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考虑本质安全的换热网络多目标优化
换热网络 stage-wise 本质安全 多目标优化 Pareto前沿
2023/6/21
由于国内外重大化工事故的频发及化工行业节能降耗的需求日益迫切,研究本质更安全的换热网络多目标优化具有重要意义.采用评价指数的方法,对换热网络的本质安全易爆性、毒性、存量进行量化表征.采用数学规划法分别建立换热网络经济与本质安全易爆性、毒性、存量同步优化数学模型.采用归一化法构建经济和安全的目标函数.通过算例研究发现,考虑易爆性,倾向于不易爆流股间换热,减少易爆流股换热次数;考虑毒性,倾向于减少有毒...
为改善电催化活性和亲水性,作者对商业碳黑(BP2000)进行了酸处理,获得了酸处理碳(ATC).通过X光电子能谱、红外光谱、热重和接触角测试的表征方法证明了酸处理在碳表面产生了丰富的含氧基团.本文首次利用紫外可见光谱测试了碱性条件抗坏血酸(AA)在空气中的化学氧化活化能,结果为37.1 kJ·mol~(-1).另外,利用交流阻抗谱对碱性条件下ATC作为电催化剂时AA的氧化反应的活化能进行了评价.碱...
Chemiluminescence Sensor Based on Composite Functional Nucleic Acid for Detection of Ochratoxin A in Wine
Functional nucleic acid Aptamer Split DNAzyme Chemiluminescence Ochratoxin A
2023/6/21
Chemiluminescence Sensor Based on Composite Functional Nucleic Acid for Detection of Ochratoxin A in Wine
Revealing the effect of aluminum content on the electrochemical performance of magnesium anodes for aqueous batteries
aluminum content discharge potential Mg-Al alloy anodes utilization efficiency
2023/6/21
Al is one of the principal alloying elements for Mg anodes. In this study, a series of Mg-Al alloys has been evaluated as anode materials for optimizing the Al addition amount in Mg anodes with the in...
Uniform Pd0.33Ir0.67 nanoparticles supported on nitrogen-doped carbon with remarkable activity toward the alkaline hydrogen oxidation reaction
Alkalinity Anodes Binary alloys Carbon Cyclic voltammetry Density functional theory
2023/6/21
Highly efficient non-Pt electrocatalysts for the alkaline hydrogen oxidation reaction (HOR) are required to enable complete replacement of Pt in hydroxide exchange membrane fuel cells (HEMFCs). Herein...
以七水合硫酸锌(ZnSO4?7H2O)和六亚甲基四胺(HMT)为原料,采用化学浴沉积法合成了碱式硫酸锌(ZSH)微米片,并将其作为填料嵌入氟碳(FC)清漆中.采用傅里叶变换红外光谱仪、场发射扫描电镜、能谱仪和X射线衍射仪分析了ZSH微米片的健结构、形貌和组分.对比了不同ZSH的质量分数时在紫铜上所得FC–ZSH复合涂层的剖面结构、ZSH分布情况及腐蚀防护性能.结果表明,所得ZSH呈典型的六方片状晶...
Controlled Preparation of MgAl-Layered Double Hydroxide/Graphene Hybrids and Their Applications for Metal Protection
MgAl-Layered Double Hydroxide Graphene Hybrids
2023/6/21
The ion-conductive nature of layered double hydroxides (LDHs) and poor dispersibility of graphene are considered to be vital problems that limit their applications in the field of metal protection. Th...
The role of graphene loading on the corrosion-promotion activity of graphene/epoxy nanocomposite coatings
Graphene Polymer-matrix composites Coatings Corrosion
2023/6/21
It is still arguable whether graphene/polymer nanocomposite coating is corrosion inhibitors or promoters. This work aims to determine the "percolation threshold" for corrosion-promotion activity of th...
Partially dehydrated zinc hydroxide sulfate nanoplates reinforced coating for corrosion protection
Zinc hydroxide sulfate Dehydration Crystal phase transition Active barrier Synergistic effect
2023/6/21
In this work, partially dehydrated zinc hydroxide sulfate nanoplates are synthesized by facile chemical bath deposition together with subsequent heat dehydration. The nanoplates exhibit well-defined h...
Heat exchanger network synthesis integrated with flexibility and controllability
Heat exchanger networks Flexibility Controllability Coupling Synthesis
2023/6/19
Over the last three decades, flexibility and controllability considerations for heat exchanger networks (HENs) have received great attention, respectively. However, they should be simultaneously incor...
Computer-Aided Polymer Design: Integrating Group Contribution and Molecular Dynamics
Polymer Design Integrating Group Contribution Molecular Dynamics
2023/6/19
Polymers are widely used to manufacture many chemical products. Often, polymers are designed by trial-and-error, which is expensive and time-consuming. In this work, a new optimization-based computer-...
Economic evaluation and environmental assessment of shale gas dehydration process
Shale gas Dehydration Optimization Hybrid LCI model Input-output model
2023/6/19
Triethylene glycol (TEG) is widely applied to the removal of water in shale gas. This study presents a framework of economic evaluation and environmental assessment for two TEG-based dehydration appro...
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.