12653-71-3Relevant academic research and scientific papers
The adsorption and catalytic oxidation of the element mercury over cobalt modified Ce-ZrO2 catalyst
Zhang,Cui,Tan,Wang,Li,He
, p. 88332 - 88339 (2016)
Co was used as a modifier for Ce-ZrO2 to improve the surface physicochemical properties of the catalysts. The obtained catalysts Cox-Ce-ZrO2 were investigated for Hg0 adsorption and oxidation in the temperature range of 100-350 °C. The results showed that Co modified catalysts had an excellent Hg0 removal efficiency. For Co0.3-Ce-ZrO2, the Hg0 adsorption efficiency was above 81.5% even after a 164.5 h adsorption test and the Hg0 oxidation efficiency reached 100% in the temperature range of 100-250 °C. XRD, BET and XPS results suggested that the Co modified catalysts had larger surface areas and more oxygen vacancies. H2-TPR results showed that Co addition improved the redox performance of the catalyst. These results led to a better Hg0 removal efficiency by the Co modified catalysts. Furthermore, XPS results of Co0.3-Ce-ZrO2 before and after reaction showed that, during the Hg0 oxidation process, surface chemisorbed oxygen was dramatically consumed while some Co3+ and Ce4+ changed to Co2+ and Ce3+. This suggested that chemisorbed oxygen participated in the Hg0 oxidation process. A probable pathway of Hg0 oxidation was deduced based on these results. The effects of individual flue gas components (O2, NO, H2O, SO2) on Hg0 oxidation efficiency were investigated and the results showed that O2 and NO improved the Hg0 oxidation efficiency whereas H2O and SO2 inhibited it.
Pulsed corona discharge for oxidation of gaseous elemental mercury
Ko, Kyung Bo,Byun, Youngchul,Cho, Moohyun,Namkung, Won,Hamilton, Ian P.,Shin, Dong Nam,Koh, Dong Jun,Kim, Kyoung Tae
, (2008)
Positive pulsed corona discharge has been applied for the oxidation of gaseous elemental mercury (Hg0) from a simulated flue gas. The oxidation of Hg0 to HgO and Hg Cl2 can significantly enhance the mercury removal from flue gas. At a gas condition ofO2 (10%), H2O (3%), and N2 (balance), Hg0 oxidation efficiency of 84% was achieved at an input energy density of 45 Jl. The presence of NO, however, hinders Hg0 oxidation due to the preferential reaction of NO with O and O3. On the contrary, SO2 shows little effect on Hg0 oxidation due to its preferential reaction with OH. It has been also observed that the HCl in gas stream can be dissociated to Cl and Cl2 and can induce additional Hg0 oxidation to HgCl2-.
Photo-catalytic oxidation reaction of gaseous mercury over titanium dioxide nanoparticle surfaces
Snider, Graydon,Ariya, Parisa
, p. 23 - 28 (2010)
Hg0(g) is known to undergo photo-catalytic oxidation by UVA-irradiated TiO2 surfaces. One micrometre layers of TiO2 on quartz glass were irradiated within the 240-800 nm range. Gaseous mercury was measured by mass spectrom
COMPLEX DEVICE MEASURING FLOW RATE, DENSITY AND VISCOSITY OF PETROLEUM PRODUCTS
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, (2008/10/08)
-Ultrasonic measurement technology and may be used for operational determining flow rate, density and viscosity of petroleum products. Device contains generator, output of which is connected to input frequency divider, one output of which is connected to input of former of probing pulses output of which is connected to input controlled computing device commutator, connected to which are two piezoelectric converter, output of commutator is connected to input of amplifier, output of which is connected to input of phase detector, to the second input of which is connected so same output of frequency divider, the output of the phase detector is connected to input of computing device, output of which is connected to input indicator device, device for measuring coefficient of absorption of sound, input of which is connected to output of phase detector, and output is connected to input of computing device, temperature sensor, output of which is connected to input normalizing amplifier, output of which is connected to input computing device, two piezoelectric transducer, arranged along periphery of pipeline on diametrically opposite sides of so, that the line, connecting centers of the two sensors, is perpendicular to the main flow axis, input of the first of them is connected to output of master oscillator, and the output of the second is connected to input of detector output of which is connected to input normalizing amplifier, output of which is connected to input computing device. Invention provides diffusion lu accuracy device due to input in computer device information about acoustic resistance liquid sti. 1 ill.
Separation of mercury isotopes by the photochemical method
Vyazovetskii
, p. 1182 - 1186 (2007/10/03)
The separation of mercury (Hg) isotopes using a photochemical reaction was discussed. The oxidation of selectively excited mercury atoms in the presence of 1,3-butadiene was used to isolate the 196Hg, 198Hg, 199Hg, 200Hg, 202Hg isotopes in various concentrations. The process was characterized by a significant dergree of enrichment due to the use of low pressue lamps filled with mercury vapor enriched in the target isotope. The product of this photochemical reaction was solid HgO, which can be readily separated from mercury vapor.
Coupling of 2,7-Dihydroxynaphthalene by Mercuric Oxide
Pal, Anjali,Pal, Tarasankar
, p. 552 - 553 (2007/10/03)
Oxidative phenol coupling on 2,7-dihydroxynaphthalene by HgO leads to 1,6,7,12-perylenetetrol in 60% yield.
METALLOMETHANE. VII. 199Hg-NMR-STUDIEN AN MERCURIMETHANEN CH4-n(HgX)n (X = Cl, Br, I UND CN)
Breitinger, Dietrich K.,Kress, Wolfram,Sendelbeck, Raymond,Ishiwada, Kenzoe
, p. 245 - 252 (2007/10/02)
199Hg NMR spectra of the partly newly prepared mercurimethanes CH4-n(HgX)n (1n4; X=Cl, Br, I and CN) have been measured.The chemical shifts δ(199Hg) indicate increasing deshielding of the mercury nuclei with increasing n and in the series I a fixed n are explained by changes in population and extension of the 6p orbitals of mercury.The variations of δ(199Hg) with n correlate with the course of excitation energies ΔE.The coupling constants 2J(199Hg-1H) decrease with growing trans influence of the ligands X.
