Journal of Chemical Engineering Research Updates最新文献_第2页

Characterization of Filmogenic/Edible Covering Based on Pectin Extracted from Cajá (Spondias mombin) Applied to Coating Green Acerolas (Malpighia emarginata) 绿针叶树(Malpighia emarginata)涂膜用caj<s:1> (Spondias mombin)提取果胶的生/可食性覆盖物表征

Journal of Chemical Engineering Research Updates Pub Date : 2021-11-28 DOI: 10.15377/2409-983x.2021.08.3

Estéfani Alves Asevedo, Sérgio Dantas de Oliveira Júnior, Everaldo Silvino dos Santos

{"title":"Characterization of Filmogenic/Edible Covering Based on Pectin Extracted from Cajá (Spondias mombin) Applied to Coating Green Acerolas (Malpighia emarginata)","authors":"Estéfani Alves Asevedo, Sérgio Dantas de Oliveira Júnior, Everaldo Silvino dos Santos","doi":"10.15377/2409-983x.2021.08.3","DOIUrl":"https://doi.org/10.15377/2409-983x.2021.08.3","url":null,"abstract":"Filmogenic coatings can be used as a post-harvest strategy to extend shelf life and ensure improvements in fruit quality and safety given their perishable nature. Due to their edibility, the composition of the coverings is a determining factor for their application, and for this reason, it is interesting and desirable that the constituents come from natural sources. The objective of the present study was to develop and characterize a pectin-based film extracted from cajá peel (Spondias mombin) and verify its efficiency as an edible coating in postharvest acerolas (Malpighia emarginata). The film was characterized in terms of mechanical properties by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM); as well as in terms of chemical properties using the analysis of structural bonds by Fourier Transformed Infrared Spectroscopy (FTIR) and X-Ray Diffraction (XRD). In addition, the antimicrobial activity against two bacteria was evaluated. The analyzed film was presented as a dense membrane, with the presence of pores, fissures, and a very rough surface. The degree of esterification of pectin extract from cajá peel was 44%, and for this reason it was classified as low methocxyl (LM) pectin. The filmogenic solution presented antimicrobial activity against the bacteria Pseudomonas aeruginosa and Staphylococcus aureus. The applicability of the edible coating was tested on green acerolas, monitoring their maturation stage through analyzes such as weight loss, titratable acidity, and total soluble solids. At the end of the 7 days of storage, acerolas with the application of the coating showed 8.97% weight loss while acerolas without coating showed 9.89%; the percentage of total soluble solids was 7.68% higher for acerolas with the coating, as well as ascorbic acid content was higher for the protected fruits, indicating that the coverage favored the delay in the maturation of acerolas.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127132072","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

VOC and CO Removals by Perovskite Type Nanocatalysts Supported on Commercial Substrates 钙钛矿型纳米催化剂在商业基质上对VOC和CO的去除

Journal of Chemical Engineering Research Updates Pub Date : 2021-11-15 DOI: 10.15377/2409-983x.2021.08.2

S. Hosseinpour, Mahsa Bahramgour, S. R. Hosseini, Y. Yildirim, A. Niaei

{"title":"VOC and CO Removals by Perovskite Type Nanocatalysts Supported on Commercial Substrates","authors":"S. Hosseinpour, Mahsa Bahramgour, S. R. Hosseini, Y. Yildirim, A. Niaei","doi":"10.15377/2409-983x.2021.08.2","DOIUrl":"https://doi.org/10.15377/2409-983x.2021.08.2","url":null,"abstract":"In this research, it was tried to choose a kind of perovskite catalyst with optimized formulation La0.8Sr0.2Co0.66Fe0.34O3 to remove air pollutants. This perovskite catalyst stabilized on the various supports such as alumina and ZSM-5 with the sol-gel synthesis technique and ceramic monolith by dip-coating method. Four different catalysts by variable weight percentage including PE-Al 10%, PE-Al 20%, PE-Al 30%, and PE-Al 40% were prepared by sol-gel synthesis technique. In this work, the XRD technique was used to confirm the formation of perovskite catalysts’ crystalline phases on the supports. As a result, XRD patterns revealed the formation of the perovskite phase onto the alumina and zeolite supports. Activity tests of these four catalysts were examined in the catalytic oxidation of Toluene and CO using an experimental setup consisting of a tubular flow reactor at the temperature 280-400°C and 100-400°C for the toluene and CO removal systems, respectively. According to the results of the catalysts’ activity test, the alumina supported with 40% w/w perovskite catalyst showed the best performance, and its activity was similar to the activity of the bulk catalyst (over 95% conversion of toluene at about 290°C). For the coated catalysts on a ceramic monolith, the complete removal of carbon monoxide at 50°C was lower than the powdered form. Results from the activity test in a toluene removal system that show coating of the bulk and supported catalysts on ceramic monolith; have an essential impact on the activity test of these catalysts. ","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128066518","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

Investigation of Gas-Solid Flows in a Spout Fluidized Bed on Drag and Solid Stress: CFD-DEM, TFM, and Experimental Validation 基于阻力和固体应力的喷流流化床气固流动研究:CFD-DEM、TFM和实验验证

Journal of Chemical Engineering Research Updates Pub Date : 2021-09-28 DOI: 10.15377/2409-983x.2021.08.1

Guodong Liu, X. Guo, Junnan Zhao, R. Wang, Yurong He

引用次数: 1

A Review of Micellar Enhanced Ultrafiltration Technique in the Removal of Heavy Metals from Aqueous Solutions 胶束强化超滤技术去除水中重金属的研究进展

Journal of Chemical Engineering Research Updates Pub Date : 2020-12-25 DOI: 10.15377/2409-983X.2020.07.5

D. Sahin

引用次数: 0

Particle Size and Particle Size Distribution of Emulsion Polymers: A Review of Modeling Studies 乳液聚合物的粒径和粒径分布:模型研究综述

Journal of Chemical Engineering Research Updates Pub Date : 2020-12-25 DOI: 10.15377/2409-983x.2020.07.3

A. Sood, Tulika Gaur

引用次数: 0

The Effects of the Solvent Choice of the Continuous Phase on the Poly(Urea-Urethane) Microcapsules Properties 连续相溶剂选择对聚脲-氨基甲酸乙酯微胶囊性能的影响

Journal of Chemical Engineering Research Updates Pub Date : 2020-10-25 DOI: 10.15377/2409-983X.2020.07.4

F. Salaün

{"title":"The Effects of the Solvent Choice of the Continuous Phase on the Poly(Urea-Urethane) Microcapsules Properties","authors":"F. Salaün","doi":"10.15377/2409-983X.2020.07.4","DOIUrl":"https://doi.org/10.15377/2409-983X.2020.07.4","url":null,"abstract":"Xylitol, a natural crystalline polyol, presents a cooling effect due to its negative heat of solution at 35 °C supported by humidity absorption, contributing to a fresh sensation when it dissolves. Since this material is sometimes in a liquid state, it cannot be incorporated in or onto a substrate without being protected. One of the strategies to protect the active substance may be forming a barrier layer at its surface, i.e., microencapsulation. The present work is devoted to studying the effect of continuous phase parameters affecting on encapsulation of xylitol with a poly (urea-urethane) shell through a two-step microencapsulation process. The first step is liquid-liquid dispersion either in toluene or Miglyol 812N, and the second step is microencapsulation by interfacial polymerization. The process can be used to control the size distribution of the microparticles, the thickness, and the chemical nature of the shell, which influences the release rate of the active substance. The choice of the continuous phase solvent (toluene or Miglyol 812N) required some changes in the formulation of the system, especially the HLB of the surfactant mixture, to obtain a stable emulsion with a narrow particle size distribution. The thermo-chemical and morphological characteristics of microparticles were studied by Fourier transform-infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), enthalpy of dilution, and scanning electron microscope (SEM). The microparticle size is governed by the emulsion step and the chemical composition of the organic phase. Most of the thermal properties are related to their porous structure and their chemical shell formation during the interfacial polymerization step.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132450888","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

Physically Activated Agricultural Waste Biochars for Production of Pollutant Adsorbents 用于生产污染物吸附剂的物理活化农业废弃物生物炭

Journal of Chemical Engineering Research Updates Pub Date : 2020-10-08 DOI: 10.15377/2409-983x.2020.07.2

D. Vamvuka, EvangelosMachairas, S. Sfakiotakis, O. Pantelaki

{"title":"Physically Activated Agricultural Waste Biochars for Production of Pollutant Adsorbents","authors":"D. Vamvuka, EvangelosMachairas, S. Sfakiotakis, O. Pantelaki","doi":"10.15377/2409-983x.2020.07.2","DOIUrl":"https://doi.org/10.15377/2409-983x.2020.07.2","url":null,"abstract":"Various nut residues from agricultural production were investigated for their potential to be used as active carbons. Raw materials were pyrolyzed in a fixed bed unit and subsequently gasified by steam or carbon dioxide at different temperatures and duration of heat treatment. Biochars were characterized by physical and chemical analyses with respect to temperature and gasifying agents. Organic and mineral matter, elemental composition, structural characteristics, and surface functional groups were determined. Activation by steam presented a higher reactivity than carbon dioxide, reduced the yield of biochars, consumed more oxygen organic functional groups, favoured pore enlargement at high temperature, and increased the specific surface area (maximum 1257 m2/g) of pyrolyzed materials by 1.4 to 3.8 fold. Activation by carbon dioxide disrupted the hydrogen char structure, favoured microporosity, and increased the specific surface area (maximum 637 m2/g) of pyrolyzed materials by 1.8 to 3 fold. Gasified biochars at a high temperature were highly carbonized and exhibited aromatic structures, especially under steam activation.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123229805","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

Basic Economic Analysis for Sonochemical Processes 声化学过程的基本经济分析

Journal of Chemical Engineering Research Updates Pub Date : 2020-09-18 DOI: 10.15377/2409-983x.2020.07.1

C. Pirola

引用次数: 0

Enhancement of Thermophilic Digestion of Food Waste (FW) via Trace Element Supplementation 通过补充微量元素促进食物垃圾的嗜热消化

Journal of Chemical Engineering Research Updates Pub Date : 2019-12-20 DOI: 10.15377/2409-983x.2019.06.2

N. Azbar, K. Arslan, T. Keskin, Duygu Karaalp

{"title":"Enhancement of Thermophilic Digestion of Food Waste (FW) via Trace Element Supplementation","authors":"N. Azbar, K. Arslan, T. Keskin, Duygu Karaalp","doi":"10.15377/2409-983x.2019.06.2","DOIUrl":"https://doi.org/10.15377/2409-983x.2019.06.2","url":null,"abstract":"In this study, the role of trace element (TE) supplementation and performance characteristics of a thermophilic anaerobic digester fed by food wastes (FW) is investigated in the long run, and a representative operational data set for field application is reported over the whole experimental period. Continuous feeding of food wastes with a dry matter of 5% for 150 days was carried out using a 100 L pilot-scale CSTR type anaerobic digester under thermophilic operation conditions. Hydraulic retention time (HRT) and organic loading rate (OLR) were kept around 28 days and less than 3.0 kg oDM m day, respectively. Volumetric biogas production values were reported to be 0.32 m m day during the period where there is no TE supplementation; on the other hand, biogas production was doubled (0.69 mmday) following TE supplementation. This corresponds to an average unit biogas production of 317 and 443 L kg oDM, during TE supplementation and no TE supplementation periods, respectively. Statistical analysis indicated that Co, As, Se, and Al were the most significant trace elements affecting the digester performance.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124824106","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

An Optimization Study of Lipid Extraction from Chlorella minutissima for Biodiesel Production 生物柴油用小球藻油脂提取工艺的优化研究

Journal of Chemical Engineering Research Updates Pub Date : 2019-12-18 DOI: 10.15377/2409-983x.2019.06.1

A. Koçer, B. Inan, D. Özçimen

引用次数: 0