Ternary-Phase NiMoWS2 Catalytic Material for Hydrodesulfurization

A number of investigators have examined moire patterns on precipitate particles in various age-hardening alloys. For example, Phillips has analyzed moire fringes at cobalt precipitates in copper and Von Heimendahl has reported on moire fringes in the system Al-Au. Recently, we have observed moire patterns on impurity precipitates in beryllium quenched in brine from 1000°C and aged at various temperatures in the range of 500-800°C. This heat treatment of beryllium rolled from vacuum cast ingots produces the precipitation of both an fee ternary phase, AlFeBe4, and an hcp binary phase, FeBe11. However, unlike a typical age-hardening alloy, the solute content of this material is low (less than 1000 ppm of Fe and 600 ppm of Al) and hence the total volume fraction of precipitates is small. Therefore there is some difficulty in distinguishing the precipitates and their orientation relationships with the beryllium matrix since the weak precipitate spots generally do not appear on the diffraction patterns.

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APPLICATION OF TITANIUM OXIDE COATINGS FOR NEUTRALIZATION OF HAZARDOUS CHEMICAL SUBSTANCES

Collection of scientific works of Odesa Military Academy ◽

10.37129/2313-7509.2019.12.2.131-136 ◽

2019 ◽

Vol 2 (12) ◽

pp. 131-136

Author(s):

О. Halak ◽

N. Poltorak ◽

О. Kravchuk ◽

V. Synko ◽

Y. Korol

Keyword(s):

Ultraviolet Rays ◽

Gaseous Emissions ◽

Oxide Coatings ◽

Mobile Objects ◽

Hazardous Chemical ◽

Catalytic Material ◽

Air Purifier ◽

Domestic Use ◽

Purification Methods ◽

Plasma Electrolytic

Contamination of hazardous chemicals is currently considered one of the major environmental problems. The methods of purification of gaseous emissions depending on the physicochemical properties of pollutants, in particular dangerous chemical, their aggregate state, concentration in the gas environment are studied in this article. The effect of aerosol content such as dust and soot is analyzed as well as the efficiency of purification methods at different temperature intervals, methods of purification of multicomponent mixtures. The comparative characteristics of thermochemical, reagent, sorption and catalytic methods are given and the prospects of their application in filtering systems of stationary and mobile objects are evaluated. It has been proved that almost any organic compounds can be oxidized (mineralized) on the TiO2surface. In practice, any photocatalytic air purifier includes a porous TiO2 deposited carrier, which is irradiated with ultraviolet rays and through which air is purged. Photocatalysis is suitable for domestic use as it can occur at room temperature. For example, a thermocatalytic method of destroying harmful substances requires preheating the air to a temperature above 200 ° C. Photocatalysis destroys substances that penetrate even through activated carbon filters. Features of formation of oxide coatings by plasma-electrolytic oxidation of titanium alloys are considered. It is proposed to refine the design of collective defense systems on armored vehicles and stationary facilities with additional installation in the filter-absorber of the grid with the deposited layer of catalytic material, which will neutralize various types of dangerous chemicals due to photocatalytic air purification.

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Synthesis of 3,4-Dihydropyrano[c]chromenes Using Carbon Microsphere Supported Copper Nanoparticles (Cu-NP/C) Prepared from Loaded Cation Exchange Resin as a Catalyst

Current Organic Synthesis ◽

10.2174/1570179415666181116104931 ◽

2019 ◽

Vol 16 (2) ◽

pp. 288-293

Author(s):

Yogesh W. More ◽

Sunil U. Tekale ◽

Nitishkumar S. Kaminwar ◽

László Kótai ◽

Tibor Pasinszki ◽

...

Keyword(s):

Raman Spectroscopy ◽

Cation Exchange ◽

Copper Nanoparticles ◽

Exchange Resin ◽

Cation Exchange Resin ◽

Environmentally Benign ◽

High Yield ◽

Carbon Microsphere ◽

Catalytic Material ◽

Operational Simplicity

Aim and Objective: The present study was performed with the aim to develop an efficient and environmentally benign protocol for the synthesis of biologically siginifcant 3, 4-dihydropyrano[c]chromenes using a new catalytic material. The protocol involves the use of a reusable, environment friendly materials and solvents with operational simplicity. Materials and Methods: Carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin were synthesized, characterized with well versed analytical techniques such as XRD, SEM and Raman spectroscopy and the synthesized material was used as a catalyst for the environmentally benign synthesis of 3,4-dihydropyrano[c]chromenes. Results: The formation of carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin was confirmed by XRD, SEM and Raman spectroscopy which was employed as a heterogeneous material for the synthesis of 3,4-dihydropyrano[c]chromenes. The products formed were characterized by the analysis of spectroscopic data - NMR, IR and mass. The safe catalytic system offers several advantages including operational simplicity, environmental friendliness, high yield, and reusability of catalyst and green chemical transformation. Conclusion: Herein we report an easy and efficient protocol for the one-pot synthesis of dihydropyrano[ c]chromenes using environmentally benign MCR approach in ethanol as the green solvent. The method developed herein constitutes a valuable addition to the existing methods for the synthesis of titled compounds.

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Using phase boundary mapping to resolve discrepancies in the Mg2Si–Mg2Sn miscibility gap

Journal of Materials Chemistry A ◽

10.1039/d1ta00115a ◽

2021 ◽

Author(s):

Rachel Orenstein ◽

James P. Male ◽

Michael Toriyama ◽

Shashwat Anand ◽

G. Jeffrey Snyder

Keyword(s):

Phase Diagram ◽

Phase Boundary ◽

Ternary Phase ◽

Ternary Phase Diagram ◽

Miscibility Gap ◽

Boundary Mapping

A new understanding of the MgSi–MgSn miscibility gap is reached through phase boundary mapping the Mg–Si–Sn ternary phase diagram.

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Simultaneous wastewater treatment and generation of blended fuel methane and hydrogen using Au-Pt/TiO2 photo-reforming catalytic material

Fuel ◽

10.1016/j.fuel.2020.120113 ◽

2021 ◽

Vol 291 ◽

pp. 120113

Author(s):

Girivyankatesh Hippargi ◽

Swapna Anjankar ◽

Reddithota J. Krupadam ◽

Sadhana S. Rayalu

Keyword(s):

Wastewater Treatment ◽

Catalytic Material ◽

Blended Fuel

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Combining CaO–SiO2–TiO2 and CaO–SiO2–Al2O3 ternary phase systems for design of bimetallic welds

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/0954405421995919 ◽

2021 ◽

Vol 235 (8) ◽

pp. 1271-1283

Author(s):

Deepak Bhandari ◽

Rahul Chhibber ◽

Lochan Sharma ◽

Navneet Arora ◽

Rajeev Mehta

Keyword(s):

Weld Metal ◽

Power Plants ◽

Ternary Phase ◽

Desirability Function ◽

Manganese Content ◽

Research Work ◽

Welding Process ◽

Delta Ferrite ◽

Electrode Coating ◽

Phase Systems

The bimetallic welds are frequently utilized for pipeline transport system of the nuclear power plants. The occurrences of welding defects generally depend on the filler electrode as well as the electrode coatings during shielded metal arc welding process. This study involves the design of austenitic stainless steel welding electrodes for SS304L–SA516 bimetallic welds. The objective of research work includes the novel design of Al2O3–TiO2–CaO–SiO2 coatings by combining two ternary phase systems using extreme vertices mixture design methodology to analyze the effect of key coating constituents on the weld metal chemistry and mechanical properties of the welds. The significant effect of electrode coating constituent CaO on weld metal manganese content is observed which further improves the toughness of bimetallic weld joints. Various regression models have been developed for the weld responses and multi objective optimisation approach using composite desirability function has been adopted for identifying the optimized set of electrode coating compositions. The role of delta ferrite content in promoting the favourable solidification mode has been studied through microstructural examination.

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Lattice evolution, ordering transformation and microwave dielectric properties of rock-salt Li3+xMg2–2xNb1-xTi2xO6 solid-solution system: A newly developed pseudo ternary phase diagram

Acta Materialia ◽

10.1016/j.actamat.2021.116636 ◽

2021 ◽

Vol 206 ◽

pp. 116636

Author(s):

Xing Zhang ◽

Zixuan Fang ◽

Hongyu Yang ◽

Peng Zhao ◽

Xiao Zhang ◽

...

Keyword(s):

Phase Diagram ◽

Solid Solution ◽

Dielectric Properties ◽

Ternary Phase ◽

Ternary Phase Diagram ◽

Microwave Dielectric Properties ◽

Solution System ◽

System A ◽

Microwave Dielectric ◽

Solid Solution System

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Calculation of phase diagrams and thermodynamic properties of 14 additive and reciprocal ternary systems containing Li2CO3, Na2CO3, K2CO3, Li2SO4, Na2SO4, K2SO4, LiOH, NaOH, and KOH

Canadian Journal of Chemistry ◽

10.1139/v84-078 ◽

1984 ◽

Vol 62 (3) ◽

pp. 457-474 ◽

Cited By ~ 19

Author(s):

A. D. Pelton ◽

C. W. Bale ◽

P. L. Lin

Keyword(s):

Phase Diagram ◽

Thermodynamic Properties ◽

Molten Salt ◽

Phase Diagrams ◽

Binary Systems ◽

Ternary Phase ◽

Ternary Phase Diagram ◽

Ternary Systems ◽

Maximum Error ◽

Critical Assessment

Phase diagrams and thermodynamic properties of five additive molten salt ternary systems and nine reciprocal molten salt ternary systems containing the ions Li+, Na+, [Formula: see text], OH− are calculated from the thermodynamic properties of their binary subsystems which were obtained previously by a critical assessment of the thermodynamic data and the phase diagrams in these binary systems. Thermodynamic properties of ternary liquid phases are estimated from the binary properties by means of the Conformal Ionic Solution Theory. The ternary phase diagrams are then calculated from these thermodynamic properties by means of computer programs designed for the purpose. It is found that a ternary phase diagram can generally be calculated in this way with a maximum error about twice that of the maximum error in the binary phase diagrams upon which the calculations are based. If, in addition, some reliable ternary phase diagram measurements are available, these can be used to obtain small ternary correction terms. In this way, ternary phase diagram measurements can be smoothed and the isotherms drawn in a thermodynamically correct way. The thermodynamic approach permits experimental data to be critically assessed in the light of thermodynamic principles and accepted solution models. A critical assessment of error limits on all the calculated ternary diagrams is made, and suggestions as to which composition regions merit further experimental study are given.

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Self-Cleaning Concrete for Landscaping Applications

MATEC Web of Conferences ◽

10.1051/matecconf/201928905004 ◽

2019 ◽

Vol 289 ◽

pp. 05004 ◽

Cited By ~ 1

Author(s):

Diana-Maria Mircea

Keyword(s):

Landscape Architecture ◽

Building Materials ◽

Organic Materials ◽

Construction Materials ◽

Significant Risk ◽

Natural Process ◽

Negative Effects ◽

Catalytic Material ◽

Self Cleaning ◽

Agriculture Water

Negative effects of environmental pollution pose a significant risk to agriculture, water resources and human health. This can however be reduced by selecting appropriate materials in construction and landscape architecture. It is well-known that strong sunlight or ultraviolet light decomposes many organic materials in a slow natural process. Photocatalytic substances accelerate this process and when used in concrete (which is one of the most widely used construction materials), permit the treatment of pollutants close to their source by applying a self-cleaning principle: decomposing organic materials, biological materials and pollutants into molecules like oxygen, water, carbon dioxide, nitrates, and sulphates. Catalytic material activation will start due to energy that is received from sunlight (it also can be activated using artificial lights), and self-cleaning begins when this material is activated. Beside other properties, this innovative self-cleaning concrete also keeps its colour for far longer than other traditional building materials, making it a desirable solution for landscaping applications.

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Part II. Model for the Protective Coating Formation During Hot Dip Galvanizing/ Część II. Model Formowania Powłoki Ochronnej Podczas Cynkowania Ogniowego

Archives of Metallurgy and Materials ◽

10.2478/amm-2014-0237 ◽

2014 ◽

Vol 59 (4) ◽

pp. 1393-1404 ◽

Cited By ~ 3

Author(s):

W. Wołczynski ◽

Z. Pogoda ◽

G. Garzeł ◽

B. Kucharska ◽

A. Sypien ◽

...

Keyword(s):

Phase Diagram ◽

Mass Balance ◽

Protective Coating ◽

Mathematical Description ◽

Ternary Phase ◽

Ternary Phase Diagram ◽

Solute Redistribution ◽

Zinc Bath ◽

Flux System ◽

Coating Formation

Abstract A mathematical description for the (Zn) - coating formation with the presence of flux in the zinc bath is presented. This description includes the progressive vanishing of the products of the flux disintegration. A function which expresses the flux vanishing is formulated. The solidification of some phase sub-layers in the (Zn) - coating is considered with the use of a hypothetical pseudo-ternary phase diagram Fe-Zn-flux. Some relationships are formulated to define the varying Zn - solute redistribution as observed across the sub-layers. The relationships are based on the mass balance analyzed for the coating / bath / flux system. An amount of the growing phase in a given sub-layers is also defined mathematically.

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