Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-3-8381-1182-7 |
Объём: | 164 страниц |
Масса: | 270 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 1 |
In the present work Pd- and Rh- integrated perovskites are developed and characterized regarding the state of Pd and catalytic activity by means of microstructural and spectroscopic methods (XRD, SEM, TEM, XPS, and -SCR-NOx). Pd in the La- based perovskite partially displays a reversible diffusion mechanism under redox atmospheres at 600° C. These effects produce a self-regenerative mechanism at relatively high temperatures. Catalytic testing under model gas mixtures of powders and coatings of these perovskites proves the potential of these materials for effective NOx-reduction under lean conditions. Hydrogen provides the best NO- reduction results among the employed reducing agents (i.e. H2, C3H6, and C8H18). The Pd-integrated Perovskites display peak NO-conversions of 72 % and N2-selectivities of 72 % in the presence of H2O- vapour and CO2 at temperatures below 300°C. For instance, Ba- and Ce- substituted perovskites are also active for NO-reduction up to 400°C.
Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.