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| 1 | 不同热集成变压精馏工艺分离乙酸乙酯/正己烷共沸物的优化与控制显示文摘基于变压精馏分离乙酸乙酯/正己烷共沸体系两塔的温差,利用Aspen Plus软件,以年度总成本最小为目标函数,对部分及完全热集成变压精馏工艺进行了稳态模拟及优化。在此基础上,利用Aspen Dynamics软件开发了多种控制结构,通过引入不同进料流量及组成的扰动测试控制结构的有效性。结果表明,完全热集成变压精馏工艺比部分热集成变压精馏工艺的经济性稍好。动态响应结果表明,部分热集成变压精馏工艺的压力-补偿温度控制结构可有效处理不同程度的干扰,能有效提高控制结构对干扰的响应速度,缩短达到新稳态的时间,保证乙酸乙酯和正己烷产品纯度在99.9wt%之上;而完全热集成变压精馏工艺的组分-温度串级控制结构仅能处理较小的组分和流量干扰,实现稳健控制,无法处理较大的干扰。综合比较两种工艺的经济性和可控性,认为部分热集成变压精馏工艺分离乙酸乙酯/正己烷共沸体系优于完全热集成变压精馏工艺。 | 吕利平 李航 何树华 徐建华 李兵 | 2019 | 过程工程学报2019，19，6： | 4 |
| 2 | 乙二醇和1,2-丁二醇二元气液平衡体系的研究及模型预测显示文摘为了研究乙二醇-1,2-丁二醇在不同真空度下共沸组成的变化规律及差压精馏分离的可行性,使用改进的Othmer气液平衡釜测定了1~100 kPa下乙二醇-1,2-丁二醇二元体系的气液平衡数据,均通过了热力学一致性检验。分别采用Wilson、NRTL和UNIQUAC方程对不同压力下的气液平衡数据进行整体关联,结果表明,UNIQUAC方程计算精度更高,可适用于1~100kPa下的相平衡计算。采用UNIQUAC方程计算了不同压力下乙二醇-1,2-丁二醇的共沸组成,共沸组成中乙二醇的摩尔分数随压力的降低呈非线性增加。操作压力由100降低至1kPa时,共沸组成中乙二醇的摩尔分数的变化可达到12%,推断乙二醇-1,2-丁二醇具有差压精馏分离的可行性。 | 武涵 陈学青 李蓓 张超 刘秀伍 杨敬辉 张继军 | 2023 | 高校化学工程学报2023，37，2： | 1 |
| 3 | A review of conventional and renewable biodiesel production显示文摘The need for sustainable fuels has resulted in the production of renewables from a wide range of sources,in particular organic fats and oils.The use of biofuel is becoming more widespread as a result of environmental and economic considerations.Several efforts have been made to substitute fossil fuels with green fuels.Ester molecules extracted from processed animal fats and organic plant materials are considered alternatives for the use in modern engine technologies.Two different methods have been adopted for converting esters in vegetable oils/animal fats into compounds consistent with petroleum products,namely the transesterification and the hydro-processing of ester bonds for the production of biodiesel.This review paper primarily focuses on conventional and renewable biodiesel feedstocks,the catalyst used and reaction kinetics of the production process. | P.Vignesh A.R.Pradeep Kumar N.Shankar Ganesh V.Jayaseelan K.Sudhakar | 2021 | Chinese Journal of Chemical Engineering2021，34，12： | 0 |
| 4 | Comprehensive analysis on the economy and energy demand of pressure-swing distillation and pervaporation for separating waste liquid containing multiple components显示文摘A large amount of waste liquids containing methanol/acetone/water mixtures are produced in the synthesis of methyl methacrylate(MMA).Under the advocacy of green chemical industry,it is urgent to develop an efficient,economic and energy-saving mixture separation process.Through thermodynamic azeotropic behavior and pressure sensitivity analysis,pressure-swing distillation was determined and the optimal separation pressure of each column in the process was obtained.Due to the composition of waste liquids produced were quite different in MMA production,the pressure-swing distillation separation process was designed to fully achieve the accurate waste liquids treatment.Taking the total annual cost(TAC)as the target,the sequential iteration method was used to optimize the process,and the impact of composition on economy was compared.In order to further realize the energy-saving of the separation process,the pervaporation membrane module was introduced to pretreat the waste liquid in the pressure-swing distillation.The results showed that the TAC of the coupling process was 46% higher than that of the pressure-swing distillation process,and the thermodynamic efficiency was 30% higher.This study provides waste liquid treatment technology for enterprises and analyzes its economic and energy efficiency,which has reference significance for the development of coupled separation technology. | Hongru Zhang Yusen Chen Haiyang Cheng Yangyang Wang Peizhe Cui Shiqing Zheng Zhaoyou Zhu Yinglong Wang Yanyue Lu Jun Gao | 2023 | Chinese Journal of Chemical Engineering2023，63，11： | 0 |
| 5 | 环己烷-乙酸乙酯共沸体系分离模拟与优化研究显示文摘采用变压精馏、萃取精馏、萃取精馏间壁塔3种分离方式对环己烷-乙酸乙酯共沸体系分离的有效性和经济性进行研究。使用Aspen Plus对3种分离工艺进行建模与模拟,以年度总费用(TAC)最小为目标函数,对设备参数和工艺参数进行优化,得到了3种工艺的优化参数。结果表明,3种工艺都能有效实现环己烷和乙酸乙酯的分离,与变压精馏相比,萃取精馏同时降低了设备费和操作费,可使TAC降低33.00%。萃取精馏间壁塔可在萃取精馏的基础上,使TAC降低14.65%,效果最佳。 | 赵昕宇 杜增智 王健红 | 2022 | 化工生产与技术2022，28，1： | 0 |
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