Chemical Industry & Chemical Engineering Quarterly最新文献_第8页

Chemical route for synthesis of citric acid from orange and grape juices 橙汁、葡萄汁合成柠檬酸的化学路线

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq200820025n

B. Naveen, S. Sivamani, Azucena Cuento, S. Pachiyappan

{"title":"Chemical route for synthesis of citric acid from orange and grape juices","authors":"B. Naveen, S. Sivamani, Azucena Cuento, S. Pachiyappan","doi":"10.2298/ciceq200820025n","DOIUrl":"https://doi.org/10.2298/ciceq200820025n","url":null,"abstract":"Citrus fruits contain sufficient citric acid which is a main tricarboxylic acid. The properties of citric acid make it an important additive in various process industries. The aim of this experimental study is to produce citric acid from orange and grape juices. The chemical route for synthesis of citric acid from citrus juices involves three steps: (i) Neutralization to adjust pH (9-11) with 2.8 M NaOH solution, (ii) Addition of CaCl2 solution (40.3-41.1% (w/v)), and (iii) Acidification with H2SO4 solution (1.5-2.3 M) to produce citric acid. In this study, the fruits were peeled, crushed, filtered, neutralized, added CaCl2 solution and acidified to obtain citric acid. The experiments were carried out by varying final pH of solution, concentrations of CaCl2 and H2SO4 solutions maintaining volume constant. A maximum yield of citric acid at 91.1 and 79.8% from orange and grape fruits at optimum final pH of solution, concentrations of CaCl2 and H2SO4 solutions at 10, 40.7% (w/v) and 1.9 M respectively were achieved. Finally, the purified citric acid crystals were characterized using FTIR and XRD. Thus, it could be concluded that orange fruit would be a promising source for the production of citric acid than grape.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68461396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal dissolution and viscoelastic behavior of polyamide-66 in formic acid for membrane fabrication 聚酰胺-66在甲酸中的最佳溶解及粘弹性性能

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq210320032a

Abulhassan Ali, K. Maqsood, A. Abdulrahman, A. Alsaadi, Abdullah Mahfouz Bin

引用次数: 2

Dyeing of polyester fibers with sulfur- and nitrogen-containing anthraquinone derivatives 含硫和含氮蒽醌衍生物对聚酯纤维的染色

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/CICEQ210125015D

Nahide Deniz Gulsah, C. Sayil, E. Öner, O. Atak, M. Stasevych

引用次数: 0

Thermal performance evaluation of hot oils and nanofluids by simulation of an indirect heating plant 间接供热装置热油和纳米流体热性能模拟研究

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq191011023o

Li Da, S. Mattedi

{"title":"Thermal performance evaluation of hot oils and nanofluids by simulation of an indirect heating plant","authors":"Li Da, S. Mattedi","doi":"10.2298/ciceq191011023o","DOIUrl":"https://doi.org/10.2298/ciceq191011023o","url":null,"abstract":"This paper aims to analyze the thermal performance of four different heat transfer fluids in a hot oil system located in a paraffin hydrotreatment and fractionation plant of a petroleum refinery. The software Petro-SIM? (KBC- -Yokogawa) was employed to elaborate steady-state simulations intended to compare the heat transfer fluid currently used (eutectic of biphenyl and diphenyl oxide) and three fluids proposed as substitutes: paraffin oil (namely n-C13 +) produced in the same industrial unit, a nanofluid of eutectic of biphenyl and diphenyl oxide and copper at a 6% volume fraction, and a CuO/polydimethylsiloxane nanofluid at a 6% volume fraction. The results showed that n-C13 + was the only heat transfer fluid that could replace the eutectic diphenyl oxide/biphenyl in the system under analysis since it absorbed the heat duty of 13.79 Gcal/h, which exceeded the thermal energy of 10.57 Gcal/h absorbed by the heat transfer fluid currently used at the same operating parameters. The Cu/eutectic of biphenyl and diphenyl oxide and CuO/polydimethylsiloxane nanofluids presented lower heat duty than the energy needed for the operation of the hot oil system, which was 8.31 and 8.51 Gcal/h, respectively.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68459820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Xanthomonas campestris biocontrol agent: Selection, medium formulation and bioprocess kinetic analysis 油菜黄单胞菌生物防治剂的选择、培养基配方及生物动力学分析

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq200508032g

J. Grahovac, Ivana Pajčin, Vanja Vlajkov, Z. Rončević, J. Dodić, D. Cvetković, A. Jokić

{"title":"Xanthomonas campestris biocontrol agent: Selection, medium formulation and bioprocess kinetic analysis","authors":"J. Grahovac, Ivana Pajčin, Vanja Vlajkov, Z. Rončević, J. Dodić, D. Cvetković, A. Jokić","doi":"10.2298/ciceq200508032g","DOIUrl":"https://doi.org/10.2298/ciceq200508032g","url":null,"abstract":"Black rot, caused by Xanthomonas campestris pv. campestris, is one of the most important diseases of cruciferous crops which causes significant yield losses. Biological control of black rot by microbial biocontrol agents represents a promising alternative to chemical treatments and good agricultural practices which show only limited success. This study was carried out to assess a potential of different antagonists, including Bacillus, Pseudomonas, Lactobacillus, Streptomyces, Saccharomyces and Trichoderma genera, for biological control of black rot. Cultivation broth samples and their filtrates were examined against seven X. campestris strains, isolated from diseased cruciferous plants, using the diffusion-disc method. Bacillus velezensis has showed the highest inhibition zone diameter of 35.62?3.76 mm. Afterwards, different combinations of carbon and nitrogen sources were used in the cultivation medium to maximize antagonistic activity of B. velezensis. The best combinations were glycerol and yeast extract, lactose and peptone, as well as sucrose and yeast extract, suggesting the potential of biodiesel, dairy and sugar industry effluents in the production of bioactive compounds effective against the black rot pathogen. The validation experiment was performed in a laboratory-scale bioreactor, in order to investigate bioprocess kinetics of biomass growth and carbon source consumption, using the cultivation medium containing the optimal carbon and nitrogen source.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68460535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Comparison of corrosion behaviour of copper and copper alloys in aqueous chloride solution 铜和铜合金在氯化物水溶液中的腐蚀行为比较

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/CICEQ200701007G

S. Gudić, L. Vrsalović, A. Radeljić, E. O. Emeka, I. Ivanić, S. Kožuh, M. Gojić

{"title":"Comparison of corrosion behaviour of copper and copper alloys in aqueous chloride solution","authors":"S. Gudić, L. Vrsalović, A. Radeljić, E. O. Emeka, I. Ivanić, S. Kožuh, M. Gojić","doi":"10.2298/CICEQ200701007G","DOIUrl":"https://doi.org/10.2298/CICEQ200701007G","url":null,"abstract":"A comparative corrosion study of Cu and Cu-Al, Cu-Al-Ni, Cu-Al-Mn, and Cu-Al-Mn-Ni in 0.5 mol dm-3 NaCl solution was performed using an open circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy measurements (EIS). Scanning electron microscopy/Energy-dispersive X-ray spectroscopy (SEM/EDS) analysis was used to evaluate corrosive damage on the sample surface after polarization measurements. The reported results suggest that the alloying elements have reduced cathodic and anodic current densities in the Tafel region, increased anodic currents at higher anodic potentials, and slightly displaced corrosion potential towards more positive values. Overall, impedance increases in the following order: Cu < Cu-Al < Cu-Al-Ni < Cu-Al-Mn < Cu-Al-Mn-Ni. This indicates that Cu alloys possess better corrosion resistance. SEM and EDS analysis after polarization measurements showed uniform dissolution of pure Cu, as well as the presence of a surface oxide layer, consisting of a mixture of the corresponding alloying elements, on all investigated alloys. Aggressive anodic polarization severely damaged the barrier layers on the Cu alloy specimens.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68461326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Performance study of electrochemical micromachining using square composite electrode for copper 方形复合电极电解微加工铜的性能研究

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq210501036a

T. Arul, Varatharaju Perumal, R. Thanigaivelan

{"title":"Performance study of electrochemical micromachining using square composite electrode for copper","authors":"T. Arul, Varatharaju Perumal, R. Thanigaivelan","doi":"10.2298/ciceq210501036a","DOIUrl":"https://doi.org/10.2298/ciceq210501036a","url":null,"abstract":"The use of micro components is increasing day by day in the industries such as aviation, power circuit boards, inkjet nozzle and biomedical. Among various non-traditional micromachining methods, electrochemical micromachining (EMM) shows unique characteristics such as no tool wear, no residual stress and high accuracy. In this research EMM is considered to study the effect of square shaped stainless steel (SS) and aluminum metal matrix composite (AMC) tool on square hole generation. The significant process parameters such as machining voltage, duty cycle and aqueous sodium nitrate (NaNO3) electrolyte of varying concentration is considered for the study. The performances of EMM process are evaluated in terms of machining rate (MR) and Overcut (OC). The AMC tool shows 43.22 % lesser OC than the SS tool at the parameter combinations of 8V, 85% and 23 g/l. Also, for the same parameter combination MR for SS tool is 71.6 % higher than the AMC tool. Field emission scanning electron microscope image (FESEM) analysis shows that the micro square hole generated using composite electrode shows micro-pits on the circumference of the square hole. The energy dispersive X-ray spectroscopy (EDAX) analysis is conducted to verify presence and distributions of reinforcement in AMC tool.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of yeast extract enrichment on fermentative activity of Saccharomyces cerevisiae and technological properties of spelt bread 酵母浸膏富集对酿酒酵母发酵活性及斯佩尔面包工艺性能的影响

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/CICEQ200915016V

V. Vučurović, Vesna Radovanović, J. Filipović, V. Filipović, M. Košutić, N. Novković, V. Radojević

{"title":"Influence of yeast extract enrichment on fermentative activity of Saccharomyces cerevisiae and technological properties of spelt bread","authors":"V. Vučurović, Vesna Radovanović, J. Filipović, V. Filipović, M. Košutić, N. Novković, V. Radojević","doi":"10.2298/CICEQ200915016V","DOIUrl":"https://doi.org/10.2298/CICEQ200915016V","url":null,"abstract":"Considerable interest in the consumption of bread from ancient spelt wheat with superior nutritional properties, easy digestibility and pleasant taste and aroma, has arisen recently. Yeast extract (YE) is nowadays frequently used as natural flavor enhancer for improving organoleptic properties such as meaty, cheesy and savory attributes of different food products. YE is a natural product from baker?s yeast industry with high nutritional richness containing amino acids, peptides, nucleotides, vitamins and minerals. In this work the effect of YE, table salt and white sugar content on fermentative activity of yeast and technological properties of spelt bread was investigated by response surface methodology (RSM) aiming to define the optimal conditions for obtaining a new functional product. The addition of YE, salt and white sugar slightly decreased yeast fermentative activity, while CO2 retention in dough was found to depend more on its chemical composition. YE addition (up to 5%) was found to increase volume and decrease firmness of bread prepared from dough with sugar content up to 5%, while the opposite effect was established in bread with higher sugar content. Maximal bread elasticity was obtained for YE content of 1.57%, table salt content of 2.01% and sugar content of 7.15%.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"95 1","pages":"16-16"},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78181111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The impact of enological products for tartaric stabilization on wine filterability 酒石稳定的酿酒产品对葡萄酒过滤性能的影响

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/CICEQ200913003P

V. Puškaš, U. Miljić, V. Vučurović

{"title":"The impact of enological products for tartaric stabilization on wine filterability","authors":"V. Puškaš, U. Miljić, V. Vučurović","doi":"10.2298/CICEQ200913003P","DOIUrl":"https://doi.org/10.2298/CICEQ200913003P","url":null,"abstract":"The aim of this research was to evaluate the impact of most commonly used agents for tartaric stabilization of wine, such as metatartaric acid, carboxymethyl cellulose (CMC), mannoproteins and gum arabic, on the filterability of white, rose and red wine previously pre-filtered and prepared for the final filtration and bottling. Wine filterability after sweetening with rectified concentrated must was also assessed. The experiments were carried out using Quality Filterability Test and the obtained results were expressed through filterability index (FI), and maximum filterable volume (Vmax). The results confirmed that used enological agents for the inhibition of tartaric instabilities generally did not worsen the filterability of white and rose wine (FI<20). However, it was evident that products containing mannoproteins and metatartaric acid considerably reduced red wine filterability (FI>500). The correlation between white and rose wine turbidity and filterability was recorded in the trials but the same trend was not registered for the red wine. The results of this study are important since membrane (final) filtration of improperly prepared wine characterized by low filterability can both increase the costs and lead to hold up on the bottling line.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68461377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two phase leaching for metal recovery from waste printed circuit boards: Statistical optimization 从废弃印刷电路板中回收金属的两相浸出:统计优化

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/CICEQ210115022M

Manikkampatty Murugesan Palanisamy, K. Kandasamy, Venkata Myneni Ratnam

引用次数: 3