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煤气化工艺作为煤制天然气的重要环节,是实现煤炭资源清洁利用的关键.基于化工流程模拟软件Aspen Plus建立BGL(British Gas Lurgi)炉煤气化工艺,以合成气有效成分、制气效率及水蒸气分解率为评价指标,考察常规气化技术中气化剂操作参数对工艺的耦合作用,得出最优气化剂组成及预热温度;同时,为解决煤气化过程中CO2排放量大及氢碳比较低的问题,分别引入CO2、CH4对气化剂进行改进,进...
基于超结构法的间接式功交换网络综合
间接式功交换网络 超结构模型 同轴涡轮压缩机 流股匹配
2023/6/19
由于间接式功交换网络在工业上应用广泛,提出了基于超结构模型的间接式功交换网络综合方法.通过构建分级超结构,以年度总费用最小为目标建立了混合整数非线性规划模型.根据设备操作曲线提出压力与流量的约束,实现了间接式功交换网络中流股间的可行匹配,得到了最优功交换网络结构.算例结果分析表明,最优功交换网络结构的年度总费用比未进行流股匹配的基础结构减少了29.04％,验证了模型的有效性与网络结构优化的可行性.
双膜组件及耦合工艺的研究与应用进展
气体膜分离 双膜组件 耦合工艺 过程强化
2023/6/19
气体膜分离技术受到工业化膜材料性能的限制,往往不能同时达到生产过程对选择性和渗透性的要求.双膜组件是将两种气体渗透性能不同甚至相反的膜材料集成到一个组件中,可以很好地弥补膜材料自身选择性差以及渗透速率低的缺陷.首先介绍了双膜组件的研究进展,回顾了双膜组件从产生到发展几个主要研究团队的贡献.随后,介绍了双膜组件强化传质和分离的特点,展示了双膜组件降低膜两侧浓差极化的基本原理,分析了流动形式对组件分离...
Optimization of shale gas sweetening process coupling with claus process based on energy synthesis
gas sweetening claus process energy synthesis
2023/6/19
As a sort of emerging unconventional energy, shale gas has extensive market outlook by virtue of its enormous reserves, and concerns for shale gas exploitation and processing have been raised nowadays...
Design and control of a novel side-stream extractive distillation column for separating methanol-toluene binary azeotrope with intermediate boiling entrainer
Side-stream extractive distillation column intermediate boiling entrainer Dynamic control Binary azeotrope Methanol-toluene
2023/6/19
It is innovative and important to perform complex binary azeotrope separation via single distillation column. In the article, design and control of a novel and simple side-stream extractive distillati...
Research advances on process systems integration and process safety in China
heat integration process safety management process synthesis water network optimization
2023/6/19
Process systems engineering research focuses on the planning, design, operation, and safety of process systems rather than unit operations. In response to the rapid growth of the chemical process indu...
A thermo-economic multi-objective optimization model for simultaneous synthesis of heat exchanger networks including compressors
Superstructure Heat exchanger networks Compressor Mathematical programming Multi-objective Thermo-economic
2023/6/19
TWo significant forms of energy widely used in chemical industries are heat and work related to temperature and pressure manipulation. Since complex relationship exists in these strongly interacting p...
Computer-aided reaction solvent design considering inertness using group contribution-based reaction thermodynamic model
CAMD MINLP model Reaction solvent Group contribution Inertness
2023/6/19
Solvents have been widely used in process manufacturing industries. When involved in liquid-phase organic synthesis reactions, solvents can reduce the activation energy of reactions between the reacta...
功和热是化工工业中使用能源的两种最主要方式,由于流股压力、温度操作需要消耗大量的功热,因此研究功热的协同利用对于提高过程整体能源利用率具有重要的意义.本文首先概述了基于热力学分析的功热交换网络综合的研究情况,以系统?耗最小为目标探讨压缩机、膨胀机优化配置与换热网络用能瓶颈的耦合关系,揭示了功热协同利用的作用机制.然后系统地总结了以年度总费用最小为目标的数学规划模型综合功热交换网络的研究进展,探寻压...
将可见光催化、不对称合成、分子氧氧化和连续化集成,创新性地用玻璃微通道反应器实现可见光活化分子氧氧化的β-酮酸酯类化合物的不对称α-羟基化反应的连续工艺.用金鸡纳碱衍生的相转移有机催化剂在气-液-液多相体系内实现可见光催化,分子氧不对称氧化连续反应.在心形微通道反应器内,1-茚酮-2-甲酸金刚酯底物完全氧化为(S)-2-羟基-1-茚酮-2-甲酸金刚酯,产物收率95%,对映选择性87.0%.与间歇反...
Multiobjective Optimization of Interplant Heat Exchanger Networks Considering Utility Steam Supply and Various Locations of Interplant Steam Generation/Utilization
Heat Exchanger Networks Utility Steam Supply
2023/6/19
A multiobjective optimization (MOO) framework considering the dual objectives of the economy and the environment is presented in this work for the extended integration of interplant heat exchanger net...
非氟聚合物磺化聚芳醚砜酮(SPPESK)具有甲醇渗透率低、化学、热稳定性高等优点,但其高的电导率需通过提高磺化度获得,导致膜因过度溶胀而失去尺寸稳定性.添加无机纳米颗粒可以有效提高膜性能,但因其表面缺少功能化基团,导致颗粒有机相容性差,阻醇性能和质子传导率不易同时提高.硫酸化改性的纳米颗粒因其表面具有酸性位点和硫酸基团,能够有效克服这一问题.本文制备表面硫酸化改性的SnO2(SSnO2)纳米颗粒并...
Systems Pharmacology Dissection of Multiscale Mechanisms of Action for Herbal Medicines in Treating Rheumatoid Arthritis
Rheumatoid arthritis TCM Systems-Pharmacology MD MM-PBSA
2023/6/19
As a chronic inflammatory and angiogenic disease with increased morbidity and mortality, rheumatoid arthritis (RA) is characterized by the proliferation of synovial tissue and the accumulation of exce...
Machine learning-based atom contribution method for the prediction of surface charge density profiles and solvent design
atom contribution computer-aided molecular design decomposition-based algorithm machine learning
2023/6/19
Solvents are widely used in chemical processes. The use of efficient model-based solvent selection techniques is an option worth considering for rapid identification of candidates with better economic...
Design and comparison of conventional and side-stream extractive distillation sequences for separating the methanol-toluene binary azeotrope with intermediate boiling entrainer
Side-stream extractive distillation Separation sequences Intermediate boiling entrainer Eco-efficiency analysis Methanol-toluene
2023/6/19
The side-stream extractive distillation (SSED) system is attracting widespread attention due to its high eco-efficiency. In the article, three double-column SSED (DC-SSED) sequences and two single-col...