Separation of acetonitrile/methanol/benzene ternary azeotrope via triple column pressure-swing distillation
Separation of acetonitrile/methanol/benzene ternary azeotrope via triple column pressure-swing distillation
复制标题
三塔变压精馏分离乙腈/甲醇/苯三元共沸物
DOI：
10.1016/j.seppur.2016.06.009
复制
发表时间：
2016-09
影响因子：
8.6
通讯作者：
Yinglong Wang
中科院分区：
文献类型：
--
作者：
Dongfang Xu;Xingzhen Liu;Zhen Zhang;Yinglong Wang
乙腈/甲醇/苯混合物形成一种以上不同的共沸物，其三角形图显示了常压下的几个蒸馏边界。提出了三塔变压精馏（TCPSD）分离该复杂三元体系的方法。利用残留曲线图验证了该工艺的可行性，并在Aspen Plus上进行了严格的稳态模拟。以年总成本最小为目标，利用变压优化软件采用序贯迭代优化方法对多个运行参数进行了优化，并比较了TCPSD在4种不同分离配置下的经济性。结果表明，在TCPSD分离乙腈/甲醇/苯共沸混合物的全局优化中，A-M-B分离配置是最优的柱序。TCPSD可以引起各领域研究人员的兴趣，并可以帮助工程师选择最佳的分离工艺。
Acetonitrile/methanol/benzene mixture forms more than one different azeotropes and its triangular diagram presents several distillation boundaries at atmospheric pressure. A process named as triple column pressure-swing distillation (TCPSD) was proposed to separate this complex ternary system. The feasibility of the process was confirmed using residue curve maps and rigorous steady-state simulations were implemented on Aspen Plus. On basis of minimum total annual cost, several operating parameters were optimized by pressure-swing optimization software using the sequential iterative optimization procedure and the economics of TCPSD were compared with four different separation configurations. The results demonstrated that the A-M-B separation configuration was the most optimal column sequence in global optimization to separate acetonitrile/methanol/benzene azeotropic mixture using TCPSD. TCPSD may arouse the interest of researchers in various fields and can assist engineers to select the optimal separating process.
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