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Chinese Journal of Chemical Engineering 2024年第5期69卷 63-71页

作者： Hui Tan Xiaodong Hong zuwei liao Jingyuan Sun Yao Yang Jingdai Wang Yongrong Yang State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311215China

Heat integration is important for energy-saving in the process *** is linked to the persistently challenging task of optimal design of heat exchanger networks(HEN).Due to the inherent highly nonconvex nonlinear and combinatorial nature of the HEN problem,it is not easy to find solutions of high quality for large-scale *** reinforcement learning(RL)method,which learns strategies through ongoing exploration and exploitation,reveals advantages in such ***,due to the complexity of the HEN design problem,the RL method for HEN should be dedicated and designed.A hybrid strategy combining RL with mathematical programming is proposed to take better advantage of both *** insightful state representation of the HEN structure as well as a customized reward function is introduced.A Q-learning algorithm is applied to update the HEN structure using theε-greedy *** results are obtained from three literature cases of different scales.

关键词： Heat exchanger network Reinforcement learning Mathematical programming Process design

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基于自适应变步长同伦法的循环流程收敛算法

化工学报 2024年第7期75卷 2604-2612页

作者：李洪瑞黄纯西洪小东廖祖维王靖岱阳永荣化学工程联合国家重点实验室浙江大学浙江杭州310027 功能材料智能设计与制造浙江省工程研究中心浙江大学杭州国际科创中心浙江杭州311215

包含循环流股的流程模拟面临初值难给定和传统算法收敛困难的问题。针对该问题提出了自适应变步长同伦算法,通过自适应调整同伦参数步长处理中间过程收敛失败的情形,提高收敛效率,并采用回溯线搜索法将迭代变量限制在定义域内,以提升算... 详细信息

包含循环流股的流程模拟面临初值难给定和传统算法收敛困难的问题。针对该问题提出了自适应变步长同伦算法,通过自适应调整同伦参数步长处理中间过程收敛失败的情形,提高收敛效率,并采用回溯线搜索法将迭代变量限制在定义域内,以提升算法的鲁棒性。构建了基于直接迭代法、Wegstein法、Broyden法和牛顿法的同伦算法,分析了同伦参数和辅助函数的影响。以淤浆法工艺生产高密度聚乙烯作为案例,模拟结果表明同伦算法可以提高模型在不同工况下的收敛性。商业流程模型软件Aspen Plus内置的求解器最高仅在21%测试工况下可以获得可行解,而同伦算法收敛案例占比可达88%。

关键词：过程系统算法化学过程模拟同伦法

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基于人工神经网络的工质基础物性预测

石油炼制与化工 2024年第1期55卷 180-188页

作者：林美金董轩洪小东廖祖维孙婧元杨遥王靖岱阳永荣浙江大学化学工程与生物工程学院杭州310030 浙江大学杭州国际科创中心

烃类及卤代烃是制冷及余热发电等热力学循环系统潜在的理想工质,但其数量繁多且多数物性参数未知,建立准确的物性预测模型对新型工质的开发至关重要。从多个公开数据库中收集了2500多种烃类及卤代烃分子(含C,H,F,Cl)的基础物性参数,包... 详细信息

烃类及卤代烃是制冷及余热发电等热力学循环系统潜在的理想工质,但其数量繁多且多数物性参数未知,建立准确的物性预测模型对新型工质的开发至关重要。从多个公开数据库中收集了2500多种烃类及卤代烃分子(含C,H,F,Cl)的基础物性参数,包括正常沸点(T_(b))、临界温度(T_(c))、临界压力(p_(c))、偏心因子(ω),构建了一个工质物性数据库;进一步,通过改进基团贡献-人工神经网络(GC-ANN)的方法,模型的输入参数除基团频率外,还加入相对分子质量、T_(b)、约化维纳指数,建立了预测烃类及卤代烃分子T_(b),T_(c),p_(c),ω的神经网络模型,所开发模型的预测误差小于传统的GC-ANN的误差。

关键词：新型工质物性预测基团贡献法 BP神经网络

Scale-up and thermal stability analysis of fluidized bed reactors for ethylene polymerization

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Chinese Journal of Chemical Engineering 2023年第10期62卷 281-290页

作者： Xiaoqiang Fan Jingyuan Sun Jingdai Wang Zhengliang Huang zuwei liao Guodong Han Yongrong Yang Ningbo Research Institute Zhejiang UniversityNingbo 315100China State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology Hangzhou 310027China Sinopec Tianjin Company Tianjin 300271China

A set of hydrodynamic similarity laws is applied to the scale-up of ethylene polymerization fluidized bed reactors(FBRs)under the condensed mode *** thermal stability of open-loop controlled FBRs is investigated by the homotopy continuation *** the Hopf bifurcation point is selected as an index of the thermal stability *** simulation results show the similarity in state variables,operation parameters,the space-time yield(STY),and the thermal stability of FBRs with different ***,the thermal stability behaviors and similarity of the closed-loop controlled FBRs with different scales are *** observed similar trend of Hopf bifurcation curves reveals the similarity in the thermal stability of closed-loop controlled FBRs with different scaling *** general,the results of the thermal stability similarity confirm that the hydrodynamics scaling laws proposed in the work are applicable to the scale-up of FBRs under the condensed mode operation.

关键词： Stability Scale-up Polymerization Bifurcation theory Fluidized bed

Acidity Modification of ZSM-5 for Methane Conversion in Co-feeding Method with MTA Reaction

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Chemical Research in Chinese Universities 2022年第4期38卷 1012-1017页

作者： YU Yue XI Zhixiang ZHOU Bingjie JIANG Binbo liao zuwei YANG Yao WANG Jingdai HUANG Zhengliang SUN Jingyuan YANG Yongrong Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027P.R.China

Acidity plays a vital role in methane conversion by co-feeding method,which is one of the best strategies to improve the utilization and gentle the reaction conditions of *** this work,Zn,Ni,Mo,La,Ga,Fe and Co-impregnated ZSM-5 zeolites have been prepared with the same substitutions to variate the acidities and tested in co-aromatization of methanol with *** is demonstrated that the new medium-strong acid sites formed by metal and strong acid sites are the key role to activate methane in ***-modified ZSM-5 catalyst is preferred to exhibit the best methane conversion of 12%,whose aromatic selectivity increases from 27.2%to 52.2%compared with that of ***,the addition of methane further improves the production of high-valued aromatics compared with methanol to aromatics(MTA)reaction.

关键词： Methane Methanol to aromatics(MTA) Co-reaction Acid site

Modelling and simulation of two-bed PSA process for separating H2 from methane steam reforming

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Chinese Journal of Chemical Engineering 2019年第8期27卷 1870-1878页

作者： Huiru Li zuwei liao Jingyuan Sun Binbo Jiang Jingdai Wang Yongrong Yang Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027 China State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027 China

Methane steam reforming is the main hydrogen production method in the industry. The product of methane steam reforming contains H2, CH4, CO and CO2 and is then purified by pressure swing adsorption(PSA) technology. In this study, a layered two-bed PSA process was designed theoretically to purify H2 from methane steam reforming off gas. The effects of adsorption pressure, adsorption time and purgeto-feed ratio(P/F ratio) on process performance were investigated to design a PSA process with more than99.95% purity and 80% recovery. Since the feed composition of the PSA process changes with the upstream process, the effect of the feed composition on the process performance was discussed as *** result showed that the increase of CH4 concentration, which was the weakest adsorbate, would have a negative impact on product purity.

关键词： Hydrogen Adsorption Purity Recovery Feed composition

Improving Refinery Profits via Fine Management of Hydrogen Networks

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China Petroleum Processing & Petrochemical Technology 2010年第2期12卷 57-62页

作者： liao zuwei Zhang Yi Rong Gang Yang Yongrong State Key Laboratory of lndustrial Control Technology Zhejiang University Hangzhou 310027 State Key Laboratory of Chemical Engineering Zhejiang University

氢网络管理对 *** 重要系统的管理技术被开发了改进精炼厂氢 *** 的效率，所有对待在处理的氢网络费用和油之间的氢网络 *** 折衷的存在方法联网利益没在氢网络管理 yet.A 小说敏感分析计划被探索被介绍拿把网络处理成处理统一哪个是 se... 详细信息

氢网络管理对 *** 重要系统的管理技术被开发了改进精炼厂氢 *** 的效率，所有对待在处理的氢网络费用和油之间的氢网络 *** 折衷的存在方法联网利益没在氢网络管理 yet.A 小说敏感分析计划被探索被介绍拿把网络处理成处理统一哪个是 sensi 的 ***

关键词：网络管理炼油厂精细化管理氢气敏感性分析石油加工利润最佳操作条件

Recent Progresses on Optimal Design of Heat Integrated Water Allocation Network

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China Petroleum Processing & Petrochemical Technology 2021年第3期23卷 69-75页

作者： Zhang Chijin Ren Congjing liao zuwei Sun Jingyuan Wang Jingdai Yang Yongrong State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027 Ningbo Research Institute Zhejiang UniversityNingbo 315100

Energy integration and mass integration are important approaches to achieve energy saving and emission reduction in the process ***,the methods can be classified into two groups,viz.:conceptual design methods and mathematical programming *** former includes mainly graphical methods based on pinch technology that is operated easily.A feasible solution can be quickly *** design methods are sequential in nature including two steps,namely:targeting and *** latter is based on superstructure optimization,and corresponding algorithm is adopted to solve the *** trade-offs and connections among the entire network can be established and *** factors can be considered and optimized simultaneously by mathematical programming *** paper describes the synthesis of heat integrated water allocation networks(HIWAN)based on both conceptual design methods and mathematical programming methods *** addition,the characteristics and shortcomings of the existing research methods are summarized,and the future research direction is prospected.

关键词： heat integrated water allocation network conceptual design mathematical programming

Pore plugging effects on the performance of ZSM-5 catalyst in MTP reaction using a discrete model

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Chinese Journal of Chemical Engineering 2021年第4期34卷 253-263页

作者： Yudong Shen Hao Liang zuwei liao Binbo Jiang Jingdai Wang Yongrong Yang Minggang Li Yibin Luo Xingtian Shu Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China SINOPEC Research Institute of Petroleum Processing Beijing 100083China

Coke is an important medium for connecting reaction and regeneration of the methanol to propylene process on the ZSM5 *** grows in the meso and macro pores,it gradually worsens the diffusion inside the catalyst ***,pore plugging is inevitable which causes the deactivation of ZSM5 ***,current continuum model cannot reflect the changes in pore structure with clear physical concepts.A discrete model that is verified by the carbon deposition experiments is introduced to indicate the behavior of pore plugging *** show that the pore plugging has a significant effect on the performance of the *** time varying profile of effectiveness factor is obtained,indicating a regular reduction with the increase of the pore plugging *** distributions of pore size that would significantly enhance the plugging effect are also identified.

关键词： Discrete model Pore plugging effects MTP reaction Pore network

Modeling and Optimization of Ethane Steam Cracking Process in An Industrial Tubular Reactor with Improved Reaction Scheme

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China Petroleum Processing & Petrochemical Technology 2020年第4期22卷 117-125页

作者： Mohsin Ali liao zuwei Yao Yang Sun Jingyuan Jiang Binbo Wang Jingdai Yang Yongrong Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027 State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027

Ethane steam cracking process in an industrial reactor was *** one-demsional(1D)steady-state model was developed firstly by using an improved molecular reaction scheme and was then simulated in Aspen Plus.A comparison of model results with industrial data and previously reported results showed that the model can predict the process kinetics more *** addition,the validated model was used to study the effects of different process variables,including coil outlet temperature(COT),steam-to-ethane ratio and residence time on ethane conversion,ethylene selectivity,products yields,and coking ***,steady-state optimization was conducted to the operation of industrial *** COT and steam-to-ethane ratio were taken as decision variables to maximize the annual operational profit.

关键词： ethane steam cracking tubular reactor Aspen Plus molecular reaction scheme process simulation process optimization