Hungarian Journal of Industry and Chemistry最新文献_第4页

Antioxidant Effect of Humic Substances from Hungarian Leonardite 匈牙利Leonardite中腐殖物质的抗氧化作用

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2022-09-27 DOI: 10.33927/hjic-2022-01

A. Csicsor, E. Tombácz

引用次数: 0

Membrane Unit for Integrated Gas Separation – Membrane Bioreactor (GS-MBR) System 用于集成气体分离的膜单元-膜生物反应器（GS-MBR）系统

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2022-09-27 DOI: 10.33927/hjic-2022-04

Z. Pientka, J. Peter, R. Valek

{"title":"Membrane Unit for Integrated Gas Separation – Membrane Bioreactor (GS-MBR) System","authors":"Z. Pientka, J. Peter, R. Valek","doi":"10.33927/hjic-2022-04","DOIUrl":"https://doi.org/10.33927/hjic-2022-04","url":null,"abstract":"One of the research directions of renewable energy sources is the production of biohydrogen from the dark fermentation of organic matter. During this fermentation process, since hydrogen is produced along with a complex mixture of other gases and vapors, hydrogen gas requires further purification. One relatively easy solution to this problem might be the utilization of gas separation membrane modules given their low energy consumption, simple operation and ease of upscaling. In this work, hollow fiber (HF) membranes based on polyetherimide (PEI) were developed and tested. HF membranes were spun from a polymer solution of PEI using the wet phase inversion process into a water bath using a pilot-scale spinning device. Gas transport measurements showed that membranes exhibited permeances of between 9.3 and 19.2 GPU with CO2/H2 selectivities within the range of 3.3 - 5.6. Morphology studies showed regular shapes resembling hollow fibers with outer diameters within the range of 250-320 microns, depending on various parameters of the spinning process. The best performing membranes were selected and a morphological analysis carried out. Selected fibers were incorporated into two types of membrane modules. One type was a laboratory-scale membrane mini-module used for preliminary tests, while the other membrane module was designed for the treatment of larger amounts of biohydrogen. Two types of laboratory-scale membrane separation units were constructed. For laboratory use, the low-pressure unit proved more accurate regulation to match the fermenters performance with the separation unit in comparison with the high-pressure one.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42801438","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

Enzyme Reaction Engineering as a Tool to Investigate the Potential Application of Enzyme Reaction Systems 酶反应工程作为研究酶反应系统潜在应用的工具

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2022-09-27 DOI: 10.33927/hjic-2022-08

Nevena Miličić, Ivana Ćevid, M. M. Çakar, M. Sudar, Z. Blažević

引用次数: 0

Production and Characterization of Sand-Plastic Composite Floor Tiles 砂塑复合地砖的生产与表征

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2022-09-27 DOI: 10.33927/hjic-2022-06

A. Jock, Messiah Luke Akpan, Francis Asokogene Oluwadayo

引用次数: 0

Influence of Mineral Composition in Natural Granite Rocks on Microhardness 天然花岗岩矿物组成对显微硬度的影响

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-11

Eszter Kelemen-Cserta, I. Gyurika

引用次数: 0

Development of Compartment Models for Diagnostic Purposes 用于诊断目的的舱室模型的开发

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-07

B. Tarcsay, Ágnes Bárkányi, T. Chován, S. Németh

{"title":"Development of Compartment Models for Diagnostic Purposes","authors":"B. Tarcsay, Ágnes Bárkányi, T. Chován, S. Németh","doi":"10.33927/hjic-2021-07","DOIUrl":"https://doi.org/10.33927/hjic-2021-07","url":null,"abstract":"The importance of recognizing the presence of process faults and resolving these faults is continuously increasing parallel to the development of industrial processes. Fault detection methods which are both robust and sensitive help to recognize the presence of faults in time to avoid malfunctions, financial loss, environmental damage or loss of human life. In the literature, the use of various model-based fault detection methods has gained a considerable degree of popularity. Methods usually based on black-box models, data-based techniques or models using symbolic logic, e.g. expert systems, have become widespread. White-box models, on the other hand, have been applied less despite their considerable robustness because of multiple reasons. Firstly, their complexity and the relatively vast amount of technological and modelling knowledge needed to construct them for industrial systems. Secondly, their large computational demand which makes them less suitable for online fault detection. In this study, the aim was to resolve these problems by developing a method to simplify the complex Computational Fluid Dynamics models employed to describe the equipment used in the chemical industry into less complex model structures. These simpler structures are Compartment Models, a type of white-box model which breaks down a complex system into smaller units with idealized behaviour. In the case of a small number of compartments, the computational load of such models is not significant, therefore, they can be employed for the purposes of online fault detection while providing an accurate representation of the system. For the purpose of identifying the compartmental structure, fuzzy logic was employed to create a model which approximates the real behaviour of the system as accurately as possible. Our future objective is to explore the possibility of combining this model with various diagnostic methods (expert systems, Bayesian networks, parity relations, etc.) and derive robust tools for the purpose of fault detection.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42535186","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

Optimisation of the Physical Properties of Rice Husk Ash in Ceramic Materials Using the Response Surface Methodology 用响应面法优化稻壳灰分在陶瓷材料中的物理性能

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-04

Asotah Wisdom, U. Mark, Elakhame Zeberu, A. Adeleke

{"title":"Optimisation of the Physical Properties of Rice Husk Ash in Ceramic Materials Using the Response Surface Methodology","authors":"Asotah Wisdom, U. Mark, Elakhame Zeberu, A. Adeleke","doi":"10.33927/hjic-2021-04","DOIUrl":"https://doi.org/10.33927/hjic-2021-04","url":null,"abstract":"Optimisation of the physical properties of rice husk ash (RHA) in ceramic materials was carried out using Response Surface Methodology. The independent variables, namely the firing temperature and residue content, were statistically combined in a Central Composite Design with the effects on water absorption, linear shrinkage, bulk density, apparent porosity and apparent specific gravity determined. Physical and microstructural analyses were carried out to obtain information on the processes that occurred within the ceramic materials. The results obtained were analysed to determine the optimum physical properties of the ceramic materials within the range investigated. The residue content had a significant influence (at 95% confidence level) on the bulk density, water absorption, apparent porosity and apparent specific gravity but not on the linear shrinkage. The firing temperature had a more significant effect on the linear shrinkage than on the residue content, so that when elevated it contributed to an increase in linear shrinkage. The optimum residue content and firing temperature to enhance physical properties within the range investigated were 5.85% RHA and 1029.64°celsius, respectively. These optimal conditions are expected to produce a ceramic material with a bulk density, linear shrinkage, apparent porosity, water absorption and apparent specific gravity of 1.64 g/cm3, 0.29%, 0.29 g/cm3, 18.26% and 2.11, respectively with a composite desirability of 100%.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48046872","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

Comparative Study on Anaerobic Degradation Processes of Pressed Liquid Fraction of Organic Solid Waste 有机固体废物加压液相厌氧降解过程的比较研究

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-05

T. Rózsenberszki, L. Koók, P. Bakonyi, N. Nemestóthy, K. Bélafi-Bakó

引用次数: 2

The Experimental Verification of a Generalized Model of Equivalent Circuits 等效电路广义模型的实验验证

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-01

Z. Lukács, Dávid Baccilieri, T. Kristóf

引用次数: 0

Photocatalytic Degradation of Rhodamine B in Heterogeneous and Homogeneous Systems 多相和均相体系中罗丹明B的光催化降解

IF 0.2

Hungarian Journal of Industry and Chemistry Pub Date : 2021-09-21 DOI: 10.33927/hjic-2021-02

Asfandyar Khan, Zsolt Valicsek, O. Horváth

{"title":"Photocatalytic Degradation of Rhodamine B in Heterogeneous and Homogeneous Systems","authors":"Asfandyar Khan, Zsolt Valicsek, O. Horváth","doi":"10.33927/hjic-2021-02","DOIUrl":"https://doi.org/10.33927/hjic-2021-02","url":null,"abstract":"This study focuses on the photocatalytic degradation of Rhodamine B (RhB) in heterogeneous and homogeneous photo-Fenton reactions. In the heterogeneous system, iron(II) doped copper ferrite CuII(x)FeII(1-x)FeIII2O4 nanoparticles (NPs) prepared in our previous work were employed as potential catalysts. The photodegradation of RhB was carried out in a quartz cuvette located in a diode array spectrometer. The experimental conditions such as pH, NPs dosage and H2O2 dosage with regard to the photocatalytic degradation of RhB were optimized to be 7.5, 500 mg/L and 8.9x10-2 mol/L, respectively. In addition, visible light-induced photodegradation of RhB was also carried out by using ch{H2O2} over a wide pH range in the absence of heterogeneous photocatalysts. It was observed that the reaction rate significantly increased above pH 10, resulting in a faster rate of degradation of RhB, which may be attributed to the deprotonation of hydrogen peroxide. Furthermore, the potential antibacterial property of such catalysts against the Gram-negative bacterium Vibrio fischeri in a bioluminescence assay yielded inhibition activities of more than 60% in all cases.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48576879","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