烯烃齐聚化工流程熵产率分析与优化  

Entropy generation rate analysis and optimization of olefin oligomerization chemical process

作　　者：夏少军[1] 于亚杰 赵明 XIA Shao-jun;YU Ya-jie;ZHAO Ming(College of Power Engineering,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学动力工程学院,武汉430033

出　　处：《海军工程大学学报》2022年第5期27-32,共6页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51976235,51606218);湖北省自然科学基金资助项目(2018CFB708)。

摘　　要：烯烃齐聚反应是一种可将低碳烯烃转化为高碳燃油的反应,在舰船燃油保障领域有着重要意义。以有限时间热力学理论为基础,对包含混合器、压缩机、换热器与反应器的烯烃齐聚化工流程进行建模,在给定压缩机效率、换热器与反应器热源温度分布和癸烯(C_(10)H_(20))产率的条件下,以流程熵产率最小为优化目标,以反应器进口压力、混合器入口组分及总摩尔流率为自变量进行优化,并将优化结果与参考化工流程和反应器熵产率最小对应流程进行比较。结果表明:通过优化使流程熵产率下降了44.41%;在优化范围内,减小混合器入口总摩尔流率与反应器进口压力可降低流程熵产率;流程最小熵产率相较于反应器熵产率最小对应流程的熵产率减小了49.29%。Olefin oligomerization is a reaction that converts low-carbon olefins into high-carbon hydrocarbon fuel, which is of great significance in the field of ship fuel support. Based on the theory of finite-time thermodynamics, the olefin oligomerization chemical process model including mixer, compressor, heat exchanger and reactor was established. Under the conditions of given compressor efficiency, external heat source temperature distributions of the heat exchanger and the reactor and decene(C_(10)H_(20)) yield, the optimization objective was to minimize the total entropy generation rate of the chemical process. The process was optimized by taking the inlet pressure of the reactor, the reac-tant composition and the total inlet molar flow rate of the mixer as the independent variables. The obtained results were also compared with those for the reference process and the corresponding process with the minimum entropy generation rate of the reactor. The results show that the entropy generation rate is reduced by 44.41%;the entropy generation rate of the process can be reduced by reducing both the outlet pressure of the compressor and the total inlet molar flow rate of the mixer within the scope of optimization;the minimum entropy generation rate of the process is reduced by 49.29% compared to that for the process with the minimum entropy generation rate of the reactor.

关 键 词：有限时间热力学 烯烃齐聚 化工流程 熵产率最小化 

分 类 号：TK123[动力工程及工程热物理—工程热物理]