caa a22 4500 388021705 CHVBK 20180307124926.0 cr unu---uuuuu 161130e199807 xx s 000 0 eng 10.1557/JMR.1998.0278 doi S0884291400045143 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0278 Synthesis of a Mo/Nb mixed carbide [Elektronische Daten] Molybdenum and niobium carbides (β−Mo2C, NbC), as well as mixed carbides of molybdenum and niobium, were synthesized by the temperature-programmed carburization method (TPC) using a 20 vol% CH4/H2 gas mixture. The starting materials were MoO3, B-Nb2O5, and physical mixtures of B-Nb2O5/MoO3 with Nb/(Nb + Mo) atomic ratios varying from 0.2 to 0.8, respectively. Results from catalytic and temperatureprogrammed oxidation (TPO) measurements indicate that during the carburization of the Nb2O5/MoO3 physical mixture with Nby(Nb + Mo) = 0.8 there is, besides β−Mo2C and NbC formation, the appearance of a carbidic phase not detectable by x-ray diffraction (XRD). This phase appears to be highly active and selective for the dibenzothiophene hydrodesulfurization (HDS) reaction. Copyright © Materials Research Society 1998 Teixeira da Silva V. L. S. NUCAT/PEQ/COPPE/Universidade Federal do Rio de Janeiro, Caixa Postal 68502, Rio de Janeiro, RJ-21945-970, Brazil, and Environmental Catalysis and Materials Laboratory, Department of Chemical Engineering, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061 Schmal M. NUCAT/PEQ/COPPE/Universidade Federal do Rio de Janeiro, Caixa Postal 68502, Rio de Janeiro, RJ-21945-970, Brazil Schwartz V. Environmental Catalysis and Materials Laboratory, Department of Chemical Engineering, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061 Oyama S. T. Environmental Catalysis and Materials Laboratory, Department of Chemical Engineering, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061 Journal of Materials Research Cambridge University Press 13/7(1998-07), 1977-1988 0884-2914 13:7<1977 1998 13 JMR https://doi.org/10.1557/JMR.1998.0278 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0278 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Teixeira da Silva V. L. S. NUCAT/PEQ/COPPE/Universidade Federal do Rio de Janeiro, Caixa Postal 68502, Rio de Janeiro, RJ-21945-970, Brazil, and Environmental Catalysis and Materials Laboratory, Department of Chemical Engineering, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061 NATIONALLICENCE 700 1- Schmal M. NUCAT/PEQ/COPPE/Universidade Federal do Rio de Janeiro, Caixa Postal 68502, Rio de Janeiro, RJ-21945-970, Brazil NATIONALLICENCE 700 1- Schwartz V. Environmental Catalysis and Materials Laboratory, Department of Chemical Engineering, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061 NATIONALLICENCE 700 1- Oyama S. T. Environmental Catalysis and Materials Laboratory, Department of Chemical Engineering, Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/7(1998-07), 1977-1988 0884-2914 13:7<1977 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge