Chemical Engineering Research Bulletin最新文献_第6页

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":"25 1","pages":"97-102"},"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

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":"1 1","pages":"87-91"},"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

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":"3 1","pages":"65-68"},"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

Biofiltration kinetics of ethylacetate and xylene using sugarcane bagasse based biofilter 蔗渣基生物滤池对乙酸乙酯和二甲苯的生物过滤动力学

Chemical Engineering Research Bulletin Pub Date : 2010-05-28 DOI: 10.3329/CERB.V14I1.4683

S. Viswanathan, R. Manivasagam, R. Natarajan

{"title":"Biofiltration kinetics of ethylacetate and xylene using sugarcane bagasse based biofilter","authors":"S. Viswanathan, R. Manivasagam, R. Natarajan","doi":"10.3329/CERB.V14I1.4683","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.4683","url":null,"abstract":"Biodegradation kinetic behaviors of ethyl acetate and xylene in a sugarcane bagasse biofilter were investigated. Microbial growth rate, biochemical reaction rate and kinetic analysis were inhibited at higher inlet concentration. For the microbial growth process, the microbial growth rate of ethyl acetate was greater than that of xylene in the inlet concentration range of 0.2 - 1.2 g.m- 3 . The degree of inhibitive effect was almost the same for ethyl acetate and xylene in this concentration range. The half-saturation constant Ks values of ethyl acetate and xylene were 1.8489 and 1.784 g.m -3 , respectively. The maximum reaction rate V m values of ethyl acetate and xylene were 0.8073and 0.8438 g C h -1 kg -1 packed material, respectively at a concentration of 0.2 g.m -3 . For the biochemical reaction process, the biochemical reaction rate of ethyl acetate was greater than that of xylene in the inlet concentration range of 0.2 - 1.2 g.m -3 . The inhibitive effect for ethyl acetate was more pronounced than that for 0.2 - 1.2 g.m -3 in this concentration range. The EAX concentration profiles along the depth were also determined by using diffusion reaction model. It was observed that at low concentration and low flow rate, the model is in good agreement with the experimental values for ethylacetate and xylene. Keywords: Xylene, ethyl acetate, sugarcane bagasse, biofilter, biochemical reaction DOI = 10.3329/cerb.v14i1.4683 Chemical Engineering Research Bulletin 14 (2010) 51-57","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"18 1","pages":"51-57"},"PeriodicalIF":0.0,"publicationDate":"2010-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81535996","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: 11

Treatment of Textile Wastewater with Chlorine: An Effective Method 氯处理纺织废水的一种有效方法

Chemical Engineering Research Bulletin Pub Date : 2010-05-25 DOI: 10.3329/CERB.V14I1.3206

A. Quader

引用次数: 19

Diagnosis of Process Nonlinearities and Valve stiction: Data Driven Approaches By M.A.A. Shoukat Choudhury, Sirish L. Shah, Nina F. Thornhill (Springer-Verlag, ISBN: 978-3-540-79223-9, 2008) 过程非线性和阀杆的诊断:数据驱动方法，作者:M.A.A. Shoukat Choudhury, Sirish L. Shah, Nina F. Thornhill (Springer-Verlag, ISBN: 978-3-540-79223- 9,2008)

Chemical Engineering Research Bulletin Pub Date : 2010-05-25 DOI: 10.3329/CERB.V14I1.5048

Kamrul Hasan

引用次数: 18

Effect of preservatives on extending the shelf-life of Rasogolla 防腐剂对罗汉果保鲜期的影响

Chemical Engineering Research Bulletin Pub Date : 2010-05-24 DOI: 10.3329/CERB.V14I1.3940

D. Das, Md Alauddin, M. Rahman, K. Nath, Md. Rokonuzzaman Rokonuzzaman

{"title":"Effect of preservatives on extending the shelf-life of Rasogolla","authors":"D. Das, Md Alauddin, M. Rahman, K. Nath, Md. Rokonuzzaman Rokonuzzaman","doi":"10.3329/CERB.V14I1.3940","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.3940","url":null,"abstract":"The study aims, to find out an effective preservative to extend the shelf-life of Rasogolla, a highly popular Bengal sweetmeat achieving the highest worth in all social and religious festivals in Bangladesh due to its special appeal of taste, as well as to assess the effect of preservative on its biochemical and microbial status. Rasogolla available in local market survives for too a short span (2-3days) to export in abroad since its processing and preservation still lie at a very infantile stage. In this research, Rasogolla was prepared in laboratory using calcium propionate, sodium metabisulfite, sorbic acid, sodium diacetate, sodium propionate, acetic acid, benzoic acid, sodium benzoate, butylated hydroxytoluene, butylated hydroxyanisole, P-4-hydroxybenzoate as preservatives followed by a comparative study on the biochemical and microbial status of both market and laboratory made Rasogolla. Sorbic acid and sodium metabisulfite exerted the highest effectiveness in extending Rasogolla’s shelf-life for 24 and 15 days, respectively, whereas the combination of sorbic acid (0.1%) and sodium metabisulfite (0.1%) was found more effective than their individual uses rendering the longer keeping ability up to 30 days ensuring color, flavor, taste and texture. Compositional analysis showed that total solid, moisture, fat, protein, carbohydrate and ash content of market Rasogolla were 75.87-83.17%, 16.83-24.13%, 2.86-4.31%, 5.2-7.94%, 64.26-73.30% and 0.30-0.61%, respectively, whereas those in laboratory made were 73.70-79.83%, 20.17-26.30%, 3.18-6.09% 6.9-8.59%, 61.18-65.25% and 0.30-0.61%, respectively. Market Rasogolla were found more susceptible for microbial growth and contamination than that prepared in laboratory. Keywords: Rasogolla, Preservative, Sorbic acid, Channa, Na-metabisulfite DOI = 10.3329/cerb.v14i1.3940 Chemical Engineering Research Bulletin 14 (2010) 19-24","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"66 1","pages":"19-24"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73818387","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

Chemical Analysis and Comparison of Ordinary Portland Cement of Khyber Pakhtoon Khwa Pakistan 巴基斯坦开伯尔-普赫图恩普通硅酸盐水泥的化学分析与比较

Chemical Engineering Research Bulletin Pub Date : 2010-05-19 DOI: 10.3329/CERB.V14I1.4320

N. Amin, Khurshid Ali

引用次数: 10

Study of the Physical Parameters of Ordinary Portland Cement of Khyber Pakhtoon Khwa Pakistan and their comparison with Pakistan standard Specifications 巴基斯坦开伯尔-普赫图省普通硅酸盐水泥物理参数的研究及其与巴基斯坦标准规格的比较

Chemical Engineering Research Bulletin Pub Date : 2010-05-19 DOI: 10.3329/CERB.V14I1.3729

N. Amin

引用次数: 4