Chemical Engineering Research Bulletin最新文献_第5页

Dynamic modeling and controllability analysis of DME production in an isothermal fixed bed reactor 等温固定床反应器二甲醚生产动力学建模及可控性分析

Chemical Engineering Research Bulletin Pub Date : 2015-04-07 DOI: 10.3329/CERB.V17I1.22917

M. Farsi

引用次数: 3

NEURAL NETWORK PREDICTION OF THE FISCHER-TROPSCH SYNTHESIS OF NATURAL GAS WITH Co (III)/Al2O3 CATALYST Co (III)/Al2O3催化剂下费托合成天然气的神经网络预测

Chemical Engineering Research Bulletin Pub Date : 2015-04-07 DOI: 10.3329/CERB.V17I1.22915

M. Esfandyari, M. Amiri, M. K. Salooki

引用次数: 13

EXPERIMENENTAL STUDY OF THE EFFECT OF ORIFICE INCLINATION ON GAS HOLDUP IN BUBBLE COLUMNS 孔板倾角对气泡塔气含率影响的实验研究

Chemical Engineering Research Bulletin Pub Date : 2015-04-07 DOI: 10.3329/CERB.V17I1.22914

I. Hossain, A. Rakib, Badruddhuza Talukder, H. Hira

{"title":"EXPERIMENENTAL STUDY OF THE EFFECT OF ORIFICE INCLINATION ON GAS HOLDUP IN BUBBLE COLUMNS","authors":"I. Hossain, A. Rakib, Badruddhuza Talukder, H. Hira","doi":"10.3329/CERB.V17I1.22914","DOIUrl":"https://doi.org/10.3329/CERB.V17I1.22914","url":null,"abstract":"Gas holdup in the column section of bubble columns is determined by a large number of operating-design variables-parameters. In this study the effect of orifice inclination on the gas holdup is investigated at various superficial gas velocities. It is observed that the effect depends largely on the gas velocities. At very low gas velocities such as 0.015-0.076 cm/s where truly dispersed-bubble regime prevails, an inclination of the orifice keeping the size unchanged tends to decrease the gas holdup. However this effect diminishes with increasing gas velocity and no remarkable effect is found at relatively higher gas velocities like 2.20-8.50 cm/s where dispersed-transition-coalesced bubble regimes prevail. Therefore when bubble columns are intended to operate at very low superficial gas velocities, the orifice inclination is also an alternative option to control the gas holdup at the desired level. The experimental results produced in this study would be useful for the development and validation of proper mathematical model. DOI: http://dx.doi.org/10.3329/cerb.v17i1.22914 Chemical Engineering Research Bulletin 17(2015) 18-24","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82982588","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

DEVELOPMENT OF ONLINE DATA FILTERING BASED ON KALMAN FILTER 基于卡尔曼滤波的在线数据滤波研究

Chemical Engineering Research Bulletin Pub Date : 2015-04-07 DOI: 10.3329/CERB.V17I1.22913

B. Baloochy, S. Shokri

引用次数: 0

CATEGORICAL ASSESSMENT AND CHARACTERIZATION OF CONVENTIONAL AND UNCONVENTIONAL BIOMASS RESOURCES IN BANGLADESH 孟加拉国常规和非常规生物质资源的分类评估和特征

Chemical Engineering Research Bulletin Pub Date : 2015-04-07 DOI: 10.3329/CERB.V17I1.22910

M. Hossen, Alfi Rahman, A. Kabir, M. Hasan, Shoeb Ahmed

{"title":"CATEGORICAL ASSESSMENT AND CHARACTERIZATION OF CONVENTIONAL AND UNCONVENTIONAL BIOMASS RESOURCES IN BANGLADESH","authors":"M. Hossen, Alfi Rahman, A. Kabir, M. Hasan, Shoeb Ahmed","doi":"10.3329/CERB.V17I1.22910","DOIUrl":"https://doi.org/10.3329/CERB.V17I1.22910","url":null,"abstract":"With the rapid industrial growth, the need for renewable energy sources is rising fast. Being a developing country, Bangladesh aims towards industrial expansion, which is always followed by increased energy consumption. Considering the fact that fossil fuel is not sustainable and biomass sources are abundant and offer more versatility, the latter have become an attractive alternative to petroleum-based products. Moreover, utilization of biomass also seems promising because of biodegradability and lower greenhouse gas emissions, ensuring reduced environmental pollution, a grave concern with fossil-fuel technology. Biomass can range from agricultural byproducts to industrial and municipal wastes, however, very few biomass sources are currently being used in Bangladesh. Moreover, biomass can also be utilized to derive valuable chemicals, which are potential raw materials in several existing industries in Bangladesh. Despite having massive potential in Bangladesh, there haven't been organized studies on feedstock types, quantities, characterization and applications. Here we present an organized study to identify potential biomass sources and their available quantities. Considering specific waste fractions from varying sources, total amount of utilizable biomass resources have been calculated. A categorized proximate analysis data summary of varying biomass is also prepared that can be consulted in the future studies to calculate the theoretical possible production of energy as well as useful bio-chemicals based on efficient bio-processing techniques. This work is intended to benchmark the current efforts, and would add valuable information resources for the ongoing research towards achieving energy-sustainability and energy-security in Bangladesh. DOI: http://dx.doi.org/10.3329/cerb.v17i1.22910 Chemical Engineering Research Bulletin 17(2015) 1-10","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87502719","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

RECYCLING OF MIXED PLASTICS WASTE CONTAINING POLYETHYLENE, POLYVINYLCHLORIDE AND POLYETHYLENE TEREPHTHALATE 回收含聚乙烯、聚氯乙烯和聚对苯二甲酸乙二醇酯的混合塑料废物

Chemical Engineering Research Bulletin Pub Date : 2013-12-29 DOI: 10.3329/CERB.V16I1.17471

G. M. Mamoor, W. Shahid, Amir Mushtaq, U. Amjad, U. Mehmood

{"title":"RECYCLING OF MIXED PLASTICS WASTE CONTAINING POLYETHYLENE, POLYVINYLCHLORIDE AND POLYETHYLENE TEREPHTHALATE","authors":"G. M. Mamoor, W. Shahid, Amir Mushtaq, U. Amjad, U. Mehmood","doi":"10.3329/CERB.V16I1.17471","DOIUrl":"https://doi.org/10.3329/CERB.V16I1.17471","url":null,"abstract":"This research work was undertaken to investigate the spectroscopic, morphological and rheological properties of polymer blends made of recycled Polyethylene terephthalate (PET), Polyethylene (PE) and Polyvinylchloride (PVC). Different blends of these polymers were made by varying composition of PET. Each recycled blend consisted of recycled polymers and ethylene propylene diene monomer (EPDM) as a compatiblizer. Spectroscopic and morphological characteristics of recycled polymer blends were investigated using Fourier Transform Infrared Spectrometer (FTIR) and Scanning Electron Microscope (SEM) respectively. SEM analysis revealed low miscibility among these three polymers. While rheological properties were investigated using Melt Flow Indexer (MFI). The rheological characterization indicated that melt flow index (MFI) decreases with increase of PET concentration in PE/PET/PVC recycled blends. It was also observed that with increase of PET contents recycled blends show pseudoplastic behavior. DOI: http://dx.doi.org/10.3329/cerb.v16i1.17471 Chemical Engineering Research Bulletin 16(2013) 25-32","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73146840","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

Bioethanol Fermentation from Non-Treated and Pretreated Corn Stover using Aspergillus Oryzae 利用米曲霉从未处理和预处理的玉米秸秆发酵生物乙醇

Chemical Engineering Research Bulletin Pub Date : 2013-12-29 DOI: 10.3329/CERB.V16I1.6659

S. M. Hossain

{"title":"Bioethanol Fermentation from Non-Treated and Pretreated Corn Stover using Aspergillus Oryzae","authors":"S. M. Hossain","doi":"10.3329/CERB.V16I1.6659","DOIUrl":"https://doi.org/10.3329/CERB.V16I1.6659","url":null,"abstract":"A comparison was studied for non-treated and pretreated corn stover with dilute alkaline peroxide and dilute acid treatment respectively for bioethanol production by simultaneous saccharification and fermentation (SSF) process in a continuous stirred batch bioreactor using fungi Aspergillus oryzae . The optimum parameters for bioethanol fermentation were: time, 48 h; pH, 6.0; temperature, 50oC; stirring speed, 35 rpm; and corn stover loading, 35 g/L. The maximum concentration of bioethanol at optimum fermentation process parameters were 0.762 g/g, 0.799 g/g and 0.819 g/g for non-treated, dilute acid and dilute alkaline peroxide pretreated corn stover respectively. Maximum yields of bioethanol were 0.399 g/L h, 0.420 g/L.h and 0.431 g/L h of corn stover at optimum parameters for non-treated, dilute acid and dilute alkaline peroxide pretreated corn stover respectively. The sp. growth rate (m) were 5.30 s −1 , 5.54 s −1 , and 5.93 s −1 and maximum sp. growth rate (m max ) were 10.60 s −1 , 11.08 s −1 and 11.86 s −1 using Monod model for non-treated, dilute acid and dilute alkaline peroxide pretreated corn stover respectively. The Monod parameter (K s ) were 33.87 g/L, 34.21 g/L and 34.85 g/L for non-treated, dilute acid and dilute alkaline peroxide pretreated corn stover respectively. The sp. enzyme activity (ν) were 1192 min −1 , 1463 min −1 and 1559 min −1 and maximum sp. growth rate (ν max ) were 2384 min −1 , 2926 min −1 and 3118 min −1 using Michaelis-Menten enzyme kinetic model for non-treated, dilute acid and dilute alkaline peroxide pretreated corn stover respectively. The Michaelis-Menten parameter (K m ) were 34.42 g/L, 34.63 g/L and 34.85 g/L for non-treated, dilute acid and dilute alkaline peroxide pretreated corn stover respectively. The first order rate constants (k) were 0.014 h −1 , 0.016 h −1 and 0.019 h −1 for non-treated, dilute acid and dilute alkaline peroxide pretreated corn stover for continuous stirred batch bioreactor respectively. DOI: http://dx.doi.org/10.3329/cerb.v16i1.6659 Chemical Engineering Research Bulletin 16(2013) 33-44","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76902863","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: 6

RADIATION EFFECT ON MHD STEADY FREE CONVECTION FLOW OF A GAS AT A STRETCHING POROUS SURFACE WITH A UNIFORM FREE STREAM 辐射对均匀自由流拉伸多孔表面气体MHD稳定自由对流的影响

Chemical Engineering Research Bulletin Pub Date : 2013-12-29 DOI: 10.3329/CERB.V16I1.9287

K. Govardhan, S. Renuka, N. Kishan

引用次数: 0

A Robust Approach in Nonlinear Fuzzy Control of Chemical Process 化工过程非线性模糊控制的鲁棒方法

Chemical Engineering Research Bulletin Pub Date : 2013-12-29 DOI: 10.3329/CERB.V16I1.12720

B. Baloochy

引用次数: 1

FIXED-BED ADSORPTION SEPARATION OF XYLENE ISOMERS OVER SIO2/SILICALLITE-1 CORE-SHELL ADSORBENTS 二氧化硅/硅石-1核壳吸附剂对二甲苯异构体的固定床吸附分离

Chemical Engineering Research Bulletin Pub Date : 2013-12-29 DOI: 10.3329/CERB.V16I1.17470

E. A. Khan, A. Rajendran, Z. Lai

{"title":"FIXED-BED ADSORPTION SEPARATION OF XYLENE ISOMERS OVER SIO2/SILICALLITE-1 CORE-SHELL ADSORBENTS","authors":"E. A. Khan, A. Rajendran, Z. Lai","doi":"10.3329/CERB.V16I1.17470","DOIUrl":"https://doi.org/10.3329/CERB.V16I1.17470","url":null,"abstract":"SiO 2 /Silicalite-1 core-shell material has been demonstrated as potential shape selective adsorbent in gas phase separation of p-xylene from a mixture of p/o-xylene isomers. The core-shell composite comprised of large silica core and thin polycrystalline silicalite-1 shell which was synthesized via a self-assembly of silicalite-1 nanocrystals on core silica surface followed by a secondary seeded growth method. The core materials, SiO 2 used in this study has mesoporosity with an average pore diameter of 60A and hence offers no shape selectivity for xylene isomers. However, the shell, silicalite-1 contains rigid pore structures and preferentially adsorbs p-xylene from their isomers mixtures. A series of adsorption fixed bed breakthrough adsorption/desorption experiment was performed to obtain the equilibrium isotherms and adsorption isotherm parameters of xylene isomers. The equilibrium isotherms of xylene isomers follow the Langmuir’s model. A chromatographic adsorption model has been used to describe the fixed-bed breakthrough profiles of xylene isomers. The model has successfully predicted the responses of the binary mixtures of p/o-xylene isomers. The SiO 2 /silicalite-1 core-shell adsorbents have shown para-selectivity as high as 15. DOI: http://dx.doi.org/10.3329/cerb.v16i1.17470 Chemical Engineering Research Bulletin 16(2013) 1-15","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81216567","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: 8