New Catalyst for Removal of N2O from Nitric Acid Plant Tail Gases

0428862 - ÚCHP 2015 SK eng C - Conference Paper (international conference)
Obalová, L. - Kovanda, F. - Jirátová, Květa
New Catalyst for Removal of N2O from Nitric Acid Plant Tail Gases.
Proceedings. Bratislava: AXIMA Graphics Design & Printing Services, 2014 - (Markoš, J.), s. 3. ISBN 978-80-89475-13-1.
[International Conference of Slovak Society of Chemical Engineering /41./. Tatranské Matliare (SK), 26.05.2014-30.05.2014]
R&D Projects: GA TA ČR TA01020336
Grant - others:GA MŠk(CZ) LO1208
Institutional support: RVO:67985858
Keywords : nitrous oxide * catalytic decomposion * mixed oxide catalyst
Subject RIV: CI - Industrial Chemistry, Chemical Engineering

The catalytic decomposition of N2O as a method for abatement of N2O emissions in waste gases attracts increasing attention due to the inclusion of N2O in the greenhouse gas trade. Many research groups are focused on the development of suitable catalysts for this reaction because it is still a problem to find the catalyst with sufficient activity and stability in real off-gas conditions due to water, oxygen and NOx inhibition effects. Multicomponent mixed oxides prepared by thermal treatment of layered double hydroxide (LDH) precursors seem to be promising catalysts for this reaction. Layered double hydroxides with general chemical composition of [MII1-xMIIIx(OH)2]x+[An-x/n.yH2O]x- where MII and MIII are divalent and trivalent metal cations and An- is an n-valent anion (often carbonate) consist of positively charged hydroxide layers separated by interlayers containing anions and water molecules. Thermal treatment of LDH precursors gives finely dispersed mixed oxides of MII and MIII with large surface area and good thermal stability. Presented contribution will present intrinsic kinetic data obtained in laboratory experiments of N2O decomposition over grained LDH-related mixed oxides as well as results of pilot plant experiments in real off gas from nitric acid production.
Permanent Link: http://hdl.handle.net/11104/0234098