Chemical Engineering Research Bulletin最新文献_第9页

Sulpha Schiff Bases as Corrosion Inhibitors for Mild Steel in 1M Sulphuric Acid 硫希夫碱对低碳钢在1M硫酸中的缓蚀作用

Chemical Engineering Research Bulletin Pub Date : 2010-02-07 DOI: 10.3329/CERB.V14I1.3766

S. Chitra, K. Parameswari, C. Sivakami, A. Selvaraj

引用次数: 30

Methodology for Performance Analysis of Textile Effluent Treatment Plants in Bangladesh 孟加拉国纺织废水处理厂性能分析方法

Chemical Engineering Research Bulletin Pub Date : 2009-12-31 DOI: 10.3329/CERB.V13I2.3939

M. Khan, Shoeb Ahmed, A. Evans, M. Chadwick

引用次数: 23

Preparation of Rice Based ORS by Solution Method 溶液法制备稻基ORS

Chemical Engineering Research Bulletin Pub Date : 2009-12-31 DOI: 10.3329/CERB.V13I2.3132

K. Kirtania, Devjyoti Nath

引用次数: 0

Strategy for Developing the Fertilizer Sector in Bangladesh for Sustainable Agriculture 发展孟加拉国肥料部门促进可持续农业战略

Chemical Engineering Research Bulletin Pub Date : 2009-12-31 DOI: 10.3329/CERB.V13I2.3126

A. Quader

{"title":"Strategy for Developing the Fertilizer Sector in Bangladesh for Sustainable Agriculture","authors":"A. Quader","doi":"10.3329/CERB.V13I2.3126","DOIUrl":"https://doi.org/10.3329/CERB.V13I2.3126","url":null,"abstract":"A strategic program for developing the fertilizer sector in Bangladesh for sustainable agriculture is presented in this paper. Based on the land utilization and likely cropping patterns in the future, the expected demands for different fertilizers such as urea, diammonium phosphate, TSP, SSP and MOP have been estimated. Considering the production capacities of different fertilizers in the country as well as the conditions of the plants against the estimated demands, Bangladesh immediately requires to add additional production capacities for urea (1122,000 tpy), SSP (960,000 tpy), Phosphoric acid (226,000 tpy, 100% P 2 O5), Sulfuric Acid (1000,000 tpy) and Muriate of Potash (700,000 tpy). The estimated investment for adding these capacities would be around US$ 1860 million. If these additional capacities are not built, the costs for import of different fertilizers including staple cereals would be in excess of US$ 1700 (fertilizer ≈US $ 900) million every year. If the envisaged projects for adding capacities are implemented, this will make the agriculture sustainable and less dependent on import of fertilizers. DOI: 10.3329/cerb.v13i2.3126 Chemical Engineering Research Bulletin Vol.13 2009 39-46","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74467408","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: 13

EXCESS METHANOL RECOVERY IN BIODIESEL PRODUCTION PROCESS USING A DISTILLATION COLUMN: A SIMULATION STUDY 用精馏塔回收生物柴油生产过程中过量甲醇的模拟研究

Chemical Engineering Research Bulletin Pub Date : 2009-12-31 DOI: 10.3329/CERB.V13I2.3538

B. Dhar, K. Kirtania

引用次数: 69

Effect of Short Glass Fiber on Mechanical and Rheological Properties of PMMA/SBR Vulcanizate 短玻璃纤维对PMMA/SBR硫化胶力学和流变性能的影响

Chemical Engineering Research Bulletin Pub Date : 2009-12-29 DOI: 10.3329/CERB.V13I2.3535

G. M. Mamoor, Nida Qamar, U. Mehmood, M. Kamal

引用次数: 4

Stabilizing the Operation of Industrial Processes using Data Driven Techniques 使用数据驱动技术稳定工业过程的运行

Chemical Engineering Research Bulletin Pub Date : 2009-10-05 DOI: 10.3329/CERB.V13I1.2995

M. Choudhury, Ian Alleyne

{"title":"Stabilizing the Operation of Industrial Processes using Data Driven Techniques","authors":"M. Choudhury, Ian Alleyne","doi":"10.3329/CERB.V13I1.2995","DOIUrl":"https://doi.org/10.3329/CERB.V13I1.2995","url":null,"abstract":"Poor performance of a control loop is usually caused by poor controller tuning, presence of disturbances, control loop interactions and/or loop nonlinearities. The presence of nonlinearities in control loops is one of the main reasons for poor performance of a linear controller designed based on linear control theory. In a control loop, nonlinearities may appear either in the control instruments such as valves and positioners or in the process. Among the control valve nonlinearities stiction, deadband, deadzone, hysteresis and saturation are most common. A nonlinear system often produces a non-Gaussian and nonlinear time series. The test of Gaussianity or nonlinearity of a control loop variable serves as a useful diagnostic aid towards diagnosing the causes of poor performance of a control loop. Ttwo indices, the Non-Gaussianity Index ( NGI ) and the Non-Linearity Index ( NLI ), developed in [1] are used to detect the possible presence of nonlinearity in the loop. These indices together with specific patterns in the process output ( pv ) vs. the controller output ( op ) plot can be conveniently used to diagnose the causes of poor control loop performance thus ensuring smooth operation of the plant. The method has been successfully applied to many industrial data sets. One of the interesting case studies is presented in this paper. The results of the analysis were confirmed and the results after the troubleshooting was performed are also presented. Keywords: Nonlinearities, stiction, performance monitoring, nonGaussianity, process industries, control valves DOI = 10.3329/cerb.v13i1.2995 Chemical Engineering Research Bulletin 13 (2009) 29-38","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88980703","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

DOUBLE DIFFUSIVE MIXED CONVECTION HEAT TRANSFER INSIDE A VENTED SQUARE CAVITY 方形通风腔内双扩散混合对流换热

Chemical Engineering Research Bulletin Pub Date : 2009-10-04 DOI: 10.3329/CERB.V13I1.2512

S. Saha, M. Hasan, I. Khan

{"title":"DOUBLE DIFFUSIVE MIXED CONVECTION HEAT TRANSFER INSIDE A VENTED SQUARE CAVITY","authors":"S. Saha, M. Hasan, I. Khan","doi":"10.3329/CERB.V13I1.2512","DOIUrl":"https://doi.org/10.3329/CERB.V13I1.2512","url":null,"abstract":"A numerical study has been carried out for laminar double-diffusive mixed convection in a two-dimensional vented square cavity with discrete heat and contaminant sources applied on the bottom wall. An external air flow enters the cavity through an opening located at the bottom of the left vertical wall and exits from an opening located at the three different positions of the opposite wall. The developed mathematical model is governed by the two-dimensional continuity, momentum, energy, and concentration equations. The governing equations, written in non-dimensional form are solved by using Galerkin finite element method with triangular grid discretization system. The Reynolds number is fixed at 100 and the working fluid is considered as air. Numerical simulations are carried out for different combinations of the thermal Grashof numbers and results are presented in terms of streamlines, temperature and concentration distributions. The results indicate that the average Nusselt and Sherwood numbers on the heat and contaminant sources strongly depend on the positioning of the exit opening. Keywords: double di\u000busive mixed convection, vented cavity, finite element DOI = 10.3329/cerb.v13i1.2512 Chemical Engineering Research Bulletin 13 (2009) 17-24","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75053469","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: 20

Processing of Carbon Disulfide at KRC for Safe Disposal KRC二硫化碳的安全处理

Chemical Engineering Research Bulletin Pub Date : 2009-10-04 DOI: 10.3329/CERB.V13I1.3207

A. Quader

引用次数: 0

REMOVAL OF METHYLENE BLUE FROM AQUEOUS SOLUTION BY BIOADSORPTION ONTO Ricinus communis EPICARP ACTIVATED CARBON 蓖麻外皮活性炭生物吸附去除水溶液中的亚甲基蓝

Chemical Engineering Research Bulletin Pub Date : 2009-08-10 DOI: 10.3329/CERB.V13I1.2518

T. Santhi, S. Manonmani

引用次数: 33