Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation

Abstract

The separation of aqueous acetonitrile solution by pressure swing distillation (PSD) was simulated and optimized through Aspen Plus software. The distillation sequence of the low pressure column (LPC) and high pressure column (HPC) was determined with a phase diagram. The pressures of the two columns were set to 1 and 4 atm, respectively. Total annual cost (TAC) was considered as the objective function, and design variables, such as the tray number, the reflux ratio, and the feeding position, were optimized. The optimum process parameters were obtained. For the reduction of energy consumption, the PSD with full-heat integration was designed. The TAC of this method is lower by 32.39% of that of the PSD without heat integration. Therefore, it is more economical to separate acetonitrile and water mixture by PSD with full-heat integration, which provides technical support for the separation design of such azeotropes.

[Retracted] Optimization Analysis of Power Coal‐Blending Model and Its Control System Based on Intelligent Sensor Network and Genetic Algorithm

“…The application of precise power coal blending in ports at home and abroad has had successful experience [7]. In 1994, the Netherlands established a power coal-blending system with silo power coal blending as the core, with an annual power coal-blending capacity of 10 million tons.…”

Special Issue on “Advances in Condition Monitoring, Optimization and Control for Complex Industrial Processes”

“…In the work by Li et al, Aspen Plus software was used to simulate and optimize the separation of the aqueous acetonitrile solution by pressure swing distillation [25]. The total annual cost was used as the objective function, and the tray number, reflux ratio, and feeding position were the design variables to be optimized.…”

A simple and low‐energy strategy for the separation of water and acetonitrile

“…As acetonitrile and water can form a mutually soluble binary azeotropic system (16% water, 84% acetonitrile, v/v), it is difficult to achieve complete separation for acetonitrile and water in acetonitrile-water mixed solution by common distillation methods [4]. Pervaporation is a membrane separation technology with the advantages of environmental protection and small footprint, which has been widely used in low-concentration acetonitrile separation [5][6][7][8].…”

“…4 Cl, K 2 CO 3 , Na 2 CO 3 , Li 2 SO 4 , Na 2 SO 4 , and MgSO 4 ) were all obtained from National Drug Chemical Reagents Co., Ltd. Methanol and acetonitrile (HPLC grade) were purchased from Tiandi Co.,…”