S. Chitra, K. Parameswari, C. Sivakami, A. Selvaraj
Sulphanilic acid and sulphanilamide schiff bases have been synthesised and evaluated as inhibitors for mild steel corrosion in 1M H 2 SO 4 by electrochemical and non electrochemical techniques. The inhibition efficiency increases with inhibitor concentration and decreases with temperature. The adsorption of the inhibitors on the mild steel surface obeys Langmuir and Temkin adsorption isotherms. Potentiodynamic polarization studies show that the inhibitors behave as mixed inhibitors. Addition of halide ions enhances the inhibition efficiency Keywords: Sulpha Schiff bases, potentiodynamic polarization, A.C. impedence, corrosion inhibitors DOI = 10.3329/cerb.v14i1.3766 Chemical Engineering Research Bulletin 14 (2010) 1-6
{"title":"Sulpha Schiff Bases as Corrosion Inhibitors for Mild Steel in 1M Sulphuric Acid","authors":"S. Chitra, K. Parameswari, C. Sivakami, A. Selvaraj","doi":"10.3329/CERB.V14I1.3766","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.3766","url":null,"abstract":"Sulphanilic acid and sulphanilamide schiff bases have been synthesised and evaluated as inhibitors for mild steel corrosion in 1M H 2 SO 4 by electrochemical and non electrochemical techniques. The inhibition efficiency increases with inhibitor concentration and decreases with temperature. The adsorption of the inhibitors on the mild steel surface obeys Langmuir and Temkin adsorption isotherms. Potentiodynamic polarization studies show that the inhibitors behave as mixed inhibitors. Addition of halide ions enhances the inhibition efficiency Keywords: Sulpha Schiff\u000b bases, potentiodynamic polarization, A.C. impedence, corrosion inhibitors DOI = 10.3329/cerb.v14i1.3766 Chemical Engineering Research Bulletin 14 (2010) 1-6","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"31 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2010-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77596339","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}
The efficiency of individual units of an effluent treatment plant (ETP) determines the overall performance of the plant and the final effluent quality. In this study an ETP of a composite textile industry was investigated using this method. Water samples were collected from the main units of the ETP and were analyzed for key parameters. The results were used to diagnose problems with the treatment units and to suggest modifications. From this, a simple but robust methodology was developed for evaluating the performance of the different treatment units and the ETP as a whole that could be implemented by ETP managers on a regular basis to improve the performance so that the effluent leaving the factory meets national standards and conforms to the requirements of international buyers. The results showed that poor management, especially chemical dosing, was seriously affecting the ETP's performance and that simple measures could address the problems. DOI: 10.3329/cerb.v13i2.3939 Chemical Engineering Research Bulletin 13 (2009) 61-66
{"title":"Methodology for Performance Analysis of Textile Effluent Treatment Plants in Bangladesh","authors":"M. Khan, Shoeb Ahmed, A. Evans, M. Chadwick","doi":"10.3329/CERB.V13I2.3939","DOIUrl":"https://doi.org/10.3329/CERB.V13I2.3939","url":null,"abstract":"The efficiency of individual units of an effluent treatment plant (ETP) determines the overall performance of the plant and the final effluent quality. In this study an ETP of a composite textile industry was investigated using this method. Water samples were collected from the main units of the ETP and were analyzed for key parameters. The results were used to diagnose problems with the treatment units and to suggest modifications. From this, a simple but robust methodology was developed for evaluating the performance of the different treatment units and the ETP as a whole that could be implemented by ETP managers on a regular basis to improve the performance so that the effluent leaving the factory meets national standards and conforms to the requirements of international buyers. The results showed that poor management, especially chemical dosing, was seriously affecting the ETP's performance and that simple measures could address the problems. DOI: 10.3329/cerb.v13i2.3939 Chemical Engineering Research Bulletin 13 (2009) 61-66","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"15 1","pages":"61-66"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82555934","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}
A new method has been established to make rice based ORS through absorption of salts in rice by soaking the rice in the solution of salts. The soaked rice was dried, fried, powdered and packaged. The rice powder thus prepared when mixed with water in the desired proportion, the suspensions contain Na + , K + and Cl - as prescribed. The process is named ‘solution method’ according to the preparation procedure. DOI: 10.3329/cerb.v13i2.3132 Chemical Engineering Research Bulletin 13 (2009) 47-50
{"title":"Preparation of Rice Based ORS by Solution Method","authors":"K. Kirtania, Devjyoti Nath","doi":"10.3329/CERB.V13I2.3132","DOIUrl":"https://doi.org/10.3329/CERB.V13I2.3132","url":null,"abstract":"A new method has been established to make rice based ORS through absorption of salts in rice by soaking the rice in the solution of salts. The soaked rice was dried, fried, powdered and packaged. The rice powder thus prepared when mixed with water in the desired proportion, the suspensions contain Na + , K + and Cl - as prescribed. The process is named ‘solution method’ according to the preparation procedure. DOI: 10.3329/cerb.v13i2.3132 Chemical Engineering Research Bulletin 13 (2009) 47-50","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"10 1","pages":"47-50"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87121765","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}
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
{"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":"31 1","pages":"39-46"},"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}
This paper presents an ASPEN PLUS TM simulation study for excess methanol recovery in continuous biodiesel production process using a distillation column. The feedstock used for biodiesel production was Triolein containing 15% free fatty acid (Oleic Acid). The special attention was devoted to the effect of different alcohol to oil ratio and important design and operating parameters of distillation column on excess methanol recovery from the product. The energy consumption is represented by reboiler heat duty of distillation column. Analysis of simulation results shows that for a certain distillation operating condition and reaction parameters it is possible to recover around 95-98% of excess methanol before phase separation of biodiesel and glycerol, although for high alcohol to oil ratio the energy requirement increases exponentially. DOI: 10.3329/cerb.v13i2.3538 Chemical Engineering Research Bulletin 13 (2009) 55-60
本文介绍了利用ASPEN PLUS TM进行生物柴油连续生产过程中过量甲醇回收的模拟研究。用于生产生物柴油的原料是含15%游离脂肪酸(油酸)的三油酸。重点讨论了不同醇油比、精馏塔重要设计和操作参数对产品剩余甲醇回收的影响。能耗用精馏塔再沸器热负荷表示。仿真结果分析表明，在一定的蒸馏操作条件和反应参数下，生物柴油和甘油相分离前可以回收95-98%左右的多余甲醇，但对于高醇油比，能量需求呈指数级增长。DOI: 10.3329/cerb.v13i2.3538化学工程研究通报13 (2009)55-60
{"title":"EXCESS METHANOL RECOVERY IN BIODIESEL PRODUCTION PROCESS USING A DISTILLATION COLUMN: A SIMULATION STUDY","authors":"B. Dhar, K. Kirtania","doi":"10.3329/CERB.V13I2.3538","DOIUrl":"https://doi.org/10.3329/CERB.V13I2.3538","url":null,"abstract":"This paper presents an ASPEN PLUS TM simulation study for excess methanol recovery in continuous biodiesel production process using a distillation column. The feedstock used for biodiesel production was Triolein containing 15% free fatty acid (Oleic Acid). The special attention was devoted to the effect of different alcohol to oil ratio and important design and operating parameters of distillation column on excess methanol recovery from the product. The energy consumption is represented by reboiler heat duty of distillation column. Analysis of simulation results shows that for a certain distillation operating condition and reaction parameters it is possible to recover around 95-98% of excess methanol before phase separation of biodiesel and glycerol, although for high alcohol to oil ratio the energy requirement increases exponentially. DOI: 10.3329/cerb.v13i2.3538 Chemical Engineering Research Bulletin 13 (2009) 55-60","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"44 1","pages":"55-60"},"PeriodicalIF":0.0,"publicationDate":"2009-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84772000","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}
Thermoplastic vulcanizates of polymethyl methacrylate (PMMA) and styrene butadiene rubber (SBR) were prepared by melt processing using dicumyl peroxide (DCP) as a vulcanizing agent. Effect of short glass fiber (SGF) on mechanical and rheological properties of PMMA/SBR vulcanizates has been investigated using universal testing machine and melt flow indexer. The results revealed increase in tensile strength and decrease in melt flow index as well as elongation at break on increasing concentration of short glass fiber. It was also scrutinized that with increase in fiber contents consistency index increases. On increasing fiber contents vulcanizates show more pronounced pseudoplastic behaviour. DOI: 10.3329/cerb.v13i2.3535 Chemical Engineering Research Bulletin 13 (2009) 51-54
{"title":"Effect of Short Glass Fiber on Mechanical and Rheological Properties of PMMA/SBR Vulcanizate","authors":"G. M. Mamoor, Nida Qamar, U. Mehmood, M. Kamal","doi":"10.3329/CERB.V13I2.3535","DOIUrl":"https://doi.org/10.3329/CERB.V13I2.3535","url":null,"abstract":"Thermoplastic vulcanizates of polymethyl methacrylate (PMMA) and styrene butadiene rubber (SBR) were prepared by melt processing using dicumyl peroxide (DCP) as a vulcanizing agent. Effect of short glass fiber (SGF) on mechanical and rheological properties of PMMA/SBR vulcanizates has been investigated using universal testing machine and melt flow indexer. The results revealed increase in tensile strength and decrease in melt flow index as well as elongation at break on increasing concentration of short glass fiber. It was also scrutinized that with increase in fiber contents consistency index increases. On increasing fiber contents vulcanizates show more pronounced pseudoplastic behaviour. DOI: 10.3329/cerb.v13i2.3535 Chemical Engineering Research Bulletin 13 (2009) 51-54","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"7 1","pages":"51-54"},"PeriodicalIF":0.0,"publicationDate":"2009-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73666096","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}
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
{"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":"10 1","pages":"29-38"},"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}
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 usive mixed convection, vented cavity, finite element DOI = 10.3329/cerb.v13i1.2512 Chemical Engineering Research Bulletin 13 (2009) 17-24
{"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":"4 1","pages":"17-24"},"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}
The Karnaphuli Rayon Complex (KRC) was permanently closed down in January 1997 by leaving behind about 180 tons of Carbon Disulfide (CS 2 ) in sixteen storage tanks at various locations of KRC and CS 2 plant including in some vessels of CS 2 plant itself. An incineration facility was planned, designed, constructed, commissioned and operated to dispose all CS 2 left behind. The facility used some of the facilities of the closed Sulfuric Acid Plant (30 tpd) which was closed in December 2002. The incineration facility was commissioned on April 1, 2008 and the processing of CS 2 was completed on September 16, 2008. Catastrophic failure of the tanks was inevitable and matter of time. Such failure would have led to events worse than Bhopal causing deaths, fatal injuries and immediate environmental damage of all types. This is a success story of local engineering endeavor from laboratory to industry. Keywords: Carbon Disulfide, KRC, Incineration, Safe Disposal DOI = 10.3329/cerb.v13i1.3207 Chemical Engineering Research Bulletin 13 (2009) 25-28
Karnaphuli Rayon Complex (KRC)于1997年1月永久关闭，在KRC和cs2工厂不同地点的16个储罐中留下了约180吨二硫化碳(cs2)，包括在cs2工厂本身的一些容器中。计划、设计、建造、启用和营运焚化设施，以处理所有弃置的铯。该设施使用了2002年12月关闭的硫酸厂(30吨/天)的一些设施。焚化设施于2008年4月1日投入使用，并于2008年9月16日完成cs2的处理工作。储罐的灾难性故障是不可避免的，也是时间问题。这种失败将导致比博帕尔更严重的事件，造成死亡、致命伤害和各种直接的环境破坏。这是一个本地工程努力从实验室到工业的成功故事。关键词:二硫化碳，KRC，焚烧，安全处置DOI = 10.3329/cerb.v13i1.3207化工研究通报13 (2009)25-28
{"title":"Processing of Carbon Disulfide at KRC for Safe Disposal","authors":"A. Quader","doi":"10.3329/CERB.V13I1.3207","DOIUrl":"https://doi.org/10.3329/CERB.V13I1.3207","url":null,"abstract":"The Karnaphuli Rayon Complex (KRC) was permanently closed down in January 1997 by leaving behind about 180 tons of Carbon Disulfide (CS 2 ) in sixteen storage tanks at various locations of KRC and CS 2 plant including in some vessels of CS 2 plant itself. An incineration facility was planned, designed, constructed, commissioned and operated to dispose all CS 2 left behind. The facility used some of the facilities of the closed Sulfuric Acid Plant (30 tpd) which was closed in December 2002. The incineration facility was commissioned on April 1, 2008 and the processing of CS 2 was completed on September 16, 2008. Catastrophic failure of the tanks was inevitable and matter of time. Such failure would have led to events worse than Bhopal causing deaths, fatal injuries and immediate environmental damage of all types. This is a success story of local engineering endeavor from laboratory to industry. Keywords: Carbon Disulfide, KRC, Incineration, Safe Disposal DOI = 10.3329/cerb.v13i1.3207 Chemical Engineering Research Bulletin 13 (2009) 25-28","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"17 1","pages":"25-28"},"PeriodicalIF":0.0,"publicationDate":"2009-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73511880","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}
Carbon prepared from the epicarp of Ricinus communis was used to remove a textile dye (methylene blue (MB)) from an aqueous solution by adsorption technique under varying conditions of agitation time, dye concentration, adsorbent dose and pH. Adsorption depended on solution pH, dye concentration, carbon concentration and contact time. Adsorption followed both Langmuir and Freundlich isotherm models. The adsorption capacity was found to be 62.5mg/g at a neutral pH of 7 for the particle size of 125-250 µm at room temperature (32±2°C). The kinetics of adsorption of MB obeys Pseudo-first order. The results in this study indicated that activated carbon from Ricinus communis was an attractive candidate for removing cationic dyes from the dye wastewater. Keywords: Epicarp, Ricinus communis, Adsorption, Methylene blue, Kinetics DOI = 10.3329/cerb.v13i1.2518 Chemical Engineering Research Bulletin 13 (2009) 1-5
{"title":"REMOVAL OF METHYLENE BLUE FROM AQUEOUS SOLUTION BY BIOADSORPTION ONTO Ricinus communis EPICARP ACTIVATED CARBON","authors":"T. Santhi, S. Manonmani","doi":"10.3329/CERB.V13I1.2518","DOIUrl":"https://doi.org/10.3329/CERB.V13I1.2518","url":null,"abstract":"Carbon prepared from the epicarp of Ricinus communis was used to remove a textile dye (methylene blue (MB)) from an aqueous solution by adsorption technique under varying conditions of agitation time, dye concentration, adsorbent dose and pH. Adsorption depended on solution pH, dye concentration, carbon concentration and contact time. Adsorption followed both Langmuir and Freundlich isotherm models. The adsorption capacity was found to be 62.5mg/g at a neutral pH of 7 for the particle size of 125-250 µm at room temperature (32±2°C). The kinetics of adsorption of MB obeys Pseudo-first order. The results in this study indicated that activated carbon from Ricinus communis was an attractive candidate for removing cationic dyes from the dye wastewater. Keywords: Epicarp, Ricinus communis, Adsorption, Methylene blue, Kinetics DOI = 10.3329/cerb.v13i1.2518 Chemical Engineering Research Bulletin 13 (2009) 1-5","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"os-57 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2009-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87100170","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}
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