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Ultrasonic cavitation induced degradation of Congo red in aqueous solutions 超声空化诱导刚果红在水溶液中的降解
Chemical Engineering Research Bulletin Pub Date : 2010-12-06 DOI: 10.3329/CERB.V14I2.5899
S. Meshram, D. Tayade, P. D. Ingle, P. D. Jolhe, B. Diwate, S. Biswas
{"title":"Ultrasonic cavitation induced degradation of Congo red in aqueous solutions","authors":"S. Meshram, D. Tayade, P. D. Ingle, P. D. Jolhe, B. Diwate, S. Biswas","doi":"10.3329/CERB.V14I2.5899","DOIUrl":"https://doi.org/10.3329/CERB.V14I2.5899","url":null,"abstract":"Ultrasonic cavitation induced degradation of Congo red in aqueous solution was investigated for a variety of operating conditions. It is found that the degradation of Congo red in aqueous solution follows pseudo-first-order reaction kinetics and the degradation rate is dependent on the initial concentration of Congo red, the temperature and pH of the aqueous medium. The effects of Fe 2+ and Fenton reagent addition on the sonochemical degradation of Congo red were also investigated. The results obtained here indicate that the degradation rate of Congo red in aqueous solution was substantially accelerated by Fe 2+ , NaCl or Fenton reagent addition. Keywords: Degradation; Congo red; cavitation; sonochemistry DOI = 10.3329/cerb.v14i2.5899 Chemical Engineering Research Bulletin 14 (2010) 119-123","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78173617","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: 23
Effect of unsaturated polyester concentration on rheological characteristics of polypropylene-unsaturated polyester reactive blend 不饱和聚酯浓度对聚丙烯-不饱和聚酯反应共混物流变特性的影响
Chemical Engineering Research Bulletin Pub Date : 2010-11-30 DOI: 10.3329/CERB.V14I2.5955
G. M. Mamoor, M. N. Khan, Asad Ali, S. Shahid, M. Iqbal
{"title":"Effect of unsaturated polyester concentration on rheological characteristics of polypropylene-unsaturated polyester reactive blend","authors":"G. M. Mamoor, M. N. Khan, Asad Ali, S. Shahid, M. Iqbal","doi":"10.3329/CERB.V14I2.5955","DOIUrl":"https://doi.org/10.3329/CERB.V14I2.5955","url":null,"abstract":"Reactive blends of polypropylene and unsaturated polyester with different compositions were prepared by melt processing using dicumyl peroxide (DCP) as initiator in a plasticoder. Rheological Characteristics of the blends were studied as a function of unsaturated polyester concentration over a range of strain rate. The possibility of forming a graft polymer increased with increasing the unsaturated polyester content. Change in viscosity behavior of the blends was a result of the competing reactions of degradation and grafting. Keywords: DCP; strain rate; degradation; grafting DOI = 10.3329/cerb.v14i2.5955 Chemical Engineering Research Bulletin 14 (2010) 105-108","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76535947","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
Recent developments in intrinsically conductive polymer coatings for corrosion protection 本征导电聚合物防腐涂料的最新进展
Chemical Engineering Research Bulletin Pub Date : 2010-11-18 DOI: 10.3329/CERB.V14I2.5918
M. I. Khan, A. Chaudhry, S. Hashim, M. Zahoor, M. Iqbal
{"title":"Recent developments in intrinsically conductive polymer coatings for corrosion protection","authors":"M. I. Khan, A. Chaudhry, S. Hashim, M. Zahoor, M. Iqbal","doi":"10.3329/CERB.V14I2.5918","DOIUrl":"https://doi.org/10.3329/CERB.V14I2.5918","url":null,"abstract":"Intrinsically conductive polymers have achieved demanding interest in the field of corrosion control coatings owing to their conductive ability and also due to the strict environmental regulations on conventional heavy metals coatings. This multipurpose class of polymers has shown to be effective and proven themselves as a potential alternate for these hazardous heavy metal coatings in order to control the corrosion properties of metals or alloys. The basic purpose of this paper is only to highlight the past decade work relating to the efforts made on protection of metals from corrosion using conductive polymers.  The categorization of the coatings is based on the techniques used to apply them. This paper will also discuss the synthesis and prospective applications of these coatings depending on their different formation techniques. Keywords: Conductive polymers; corrosion; coatings DOI = 10.3329/cerb.v14i2.5918 Chemical Engineering Research Bulletin 14 (2010) 73-86","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73496564","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: 25
Representation of material balance for fractional crystallization of reciprocal salt pair Systems: KNO 3 production case study 互易盐对系统分馏结晶的物质平衡表征:kno3生产案例研究
Chemical Engineering Research Bulletin Pub Date : 2010-11-18 DOI: 10.3329/CERB.V14I2.5542
S. Ghader, Vahid Shadravan, S. Mansouri, A. Farsi
{"title":"Representation of material balance for fractional crystallization of reciprocal salt pair Systems: KNO 3 production case study","authors":"S. Ghader, Vahid Shadravan, S. Mansouri, A. Farsi","doi":"10.3329/CERB.V14I2.5542","DOIUrl":"https://doi.org/10.3329/CERB.V14I2.5542","url":null,"abstract":"In this paper, determination of material balance for reciprocal salt pair systems is considered and special case of KNO 3 production is solved. A scheme is presented for calculation of material balance which is based on the conservation of ions and water. Material balance requires equilibrium composition and phase diagram of solid-liquid equilibria that is calculated by extended UNIQUAC thermodynamic model. Keywords: Fractional crystallization; KNO 3 production; Material balance; Reciprocal Salt Pair systems DOI = 10.3329/cerb.v14i2.5542 Chemical Engineering Research Bulletin 14 (2010) 103-109","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74676400","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: 1
The influence of nickel loading on reducibility of NiO/Al 2 O 3 catalysts synthesized by sol-gel method 负载镍对溶胶-凝胶法制备NiO/ al2o3催化剂还原性的影响
Chemical Engineering Research Bulletin Pub Date : 2010-11-11 DOI: 10.3329/CERB.V14I2.5052
Mohammad Zangouei, A. Z. Moghaddam, M. Arasteh
{"title":"The influence of nickel loading on reducibility of NiO/Al 2 O 3 catalysts synthesized by sol-gel method","authors":"Mohammad Zangouei, A. Z. Moghaddam, M. Arasteh","doi":"10.3329/CERB.V14I2.5052","DOIUrl":"https://doi.org/10.3329/CERB.V14I2.5052","url":null,"abstract":"The sol-gel method was used to synthesize nickel-alumina catalysts with various nickel loadings. Chemical and physical properties of support and supported nickel were characterized by TGA, DTA, EDX, SEM, BET, XRD and TPR techniques. Calcination temperature (500°C) was determined by performing thermogravimetric and differential thermal analysis on the samples. Energy dispersive X-ray (EDX) was used to determine the actual content of nickel on alumina. N 2 adsorption test revealed that the specific surface area varied between 550 and 223 m 2 /g for pure alumina and 30%Ni/Al, respectively. X-ray diffraction patterns showed no peaks due to NiO species and NiO species were well dispersed on the support by formation of NiAl 2 O 4 phase. Temperature-programmed reduction (TPR) indicated that the nickel species mainly presented in NiAl 2 O 4 phase and small amount of NiO. In the 20 percent nickel loading, the surface NiAl 2 O 4 phase, which is between NiO and bulk NiAl 2 O 4 phases in terms reducibility, was formed considering as a successful result. Keywords: Nickel-alumina catalysts; sol-gel method; thermogravimetric analysis; dispersion of NiO; reducibility DOI = 10.3329/cerb.v14i2.5052 Chemical Engineering Research Bulletin 14 (2010) 97-102","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85206321","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: 78
Modeling and simulation of condensed sulfur in catalytic beds of CLAUS process: rapid estimation 克劳斯工艺催化床中凝聚硫的建模与模拟:快速估算
Chemical Engineering Research Bulletin Pub Date : 2010-11-08 DOI: 10.3329/CERB.V14I2.5595
R. Abedini, M. K. Salooki, S. Ghasemian
{"title":"Modeling and simulation of condensed sulfur in catalytic beds of CLAUS process: rapid estimation","authors":"R. Abedini, M. K. Salooki, S. Ghasemian","doi":"10.3329/CERB.V14I2.5595","DOIUrl":"https://doi.org/10.3329/CERB.V14I2.5595","url":null,"abstract":"The Claus process has been known and used in the industry for over 100 years. It involves thermal oxidation of hydrogen sulfide and its reaction with sulfur dioxide to form sulfur and water vapor. This process is equilibrium-limited and usually achieves efficiencies in the range of 94-97%, which have been regarded as acceptable in the past years. First bed operates at the temperature of 573 K, second and third beds operate at 523K and 473K. Outlet of each bed enters the condenser. Operating temperature of each condenser is about 413K which sulfur condenses in them. In this study catalytic bed process of sulfur recovery unit has been mathematically modeled and by MATLAB software simulated, and then output conditions of compounds has been calculated. Keywords: Sulfur recovery; Claus process; catalytic beds; modeling; simulation DOI = 10.3329/cerb.v14i2.5595 Chemical Engineering Research Bulletin 14 (2010) 110-114","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74262855","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: 18
Effect of nitrate ion on corrosion inhibition of mild steel in simulated cooling water 硝酸根离子对模拟冷却水中低碳钢缓蚀性能的影响
Chemical Engineering Research Bulletin Pub Date : 2010-08-28 DOI: 10.3329/CERB.V14I2.4813
S. Karim, C. M. Mustafa, M. Assaduzzaman, Mayeedul Islam
{"title":"Effect of nitrate ion on corrosion inhibition of mild steel in simulated cooling water","authors":"S. Karim, C. M. Mustafa, M. Assaduzzaman, Mayeedul Islam","doi":"10.3329/CERB.V14I2.4813","DOIUrl":"https://doi.org/10.3329/CERB.V14I2.4813","url":null,"abstract":"Corrosion inhibition of mild steel by sodium nitrite in simulated cooling water (SCW) containing chloride ion was investigated. Electrochemical techniques such as corrosion potential (E corr ) measurement and potentiodynamic sweep experiments were used. The experimental parameters were concentration of the inhibitor, pH of the aqueous media and soaking time. Nitrite inhibited mild steel corrosion in near neutral and alkaline (pH 6 and above) SCW and accelerated corrosion in acidic media (pH 4 and below). Inhibition activity increased with the increase of nitrite concentration up to 500 ppm, and afterwards remained more or less constant at pH 6 and above. In stagnant SCW, maximum corrosion inhibition was observed at pH 8 for all concentration of NaNO 2 . Inhibition action of NaNO 2 was found to increase with the increase of soaking time up to 24 hours, and afterwards it remained more or less constant at all nitrite concentrations at and above pH 6. Based on the experimental results, mechanisms of action of NaNO 2 on mild steel corrosion inhibition in SCW have been proposed. Keywords: Corrosion; Potentiodynamic sweep; Inhibitor DOI = 10.3329/cerb.v14i2.4813 Chemical Engineering Research Bulletin 14 (2010) 87-91","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81655088","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: 27
Energy Dissipation and Shear Rate with Geometry of Baffled Surface Aerator 折流板表面增氧机几何形状的能量耗散和剪切速率
Chemical Engineering Research Bulletin Pub Date : 2010-07-28 DOI: 10.3329/CERB.V14I2.4910
B. Kumar
{"title":"Energy Dissipation and Shear Rate with Geometry of Baffled Surface Aerator","authors":"B. Kumar","doi":"10.3329/CERB.V14I2.4910","DOIUrl":"https://doi.org/10.3329/CERB.V14I2.4910","url":null,"abstract":"The geometric parameters of surface aeration systems govern the process phenomena. The dissipation rate of turbulent kinetic energy (e) and shear rate (γ) are the key process parameters for mixing in surface aerators. Present work by doing numerical computation by visimix® analyzes the effect of geometric parameters (impeller diameter, cross-sectional area of the tank, liquid height, width of the baffle, rotor blade length and immersion height) on e and γ. Analysis has been done by making the geometric parameters non-dimensionalized through rotor diameter. With an increase in liquid height and baffled width, there is an increase in the case of energy dissipation and shear rate values. In the case of tank area and blade length, it is vice versa. Energy dissipation and shear rate are not affected by the variation in immersion height of the impeller. Keywords: energy dissipation; mixing; shear rate; surface aerator DOI = 10.3329/cerb.v14i2.4910 Chemical Engineering Research Bulletin 14 (2010) 92-96","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87201022","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: 14
Instantaneous Blood Typing Using Paper Diagnostics 即时血型使用纸诊断
Chemical Engineering Research Bulletin Pub Date : 2010-06-09 DOI: 10.3329/CERB.V14I1.5268
S. Halim
{"title":"Instantaneous Blood Typing Using Paper Diagnostics","authors":"S. Halim","doi":"10.3329/CERB.V14I1.5268","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.5268","url":null,"abstract":"","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83125041","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
Wastewater treatment options for paper mills using recycled paper/imported pulps as raw materials: Bangladesh perspective 以再生纸/进口纸浆为原料的造纸厂的废水处理方案:孟加拉国的观点
Chemical Engineering Research Bulletin Pub Date : 2010-06-06 DOI: 10.3329/CERB.V14I1.5236
Md. Mominur Rahman, Kazi Bayzid Kabir
{"title":"Wastewater treatment options for paper mills using recycled paper/imported pulps as raw materials: Bangladesh perspective","authors":"Md. Mominur Rahman, Kazi Bayzid Kabir","doi":"10.3329/CERB.V14I1.5236","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.5236","url":null,"abstract":"Paper sector in Bangladesh is currently expanding day-by-day to meet the increasing demand of industrial, writing/printing and specialty papers. Paper mills have adverse e\u000bects on the environment by producing huge quantity of wastewater. Yearly, approximately 14 million m 3 wastewater is being discharged to the surface water bodies and irrigated lands without no/limited treatment. Water pollution from pulp and paper mills can be minimized through proper effuent characterization and design of appropriate treatment facilities. In this article di\u000berent techniques of wastewater treatment for paper mills are discussed. Case study based on treatability analysis and jar test for a paper mill producing 200 m 3 /h of effuent is provided. On the basis of the case study a simplified treatment process is proposed. Proper treatment of such mills would not only save our environment but can also be beneficial for the industries by water usage minimization. Keywords: Pulp and paper mills; recycled paper; imported pulp; environmental impact; wastewater characterization; wastewater treatment DOI = 10.3329/cerb.v14i1.5236 Chemical Engineering Research Bulletin 14 (2010) 65-68","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85958587","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
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