000			01808nab a2200217 4500
005			20260520003109.0
008			260224s2015 xxu ing
041			_aInglés
245	0	0	_aComparative TPR and TPD Studies of Cu and Ca Promotion on Fe-Zn- and Fe-Zn-Zr-Based Fischer-Tropsch Catalysts
260			_a _b _cmayo/jun. 2015
270			_a15/09/2015 ; 15/09/2015
300			_a8 p. ; 511-519
520			_aTranscripción del resumen del autor: The present study demonstrates the effect of zirconium promotion on Fe-Zn-based catalysts to boost the active sites of Fischer-Tropsch (FT) catalysts. The catalysts are also promoted by Cu and Ca and the active sites are examined using Temperature-Programmed Reduction (TPR) with H2 and CO and Temperature-Programmed Desorption (TPD) with NH3 and CO2. The results are presented as a comparative study between Fe-Zn- and Fe-Zn-Zr-based catalysts. The results show that addition of Zr to Fe-Zn catalysts increases the availability and dispersion of the precursor to the active sites and promotion with Cu and Ca independently and synergistically enhances reduction of Fe-Zn-Zr-based catalysts. The presence of Ca promotes carburisation, while Cu inhibits carburisation. The impact of the Ca and Cu on the surface acidity/basicity is governed by the nature of the interaction between the phases in the catalysts. The extent of reduction reflects the availability and dispersion of the precursor to the active phase, while the extent of carburisation will impact on the selectivity of the catalysts.
581			_a3
773	0		_tOil and Gas Science and Technology _g70
942			_cARTICULO
100	1		_aJames, Olusola O. _954926
100	1		_aChowdhury, Biswajit _954927
100	1		_aMaity, Sudip _954928
999			_c189216 _d189216