12653-71-3Relevant articles and documents
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.
Bernstein, R. B.,Pars, H. G.,Blumenthal, D. C.
, p. 1579 - 1584 (1957)
Goodrich, J. C.,Goyan, F. M.,Morse, E. E.,Preston, R. G.,Young, M. B.
, p. 4411 - 4418 (1950)
Samuelson, G. J.,Brown, D. J.
, p. 2711 - 2714 (1935)
Henne, A. L.,Midgley, T.
, p. 884 - 887 (1936)
Weber, R.
, p. 161 - 162 (1958)
Smith, G. Mc P.
, p. 540 - 551 (1905)
Pierce, W. C.,Noyes, W. A.
, p. 2179 - 2187 (1928)
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-.
Bernstein, R. B.,Pars, H. G.
, p. 4433 - 4434 (1955)
Abblebey, M. P.,Reid, R. D.
, p. 2129 - 2136 (1922)
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.
