Alkali resistance promotion of Ce-doped vanadium-titanic …

Abstract. The effect of K deactivation on V 2 O 5 /WO 3 -TiO 2 and Ce-doped V 2 O 5 /WO 3 -TiO 2 catalysts in the selective catalytic reduction (SCR) of NO x by NH 3 was studied. Ce-doped V 2 O 5 /WO 3 -TiO 2 showed significantly higher resistance to K deactivation than V 2 O 5 /WO 3 -TiO 2.

Tailored activity of Ce–Ni bimetallic modified V

Thus, the titanium species in the catalyst has a higher density of the electron cloud when nickel or cerium is introduced. ... NH3-SCR denitration catalyst performance over vanadium–titanium with the addition of Ce and Sb. Acta Sci. Circumstantiae, 31 (5) (2015), pp. 74-80. Google Scholar

Process Mineralogy of Vanadium Titanomagnetite Ore

After decades of development of the vanadium titanomagnetite (VTM) ore in the Panzhihua district changes have taken place to the ore characteristics. In addition, preliminary research carried out in this area mainly focused on the separation and extraction of iron resources and lacked a systematic research focus on the process mineralogy of ilmenite, resulting …

Separations | Free Full-Text | Process Mineralogy of …

Vanadium titanomagnetite (VTM) is a valuable multi-element symbiotic ore mainly composed of iron, vanadium, and titanium, as well as small amounts of …

The chemistry of titanium and vanadium. | Semantic Scholar

Vanadium States in Doped Bi12SiO20. P. Petkova P. Vasilev M. Mustafa I. Parushev. Materials Science, Chemistry. 2015. We have investigated the absorption of the V doped Bi 12 SiO 20 in the spectral region 1.45-2 eV (11 696 – 16 129 cm -1 ). The observed absorption bands are due to the V 2+, V 3+ and V 4+ ions in….

The effect of micro alloying elements (vanadium, titanium) …

Due to higher dissolving temperature of (vanadium, titanium)(carbon, nitrogen), the austenite grain of V−Ti−N steel keeps fine and increases slowly from 900 °C to 1250 °C. The difference of activation energy between V−N steel and V−Ti−N steel was supposed to come from the effect of different kinds of precipitates on the austenite ...

Titaniferous magnetites as a source of vanadium titanium …

Titaniferous magnetite hard rock deposits are common throughout the world. Previously they have been processed to recover vanadium using the standard salt roast process, however the economics based on vanadium alone can be marginal due to the high CAPEX and OPEX, making it vulnerable in a volatile vanadium market. New Zealand Steel and …

Metals | Free Full-Text | Vanadium–Titanium Magnetite …

This paper investigated a pellet ore production process in which vanadium was extracted from vanadium and titanium magnetite concentrates using sulfuric acid leaching. Calcium and magnesium were added to the iron ore concentrate during pellet production to produce calcium vanadate and magnesium vanadate after roasting. The …

Electron Configuration Chart of All Elements (Full Chart)

Electron configuration of Cerium (Ce) [Xe] 4f 1 5d 1 6s 2: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 5s 2 5p 6 4f 1 5d 1 6s 2: 2, 8, 18, 19, 9, 2: 59: Electron configuration of Praseodymium (Pr) [Xe] 4f 3 6s 2: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 5s 2 5p 6 4f 3 6s 2: 2, 8, 18, 21, 8, 2: 60: Electron configuration of Neodymium ...

Present Status and Development of Comprehensive Utilization of Vanadium

The main products of vanadium-titanium magnetite beneficiation are titanium iron concentrate (iron ore) containing about 50% of titanium in V-Ti magnetite, ilmenite concentrate containing about 50% of titanium, and cobalt sulfide concentrate [1,2,3,4].Titanium iron concentrate is mainly used for iron making through blast furnace …

Study of the structural, thermodynamic and cyclic effects of vanadium …

The substitution of the high-purity and expensive raw materials vanadium (V) and titanium (Ti) by their low-cost, low-purity alternatives ferrovanadium (FeV) and Ti sponge in Ti 0.98 Zr 0.02 V 0.43 Fe 0.09 Cr 0.05 Mn 1.5 was investigated and the microstructural, thermodynamic and cyclic properties were tested of these compounds. …

NH3-SCR denitration catalyst performance over …

The peaks located at 905.0 eV are arised from Ce 3+ 3d 3/2, and the peaks located at 884.4 eV are arised from Ce 3+ 3d 5/2, while the others can be assigned …

Mount Peake Vanadium-Iron-Titanium Project

Australian resource company TNG plans to start construction on the Mount Peake vanadium -iron-titanium project located in the Arunta province of Northern Territory, Australia, in 2017 . A prefeasibility study completed in July 2012 called for a 20-year mine life at an ore production rate of five million tonnes per annum (Mtpa).

Vanadium-titanium oxide catalyst, and preparation …

The invention relates to a vanadium-titanium oxide catalyst which can resist alkaline metal and alkaline earth metal poisoning. The catalyst is characterized in that the vanadium-titanium oxide catalyst is doped with an element Ce. The catalyst has fine resistance to alkaline metal poisoning, and above all, the doped cerium component has no influence …

NH3-SCR denitration catalyst performance over …

All vanadium–titanium based catalysts have good low temperature NH 3 -SCR activity with different Ce and Sb loadings. When the reaction temperature is at …

Titanium Vanadium Alloy | AMERICAN ELEMENTS

It is a hard, ductile transition metal that is primarily used as a steel additive and in alloys such as Titanium-6AL-4V, which is composed of titanium, aluminum, and vanadium and is the most common titanium alloy commercially produced. Vanadium is found in fossil fuel deposits and 65 different minerals. Vanadium is not found free in nature ...

Vanadium Titanium Magnetite Concentrate, Calcium …

The direct vanadium extraction method, in which vanadium is extracted from vanadium– titanium magnetite ore before ironmaking, has a high vanadium recovery rate [18,19]. The roasting process has a crucial effect on vanadium recovery [20,21]. When the roasting tem-perature is lower than 1200 C, increasing the temperature improves the vanadium ...

Present Status and Development of Comprehensive …

The main products of vanadium-titanium magnetite beneficiation are titanium iron concentrate (iron ore) containing about 50% of titanium in V-Ti magnetite, …

Characterization and Pre-Concentration of Low-Grade Vanadium-Titanium …

A large number of unexploited low-grade vanadium-titanium magnetite deposits have been found in the Chao-yang area of China in recent years. The reserves are estimated at more than 20 billion tons.

High-Efficiency Smelting Separation of Vanadium–Titanium …

South African vanadium–titanium magnetite is a complex mineral resource rich in iron, vanadium, titanium, and chromium [1,2,3].Its ore composition is composed of more than 20 elements [4,5,6].It is the most complex ore of its type in the world and contains more than 10 valuable elements, so it has a very important integrated utilization …

Optimized magnetic separation for efficient recovery of V …

They reported that a vanadium‑titanium magnetite concentrate containing 1.14% V 2 O 5, 22.22% TiO 2, 42.51% Fe, and a concentrate of ilmenite containing 16.05% TiO 2 and 20.77% Fe were obtained according to the different magnetic intensities in the range of 0.4–0.8 T. However, because there is no explanation for the vanadium …

Ce–Ti catalysts modified with copper and vanadium to …

In this work, V/Ce–Ti catalysts were modified with different kinds of transition metals (Cu, Fe, Co, Mn) by sol–gel and impregnation methods. The NH 3 oxidation performance of them was tested to select the most active catalyst in NH 3-selective catalytic oxidation (NH 3 –SCO). The effect of NO, SO 2 and H 2 O was also investigated. The …

High electrochromic performance of co-sputtered vanadium–titanium …

Semantic Scholar extracted view of "High electrochromic performance of co-sputtered vanadium–titanium oxide as a counter electrode" by J. Lim et al. Skip to search form Skip to main ... Structural characterization and electrochemical properties of cerium–vanadium (Ce–V) mixed oxide films synthesized by chemical route. I. Amaechi …

Low-Index Facet Polyhedron-Shaped Binary Cerium Titanium …

However, the low electrochemical activity of carbon-based electrodes toward a vanadium redox reaction limits the performance of redox flow batteries. In this study, polyhedral binary cerium titanium oxide (Ce 2/3 TiO 3, CTO) is synthesized using molten salt synthesis. CTO is fabricated by adjusting the temperature and composition.

NH3-SCR denitration catalyst performance over vanadium-titanium …

DOI: 10.1016/j.jes.2014.09.040 Corpus ID: 9178621; NH3-SCR denitration catalyst performance over vanadium-titanium with the addition of Ce and Sb. @article{Xu2015NH3SCRDC, title={NH3-SCR denitration catalyst performance over vanadium-titanium with the addition of Ce and Sb.}, author={Chi Xu and Jian Liu and …

Preparation and Coloration of Colored Ceramics Derived …

Besides, the Fe, Ti, and Mn elements in vanadium-titanium slags possess strong color rendering ability. In the present study, we explored the influence of Fe, Ti, and Mn in vanadium-titanium slags ...

Alkali resistance promotion of Ce-doped vanadium

Commonly, the operating temperature window of vanadium based catalysts for reducing NO x from stationary sources is between 300 and 400°C. To investigate the …