Systematic design of energy efficient extractive distillation column for azeotrope mixture

In this contribution, a different pressure thermally coupled extractive distillation process has been applied on the separation of propylene and propane with aqueous acetonitrile (ACN) solution as entrainer. The novel distillation pro-cess integration is the combination of different pressure thermally coupled distillation (DPTCD) and extractive distillation (ED). Both the new process and the conventional process have been simulated in Aspen Plus. Sensitivity analysis has been conducted to select an appropriate compression ratio and other operating parameters based on the priority that the propylene product purity is 99.2 wt % and less energy consumption. The influence of the proposed distillation column on energetic and economic aspects is evaluated through intensive comparison against the conventional stand-alone column, and better performance is achieved with up to 46.02% energy saving and close to 9.7% saving in total annual cost (TAC).

Download Full-text

Energy efficient extractive distillation process assisted with heat pump and heat integration to separate acetonitrile /1,4-dioxane/water

Process Safety and Environmental Protection ◽

10.1016/j.psep.2021.09.042 ◽

2021 ◽

Author(s):

Yinggui Xu ◽

Jinlong Li ◽

Qing Ye ◽

Yudong Li

Keyword(s):

Heat Pump ◽

Energy Efficient ◽

Extractive Distillation ◽

Heat Integration ◽

Distillation Process

Download Full-text

Systematic design of separation process for bioethanol production from corn stover

BMC Chemical Engineering ◽

10.1186/s42480-020-00033-1 ◽

2020 ◽

Vol 2 (1) ◽

Author(s):

Suksun Amornraksa ◽

Ittipat Subsaipin ◽

Lida Simasatitkul ◽

Suttichai Assabumrungrat

Keyword(s):

Energy Consumption ◽

Corn Stover ◽

Process Design ◽

Extractive Distillation ◽

Separation Process ◽

Production Costs ◽

Bioethanol Production ◽

Systematic Design ◽

Separation Processes ◽

Process Economics

Abstract Separation process is very crucial in bioethanol production as it consumes the highest energy in the process. Unlike other works, this research systematically designed a suitable separation process for bioethanol production from corn stover by using thermodynamic insight. Two separation processes, i.e., extractive distillation (case 2) and pervaporation (case 3), were developed and compared with conventional molecular sieve (case 1). Process design and simulation were done by using Aspen Plus program. The process evaluation was done not only in terms of energy consumption and process economics but also in terms of environmental impacts. It was revealed that pervaporation is the best process in all aspects. Its energy consumption and carbon footprint are 60.8 and 68.34% lower than case 1, respectively. Its capital and production costs are also the lowest, 37.0 and 9.88% lower than case 1.

Download Full-text

Energy-efficient heterogeneous extractive distillation system for the separation of close-boiling cyclohexane/cyclohexene mixture

Journal of the Taiwan Institute of Chemical Engineers ◽

10.1016/j.jtice.2018.03.042 ◽

2018 ◽

Vol 87 ◽

pp. 26-35 ◽

Cited By ~ 11

Author(s):

Chun-Cheng Yi ◽

Wen-Chi Huang ◽

I-Lung Chien

Keyword(s):

Energy Efficient ◽

Extractive Distillation ◽

Distillation System

Download Full-text

Synthesis of High-Purity Methylal by Reactive and Extractive Distillation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.723.629 ◽

2015 ◽

Vol 723 ◽

pp. 629-632

Author(s):

Ji Quan Liu ◽

Peng Wang

Keyword(s):

Cation Exchange ◽

High Purity ◽

Distillation Column ◽

Exchange Resin ◽

Cation Exchange Resin ◽

Extractive Distillation ◽

Molar Ratio ◽

Reflux Ratio ◽

Optimum Conditions ◽

Resin Catalyst

The process for production high-purity methylal, which used methanol and formalin in the presence of cation-exchange resin catalyst, was investigated in the reactive and extractive distillation column. Effect of feed mole ratio of formaldehyde in the extracting and reacting section, molar ratio of methanol and formaldehyde, reflux ratio on the content of methylal in the distillate were investigated. The results show that the purity of methylal can reach 99.1% under the optimum conditions.

Download Full-text