caa a22 4500 463252268 CHVBK 20180405153343.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s10562-007-9218-2 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9218-2 Synthesis of Pd-alumina and Pd-lanthana Suspension for Catalytic Applications by One-step Liquid Flame Spray [Elektronische Daten] [Helmi Keskinen, Jyrki Mäkelä, Ritva Heikkinen, Aslak Suopanki, Jorma Keskinen] Catalytic materials of alumina and lanthana supported nanosized palladium particles (7wt%) in a water suspension were prepared by Liquid Flame Spray (LFS) method. The particle production rate was 90g/h, using liquid precursors containing Al(NO3)3·9H2O, La(NO3)3·6H2O and Pd(NH3)4NO3 in water solution. In the LFS method, a turbulent, high-temperature (Tmax∼2,700°C) H2-O2 flame is used. The liquid precursor is atomized into micron sized droplets by high velocity H2 flow and introduced into the flame where the droplets will evaporate. The evaporated compounds decompose and the reaction product re-condenses into particulate material. Here, the nanosized particles are formed by gas-to-particle conversion and the micron sized particles via liquid-to-solid route. In this study, the produced particulate material was collected by thermophoresis along with condensing water into a suspension (nanoparticles in water) in a one-step process. Thus, the whole suspension was produced from the end products of the flame. According to TEM-EDS analysis, the particulate material contained micron sized porous aluminum oxide or lanthanum oxide carrier particles, coated by nanosized palladium particles (∼2-10nm). The surfactant (Rhodasurf-La 42) was injected into the suspension just after collection to reduce agglomeration. Catalytic performance of the produced Pd-lanthana containing suspension was tested in laboratory with synthetic gases, in order to use it as a possible raw material for three-way catalyst (TWC). The suspension was used as Pd raw material in TWC washcoat and dispersed onto a metallic honeycomb. Springer Science+Business Media, LLC, 2007 Nanoparticles nationallicence Suspension nationallicence Lanthana nationallicence Alumina nationallicence Palladium nationallicence TWC catalyst nationallicence Keskinen Helmi Institute of Physics, Tampere University of Technology, Korkeakoulunkatu 3, 33101, Tampere, Finland aut Mäkelä Jyrki Institute of Physics, Tampere University of Technology, Korkeakoulunkatu 3, 33101, Tampere, Finland aut Heikkinen Ritva Tekes, PL 86, 90101, Oulu, Finland aut Suopanki Aslak Ecocat Oy, Typpitie 1, 90650, Oulu, Finland aut Keskinen Jorma Institute of Physics, Tampere University of Technology, Korkeakoulunkatu 3, 33101, Tampere, Finland aut Catalysis Letters Springer US; http://www.springer-ny.com 119/1-2(2007-11-01), 172-178 1011-372X 119:1-2<172 2007 119 10562 https://doi.org/10.1007/s10562-007-9218-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9218-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Keskinen Helmi Institute of Physics, Tampere University of Technology, Korkeakoulunkatu 3, 33101, Tampere, Finland aut NATIONALLICENCE 700 1- Mäkelä Jyrki Institute of Physics, Tampere University of Technology, Korkeakoulunkatu 3, 33101, Tampere, Finland aut NATIONALLICENCE 700 1- Heikkinen Ritva Tekes, PL 86, 90101, Oulu, Finland aut NATIONALLICENCE 700 1- Suopanki Aslak Ecocat Oy, Typpitie 1, 90650, Oulu, Finland aut NATIONALLICENCE 700 1- Keskinen Jorma Institute of Physics, Tampere University of Technology, Korkeakoulunkatu 3, 33101, Tampere, Finland aut NATIONALLICENCE 773 0- Catalysis Letters Springer US; http://www.springer-ny.com 119/1-2(2007-11-01), 172-178 1011-372X 119:1-2<172 2007 119 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer