Advances in Chemical Engineering and Science最新文献_第4页

Process Intensification in the Manufacturing of Biotherapeutics 生物治疗药物生产中的工艺强化

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.1016/s0065-2377(22)x0002-1

引用次数: 0

A Modeling Study for Moisture Diffusivities and Moisture Transfer Coefficients in Drying of “Violet de Galmi” Onion Drying “紫加尔米”洋葱干燥过程中水分扩散系数和水分传递系数的模拟研究

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.4236/aces.2022.123013

A. Compaoré, S. Ouoba, Kondia Honoré Ouoba, M. Simo-Tagne, Y. Rogaume, C. Ahouannou, A. Dissa, A. Béré, J. Koulidiati

引用次数: 1

Thermal Pyrolysis of Waste Disposable Plastic Syringes and Pyrolysis Thermodynamics 废弃一次性塑料注射器的热热解及热解热力学

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.4236/aces.2022.122008

A. Koç

{"title":"Thermal Pyrolysis of Waste Disposable Plastic Syringes and Pyrolysis Thermodynamics","authors":"A. Koç","doi":"10.4236/aces.2022.122008","DOIUrl":"https://doi.org/10.4236/aces.2022.122008","url":null,"abstract":"In this study, the convertibility of disposable plastic waste injectors made of HDPE and PP plastics into valuable chemical products by thermal pyrolysis was investigated. While PP plastic wastes were decomposed in the temperature range of 400˚C - 445˚C, HDPE plastic wastes were decomposed in the higher temperature range (430˚C - 475˚C). Although the physical appearance of the liquid products obtained in the thermal decomposition of PP plastic wastes are lighter in color and fluid, it has been observed that the liquid decomposition products of HDPE plastic wastes have a more dense and viscous structure. By using the first-order kinetic model, kinetic expressions for both plastic wastes were derived, reaction rate constants, k, and activation energy, E act , and thermodynamic quantities such as reaction enthalpy, ∆H ≠ , reaction entropy, ∆S ≠ ve and Gibbs free energy, ∆G ≠ were calculated. In the thermal pyrolysis of PP and HDPE plastic wastes, E act , ∆H ≠ , ∆G ≠ , ∆S ≠ values are 162.30 kJ/mol, 156.52 kJ/mol, 219.50 kJ/mol, −87.71 J/molK, and 201.80 kJ/mol, 195.77 kJ/mol, and 229.14 kJ/mol, −46.48 J/molK, respectively. These thermodynamic quantities calculated for both plastic wastes show that the pyrolytic decomposition studies carried out in an inert gas atmosphere have endothermic reaction behavior.","PeriodicalId":7332,"journal":{"name":"Advances in Chemical Engineering and Science","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86605219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Signatures of Acid Concentration on the Optical Band Gap and Associated Band Tails of Chitosan from Shrimp for Application in Optoelectronic Devices 酸浓度在虾壳聚糖光学带隙和带尾上的特征及其在光电器件中的应用

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.4236/aces.2022.121001

Edwin Atego, John Agumba, G. Barasa

引用次数: 0

Calibration of Hydrogen Peroxide Vapour Sensor 过氧化氢蒸气传感器的校正

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.4236/aces.2022.123012

Aateqah Zaib, Syeda Sabera Begum

引用次数: 0

Practical Method for Designing Gas Conditions of Atomic Layer Deposition 设计原子层沉积气体条件的实用方法

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.4236/aces.2022.124014

Linsheng Xie, Hitoshi Habuka, H. Ushikawa

引用次数: 0

Analysis of Non-Selective Catalyst Reduction Performance with Dedicated Exhaust Gas Recirculation 专用尾气再循环非选择性催化剂还原性能分析

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.4236/aces.2022.122009

Chris A. Van Roekel, D. Montgomery, J. Singh, D. Olsen

{"title":"Analysis of Non-Selective Catalyst Reduction Performance with Dedicated Exhaust Gas Recirculation","authors":"Chris A. Van Roekel, D. Montgomery, J. Singh, D. Olsen","doi":"10.4236/aces.2022.122009","DOIUrl":"https://doi.org/10.4236/aces.2022.122009","url":null,"abstract":"Rich burn industrial natural gas engines offer best in class post catalyst emissions by using a non-selective catalyst reduction aftertreatment technology. However, they operate with reduced power density when compared to lean burn engines. Dedicated exhaust gas recirculation (EGR) offers a possible pathway for rich burn engines to use non-selective catalyst reduction aftertreatment technology without sacrificing power density. In order to achieve best in class post catalyst emissions, the precious metals and washcoat of a non-selective catalyst must be designed according to the expected exhaust composition of an engine. In this work, a rich burn industrial natural gas engine operating with dedicated EGR was paired with a commercially available non-selective catalyst. At rated brake mean effective pressure (BMEP) the air-fuel ratio was swept between rich and lean conditions to compare the catalyst reduction efficiency and post catalyst emissions of rich burn and dedicated EGR combustion. It was found that due to low oxides of nitrogen (NO x ) emissions across the entire air-fuel ratio range, dedicated EGR offers a much larger range of air-fuel ratios where low regulated emissions can be met. Low engine out NO x also points towards a possibility of using an oxidation catalyst rather than a non-selective catalyst for dedicated EGR applications. The location of the NO x -CO tradeoff was shifted to more rich conditions using dedicated EGR.","PeriodicalId":7332,"journal":{"name":"Advances in Chemical Engineering and Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89625241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Technology of Green Chemistry and Its Function in Redox Response and: Environmentally Friendly Technology for Sustainable Development: Assessment of Recent Findings 绿色化学技术及其在氧化还原反应中的作用和可持续发展的环境友好技术:最近研究成果的评价

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.4236/aces.2022.123010

Meselu Eskezia Ayalew, T. S. A. Jeevan

引用次数: 1

Performance Evaluation of Ionic Liquids Using Numerical Simulation 离子液体性能的数值模拟评价

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.4236/aces.2022.123011

Mostafa Elaghoury, Ali Alarbah, E. Shirif, Na Jia

引用次数: 0

Compositionally Driven Viscometric Behaviors of Poly (Alkyl Methacrylates) in Lubricating Oils 聚甲基丙烯酸烷基酯在润滑油中的组分驱动粘度行为

Advances in Chemical Engineering and Science Pub Date : 2022-01-01 DOI: 10.4236/aces.2022.122006

Reid Patterson, Christopher R. Kabb, David M. Nickerson, E. Pashkovski

{"title":"Compositionally Driven Viscometric Behaviors of Poly (Alkyl Methacrylates) in Lubricating Oils","authors":"Reid Patterson, Christopher R. Kabb, David M. Nickerson, E. Pashkovski","doi":"10.4236/aces.2022.122006","DOIUrl":"https://doi.org/10.4236/aces.2022.122006","url":null,"abstract":"Viscosity index (VI) and shear stability index (SSI) are standard methods used in the lubricant industry to determine temperature-viscosity dependen-cy and resistance to product degradation, respectively. A variety of oil-soluble polymers, including poly(alkyl methacrylates) (PAMAs) are routinely used to control these properties in fully-formulated liquid lubricants. In this report, we use reversible addition-fragmentation chain transfer (RAFT) polymerization to precisely target identical degrees of polymerization in a family of PAMAs with varying lauryl, hexyl, butyl, ethyl, and methyl groups. Then, ex-panding on previous methodology reported in the literature, we establish structure property relationships for these PAMAs, specifically looking at how intrinsic viscosity [η] and Martin interaction parameters K M relate to VI and SSI characteristics. While the intrinsic viscosity [η] is associated with the volume of macromolecules at infinite dilution, the parameter K M reflects the hydrodynamic interactions of polymer chains at actual polymer concentrations in lubricating oils. In this paper, we show that the dependence of VI on the non-dimensional concentration c/c* (or c[η]) can be presented in a form of master curve with shift factors proportional to K M that decreases with increasing size of alkyl groups. This finding implies that even in the dilute regime, the coil-expansion theory used to explain the effect of macromolecules on VI should be complemented with the idea of hydrodynamic interactions between polymer molecules that can be controlled by the choice of alkyl chains in the family of PAMAs.","PeriodicalId":7332,"journal":{"name":"Advances in Chemical Engineering and Science","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90791162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0