Separation of Gases by Nanoporous Ceramics

2012 ◽  
Vol 7 (2) ◽  
pp. 39-42
Author(s):  
Vladimir Lysenko ◽  
Dmitriy Trufanov ◽  
Sergey Bardakhanov
Keyword(s):  
Electron Beam ◽  
Specific Surface ◽  
Separation Factor ◽  
Open Porosity ◽  
New Technology ◽  
Raw Material ◽  
Surface Porosity ◽  
Separation Of Gases ◽  
Silica Nanopowder

On basis of silica nanopowder «tarkosil» (produced by the authors through new technology of raw material evaporation by electron beam), the nanoporous ceramics with open porosity were used, and its separation properties were studied. For the ceramics, obtained at different sintering temperatures, their specific surface, porosity, and separation factor were determined. The obtained ceramics were applied for separation of four combinations of gases: He/Ar, He/N2, He/CH4, and N2/Ar. The possibility (using the created by the authors ceramics) of helium enrichment his mixtures with more heavy gases was shown

Concept of Full Surface at Syntesis and Application of Silica Nanopowder

2014 ◽  
Vol 9 (4) ◽  
pp. 80-88
Author(s):  
Alexey Zavialov ◽  
Konstantin Zobov ◽  
Vyacheslav Syzrantsev ◽  
Sergey Bardakhanov
Keyword(s):  
Electron Beam ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Theoretical Models ◽  
Electron Beam Evaporation ◽  
Synthesis Process ◽  
Nano Silica ◽  
Silica Nanopowder ◽  
Main Factor

The paper describes a model of synthesis and analysis of the application of nano-silica obtained by electron beam evaporation. The authors developed the approach that shows of the specific and fully surfaces of nanopowders to have more significance then the size of the nanoparticles. The experimental results and theoretical models supporting this concept are presented. In particular, the connection between the strength of the epoxy and the total surface value dispersed into epoxy is shown. In the synthesis of large quantities of nanopowder we can use the model concepts to predict specific surface directly from the averaged parameters of synthesis. The main factor for a used synthesis scheme is presented: the multiplication a product of mass performance on specific surface area. The combination of this factor with the model representations of specific surface evaluation allows to estimate the quality and efficiency of the synthesis process. The nanopowder total surface versatility as a criterion of comparability of different modes, and possibly synthesis processes is shown

The effect of phase transformations in the process of electrom-beam 3D-printing and post-built heat treatment on the peculiarities of plastic deformation and fracture of high nitrogen Cr-Mn steel

2021 ◽  
pp. 10-17
Author(s):  
E.G. Astafurova ◽  
◽  
K.A. Reunova ◽  
S.V. Astafurov ◽  
M.Yu. Panchenko ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Plastic Deformation ◽  
Electron Beam ◽  
Phase Composition ◽  
Additive Manufacturing ◽  
3D Printing ◽  
Raw Material ◽  
High Nitrogen ◽  
Two Phase ◽  
Deformation And Fracture

We investigated the phase composition, plastic deformation and fracture micromechanisms of Fe-(25-26)Cr-(5-12)Mn-0.15C-0.55N (wt. %) high-nitrogen chromium-manganese steel. Obtained by the method of electron-beam 3D-printing (additive manufacturing) and subjected to a heat treatment (at a temperature of 1150°C following by quenching). To establish the effect of the electron-beam 3D-printing process on the phase composition, microstructure and mechanical properties of high-nitrogen steel, a comparison was made with the data for Fe-21Cr-22Mn-0.15C-0.53N austenitic steel (wt. %) obtained by traditional methods (casting and heat treatment) and used as a raw material for additive manufacturing. It was experimentally established that in the specimens obtained by additive manufacturing method, depletion of the steel composition by manganese in the electron-beam 3D-printing and post-built heat treatment contributes to the formation of a macroscopically and microscopically inhomogeneous two-phase structure. In the steel specimens, macroscopic regions of irregular shape with large ferrite grains or a two-phase austenite-ferrite structure (microscopic inhomogeneity) were observed. Despite the change in the concentration of the basic elements (chromium and manganese) in additive manufacturing, a high concentration of interstitial atoms (nitrogen and carbon) remains in steel. This contributes to the macroscopically heterogeneous distribution of interstitial atoms in the specimens - the formation of a supersaturated interstitial solid solution in the austenitic regions due to the low solubility of nitrogen and carbon in the ferrite regions. This inhomogeneous heterophase (ferrite-austenite) structure has high strength properties, good ductility and work hardening, which are close to those of the specimens of the initial high-nitrogen austenitic steel used as the raw material for additive manufacturing.

The Experimental Study on Grinding Properties of Gas Quenching Steel Slag

2011 ◽  
Vol 189-193 ◽  
pp. 612-617
Author(s):  
Hong Wei Xing ◽  
Yue Long ◽  
Xiu Li ◽  
Gao Liang Li ◽  
Yu Zhu Zhang ◽  
...  
Keyword(s):  
Specific Surface ◽  
New Technology ◽  
Steel Slag ◽  
Economic Benefits ◽  
Surface Areas ◽  
Mineral Phases ◽  
Quenching Process ◽  
Gas Quenching ◽  
Specific Surface Areas ◽  
Better Than

A gas quenching process to deal with steel slag and its characteristics of the new technology was briefly introduced. The grinding characteristics, mineral phases of gas quenching steel slag and the potential economic benefits of using it as cement mixing material was studied by compared to heat-stew steel slag. The results indicated that the specific surface areas (S) and grinding times (t) of the gas quenching steel slag showed a first order exponential decay relationship. With the extension of time, the specific surface areas of heat-stew steel slag was tending to balance earlier than that of gas quenching steel slag; The energy consumption of gas quenching steel slag was much lower than that of heat-stew steel slag. Gas quenching steel slag was comprised of C2S, C3S, a certain amount of (Ca2(Al, Fe)2O5）and RO phase, but the content of RO phase was relatively low, which increased the grindability of the quenching steel slag, so that the grindability of gas quenching steel slag was much better than that of heat-stew steel slag. Gas quenching steel slag prepared for cement addictives would bring great economic benefits.

scholarly journals Efektywność produkcji FAME na podstawie wymagań normy ISO 14045:2012

Nafta-Gaz ◽  
2021 ◽  
Vol 77 (3) ◽  
pp. 208-214
Author(s):  
Michał Pajda ◽  
◽  
Wojciech Mazela ◽  
Keyword(s):  
Natural Environment ◽  
New Technologies ◽  
Negative Impact ◽  
New Technology ◽  
Methyl Esters ◽  
Production Costs ◽  
Raw Material ◽  
Energy Materials ◽  
The Impact ◽  
Selection Of

The aim of the work was to present the issue of eco-efficiency, based on the PN-EN ISO 14045:2012 standard in relation to the production of fatty acid methyl esters (FAME). The ecoefficiency analysis takes into account economic and environmental aspects in the improvement of products and processes / technologies. Eco-efficiency considers the product and technology throughout the life cycle, from the construction phase, through use to decommissioning. The impact on the natural environment is assessed on the basis of: consumption of energy, materials, dust and gas emissions, waste and sewage. Total costs include: production costs, raw material costs, costs during the use phase including maintenance, repair and operating costs, product disposal or recycling. The eco-efficiency analysis is helpful in making decisions regarding the selection of a new product or designing a new technology, and enables the selection of the variant that is the most economical and has the least possible impact on the natural environment. These issues are particularly important in the case of biofuels. The rapid growth of their production and the European Union’s policy, which aims to increase the share of energy from renewable sources, cause concerns of many experts regarding the threats related to the production of biofuels, both for the environment and food security. In particular, efforts are made to minimize the amount of waste and residues by implementing the idea of a circular economy. This approach promotes the development of new technologies that are more environmentally friendly. Due to the regulations set out in the RED and RED II Directives, there is a chance that the biofuels will have a less negative impact on the environment. This results from the obligation to certify compliance with the sustainability criteria, which is carried out by voluntary systems recognized by the European Commission, such as the KZR INiG System.

Synthesis of Lanthanum Oxide Using Lanthanum Chloride by Hydrogen-Oxygen Flame Pyrolysis Route

2014 ◽  
Vol 633-634 ◽  
pp. 499-503 ◽  
Author(s):  
Shou Feng Xue ◽  
Wen Yuan Wu ◽  
Xue Bian ◽  
Zhen Feng Wang ◽  
Zhi Ren Yang
Keyword(s):  
Rare Earth ◽  
Lanthanum Oxide ◽  
New Technology ◽  
Air Pollutant ◽  
Lanthanum Chloride ◽  
Raw Material ◽  
Rare Earth Compound ◽  
Roasting Process ◽  
Hydrogen Flame ◽  
Water Pollutant

Nowadays, people should pay more attention on the environment problems that had advent along with the development of rare earth metallurgy industry. A large number of water pollutant, air pollutant and solid pollutant were discharged in the process of synthesis of rare earth compound by precipitation and roasting process. In order to solve the industry pollution problems, a new technology route was developed for the preparation of lanthanum oxide using lanthanum chloride as raw material by oxy-hydrogen flame route. The experiment results showed that lanthanum chloride could directly convert to lanthanum oxide under high temperature by the combustion of mixture gas of hydrogen-oxygen that provided by oxy-hydrogen generator continuously. The phase composition of obtained product was characterized by XRD and the conversion rate of lanthanum chloride and the reaction mechanism were discussed.

scholarly journals Fermented drinks of HippophaeRhamnoides as a way of innovative development of agriculture in Altai region

2020 ◽  
Vol 176 ◽  
pp. 01013
Author(s):  
Evgeny Rozhnov ◽  
Marina Schkolnikova ◽  
Vladimir Popov
Keyword(s):  
Dairy Products ◽  
Culture Medium ◽  
Raw Materials ◽  
New Technology ◽  
Sea Buckthorn ◽  
Raw Material ◽  
Biosynthetic Activity ◽  
Horticultural Crop ◽  
Industrial Processing ◽  
Ascorbic Acids

One of the technological innovations nowadays is the development of industrial processing of agricultural raw material, manufacturing process leading to lower risks – «Low/No/Reduced» and «Better-for-you». This may be done by light processing of raw materials and use of traditional technologies, i.e. fermentation of craft beverages by natural symbiotic cultures Oryzamycesindichiand Medusomycesgisevi (kombucha). The recent years saw a worldwide interest to a horticultural crop called Hippophaerhamnoides (sea-buckthorn) as it is eco-friendly and healthful. Its fruits have a special smell and taste, are reach in carotene, carotenoids, tocopherols, ascorbic acids, polyphenols. The composition is the reason why it is used for foodstuff, i.e. pastry, dairy products, unclarified juice. Production of beverages fermented by natural symbiotic cultures and local orchard products is a new direction in Russia. The supplies are limited which means that the research is relevant. The aim of the research is to study the possibility of usage ofjuice of Hippophaerhamnoides fruits in the new technology of soft drinks production fermented by Oryzamycesindichi and Medusomycesgisevi. A single nutritious substrate for Oryzamycesindichi and Medusomycesgisevi symbiotic cultures cultivation was proved impossible to be produced. Still the possibility to replace polyphenols of the Medusomycesgisevi by those of the sea-buckthorn juice must be analyzed.Sea-buckthorn juice added in a culture medium fermented by Oryzamycesindichi and Medusomycesgisevi symbiotic cultures increases biosynthetic activity of acidforming bacteria. This tangibly improves organoleptic properties of the fermented soft beverages produced. Besides, the technology of Oryzamycesindichi and Medusomycesgisevi production presupposes no clarification which makes the process of the Hippophaerhamnoides use significantly easier. The research helped to identify that the sea-buckthorn juice used in a must fermented by Medusomycesgisevi has many advantages. Namely more comprehensive utilization of carbohydrate, a higher level of reduction of organic acids, and decrease of the time of technological process (24 hours less).

Technology and Mechanism of Valuable Metal Recovery from Pyrite Cinder by Chloridizing Roasting

2012 ◽  
Vol 588-589 ◽  
pp. 1671-1676
Author(s):  
Shao Jun Bai ◽  
Shu Ming Wen ◽  
Qi Cheng Feng ◽  
Yu Chen ◽  
Jian Liu
Keyword(s):  
Steel Industry ◽  
New Technology ◽  
Metal Recovery ◽  
Raw Material ◽  
Pyrite Cinder ◽  
Valuable Metal ◽  
Zinc Compounds ◽  
Lead And Zinc ◽  
Chinese Steel Industry ◽  
Iron Bearing

A new technology of pellet production-drying-chloridizing roasting is proposed for valuable metal recovery from pyrite cinder with high content of lead and zinc. The pyrite cinder, containing 60.15% Fe, 2.02% Pb and 2.15% Zn, was pelletized with addition of 2% bentonite in pan pelletizer. Green balls after drying were roasting at 1100 °C for 60 min with 5 wt % of CaCl2 addition in tube furnace. The results demonstrate that pellets with 61.58% of TFe, lead and zinc volatile ratios of 98.02% and 96.83% were obtained. Key technique is that CaCl2 reacts with lead and zinc compounds and the chloride can be volatilized at moderate temperatures. This new technology can recover the valuable metal fully from pyrite cinder and produce qualified concentrate as iron-bearing feed for steel industry, which will help to solve the pollution of pyrite cinder and extend raw material sourcing for Chinese steel industry.

3D hierarchical porous amidoxime fibers speed up uranium extraction from seawater

2019 ◽  
Vol 12 (6) ◽  
pp. 1979-1988 ◽  
Author(s):  
Xiao Xu ◽  
Hongjun Zhang ◽  
Junxuan Ao ◽  
Lu Xu ◽  
Xiyan Liu ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Nuclear Fuel ◽  
Specific Surface Area ◽  
New Technology ◽  
High Specific Surface Area ◽  
Fuel Production ◽  
Uranium Extraction ◽  
Hierarchical Porous ◽  
Speed Up

The development of high specific surface area amidoxime-based polymeric (H-ABP) fibers presents a new technology for the synthesis of highly efficient adsorbents for uranium extraction from seawater (UES), thus opening a whole new means of nuclear fuel production from the ocean.

scholarly journals Effect of surface roughness on ultrasonic inspection of electron beam melting ti‐6AL‐4V

2019 ◽  
Vol 3 (2) ◽  
pp. 131-141
Author(s):  
Evan Hanks ◽  
Anthony Palazotto ◽  
David Liu
Keyword(s):  
Surface Roughness ◽  
Electron Beam ◽  
New Technology ◽  
High Surface ◽  
Ultrasonic Inspection ◽  
Ultrasonic Waves ◽  
Aviation Industry ◽  
Sound Waves ◽  
Machined Surface ◽  
Content Type

Purpose Experimental research was conducted on the effects of surface roughness on ultrasonic non-destructive testing of electron beam melted (EBM) additively manufactured Ti-6Al-4V. Additive manufacturing (AM) is a developing technology with many potential benefits, but certain challenges posed by its use require further research before AM parts are viable for widespread use in the aviation industry. Possible applications of this new technology include aircraft battle damage repair (ABDR), small batch manufacturing to fill supply gaps and replacement for obsolete parts. This paper aims to assess the effectiveness of ultrasonic inspection in detecting manufactured flaws in EBM-manufactured Ti-6Al-4V. Additively manufactured EBM products have a high surface roughness in “as-manufactured” condition which is an artifact of the manufacturing process. The surface roughness is known to affect the results of ultrasonic inspections. Experimental data from this research demonstrate the ability of ultrasonic inspections to identify imbedded flaws as small as 0.51 mm at frequencies of 2.25, 5 and 10 MHz through a machined surface. Detection of flaws in higher surface roughness samples was increased at a frequency of 10 MHz opposed to both lower frequencies tested. Design/methodology/approach The approach is to incorporate ultrasonic waves to identify flaws in an additive manufactured specimen Findings A wave frequency of 10 MHz gave good results in finding flaws even with surface roughness present. Originality/value To the best of the authors’ knowledge, this was the first attempt that was able to identify small flaws using ultrasonic sound waves in which surface roughness was present.

Study on Nano-Hydroxyapatite Assisted Preparing by Ionic Liquids

2014 ◽  
Vol 1015 ◽  
pp. 501-504 ◽  
Author(s):  
Yong Guang Bi ◽  
Xu Si Xu
Keyword(s):  
Grain Size ◽  
Ionic Liquids ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Large Scale ◽  
Preparation Method ◽  
Raw Material ◽  
Large Scale Preparation ◽  
Scale Preparation

Papers with Ca (NO3)2• 4H2O and (NH4)2HPO4as raw material, prepared by ionic liquids assisted nanoHAP, resulting hexagonal nanoHAP are crystal grain size are 10-20nm level, are smaller nanometer range ; specific surface area, the findings show that ionic liquids have the technology to promote the significance of the preparation method can provide a reference for large-scale preparation of biomedical nanomaterials.

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