Characterization by Tga and Uv-visible of new pigment materials containing mica, P4VP and D&C red 6 dye

DOI: 10.3303/CET1332356International audienceThe pigments and dyes industry must constantly develop new products with more innovative visual effects. Various industrial sectors such as cosmetics, textile fibers, painted paper and ceramics...etc, need new optical effects for their commercial products. The field of study of these pigments is vast and the market is in full expansion. Among the desired optical effects, manufacturers try to imitate nature by creating the appearance of increasingly sophisticated products: for example interferential compounds changing color and aspect under the effect of the light and according to angle. These effects can be achieved through the existence of highly ordered structures defined and organized within compounds to be developed. In our work, we succeeded in formulating new pigmentary materials by adsorption of polymer on mica particles and fixation of D&C Red 6 dyes on polymer. These new pigmentary materials can either differ by their colors, or to present interferential effects. Copyright © 2013, AIDIC Servizi S.r.l

Catalytic partial oxidation of methane over nanosized Rh supported on Fecralloy foams

Structured catalysts for the partial oxidation of methane were prepared by supporting Rh nanoparticles onto Fecralloy foams at relatively low precious metal loadings. The investigation was focused mainly on an innovative and straightforward preparation procedure consisting in the direct cathodic electrodeposition of Rh onto foam samples. For the sake of comparison, other Rh-based catalysts were prepared with a more traditional approach, by using the same foams and an AlPO4washcoat layer. The catalysts were characterized by SEM-EDS, XRD and cyclic voltammetry, to assess the Rh surface area, and tested in the CPO of methane to syngas under self-sustained high temperature conditions at short-contact-time. During prolonged CPO tests the performance of electrochemically prepared catalysts underwent a progressive decline, as compared to stable operation of AlPO4washcoated catalysts, which was mainly ascribed to sintering of Rh nanoparticles, negatively affecting the activity for methane steam reforming. Copyright © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved