demonstrated excellent adsorption performance and efficient separation of benzene and cyclohexane vapor mixtures.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Engineering, Chemical
Hao Lyu, Shihan Li, Chengtian Cui, Xingong Yu, Jinsheng Sun
Summary: The non-sharp side-stream extractive distillation (SSED) partially collects intermediate components through the side stream, making it preferred in some high boiling-point solvent extractive distillation (ED) systems. The study introduces an adaptive superstructure-differential evolution (DE) method to optimize sequences and parameters simultaneously. The improved method performs better in optimization with less computational cost and better solutions than conventional approaches.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Eduardo Sanchez-Ramirez, Youhe Zhang, Ao Yang, Zong Yang Kong, Juan Gabriel Segovia-Hernandez, Jaka Sunarso
Summary: This study integrates green sustainability metrics into extractive distillation through multi-objective optimization, considering economic, environmental, and safety indicators simultaneously. The results show significant sustainability improvements compared to their base cases, with three column extractive distillation outperforming four column extractive distillation in energy, economic, environmental, and safety performance.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Review
Engineering, Chemical
Min Li, Yue Cui, Xiaojing Shi, Zhishan Zhang, Xiaoxiao Zhao, Xiuyu Zhu, Jun Gao
Summary: This article investigates the performances of different extractive distillation processes with a dividing wall column for separating benzene-isopropanol-water ternary mixtures, and determines that the EDWC-S process is the most cost-effective and carbon-efficient solution.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Thermodynamics
Miguel Ayuso, Antonio Ovejero-Perez, Noemi Delgado-Mellado, Pablo Navarro, Marcos Larriba, Julian Garcia, Francisco Rodriguez
Summary: This study analyzed the suitability of four ionic liquids for separating cyclohexane and cyclohexene mixtures, with tetrathiocyanatocobaltate-based ionic liquids showing the highest relative volatilities and bis(trifluoromethylsulfonyl)imide-based ionic liquids being the most promising in terms of viscosity and thermal stability. The Non-Random Two Liquids (NRTL) model accurately described the experimental vapor-liquid equilibria data for the systems studied.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
Article
Thermodynamics
Yicang Guo, Fengming Shi, Qipeng Shu, Xiaoyong Yue, Cheng Wang, Lei Tao, Jinlong Li
Summary: This study experimentally determined the liquid-liquid equilibrium data for several ionic liquids and their mixtures, showing improved separation performance compared to traditional sulfolane solvent. The selected ionic liquids exhibited higher molar distribution coefficient or selectivity, suggesting they could be potential substitutes for sulfolane in industrial applications.
FLUID PHASE EQUILIBRIA
(2021)
Article
Engineering, Chemical
Mohammed Awwalu Usman, Olumide Kayode Fagoroye, Toluwalase Olufunmilayo Ajayi, Abiola John Kehinde
Summary: In this study, mixed deep eutectic solvents were synthesized and tested for their extraction efficiency in separating benzene from n-hexane. The results showed that the mixed solvent of glyceline and ethaline in a 80:20 volume ratio exhibited the best performance with higher distribution coefficient and selectivity, and superior separation efficiency compared to other mixed solvents. Additionally, the mixed deep eutectic solvents had properties lying between those of the constituent solvents, confirming their potential for improved extraction processes.
APPLIED PETROCHEMICAL RESEARCH
(2021)
