Kinetics of mixed copper iron based oxygen carriers for hydrogen production by chemical looping water splitting

被引:46
作者
Chiron, Francois-Xavier [1 ]
Patience, Gregory S. [1 ]
机构
[1] Ecole Polytech Montreal, Dept Chem Engn, Montreal, PQ H3C 3A7, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Hydrogen; Water splitting; Oxygen carrier; Kinetics; OXIDE; REDUCTION; DECOMPOSITION; GENERATION; COMBUSTION; OXIDATION; NICKEL;
D O I
10.1016/j.ijhydene.2012.04.052
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Water splitting for hydrogen production through chemical looping was investigated in a micro fluidized bed reactor. Iron, copper and mixed iron copper based oxygen carriers were prepared by coprecipitation and incipient wetness impregnation and compared in terms of H-2 production via decomposition of water. The powders were completely reduced in hydrogen (10%), and exposed to steam at temperature ranging from 500 to 800 degrees C producing about 0.2 mmol of H-2 per gram of metal oxide in the case of a mixed Cu-Fe powder. Powders prepared by coprecipitation showed poor fluidization properties as well as poor reactivity compared to those synthesized through impregnation. Temperature Programmed Reductions (TPR) experiments carried out on a TGA showed that particles have different oxygen carrying capacities, ranging from 16% in the case of a copper oxide prepared by coprecipitation, to around 1% for other particles prepared impregnation. Kinetics were evaluated following gas solid mechanisms for two mixed Fe-Cu carriers. Oxidation of the mixed Fe-Cu carrier prepared by impregnation is well represented by a shrinking core model (phase-boundary-controlled). The activation energy for oxidation of this carrier was 46 kJ/mol. Oxidation of the mixed Fe-Cu carrier prepared by coprecipitation is well represented by a nuclei growth model (Avrami) with random nucleation and an activation energy of 51 kJ/mol. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:10526 / 10538
页数:13
相关论文
共 37 条
[1]   Kinetics of redox reactions of ilmenite for chemical-looping combustion [J].
Abad, Alberto ;
Adanez, Juan ;
Cuadrat, Ana ;
Garcia-Labiano, Francisco ;
Gayan, Pilar ;
de Diego, Luis F. .
CHEMICAL ENGINEERING SCIENCE, 2011, 66 (04) :689-702
[2]   Deactivation of iron oxide used in the steam-iron process to produce hydrogen [J].
Bleeker, M. F. ;
Veringa, H. J. ;
Kersten, S. R. A. .
APPLIED CATALYSIS A-GENERAL, 2009, 357 (01) :5-17
[3]  
Capros P, 2009, EUROPEAN ENERGY TRAN
[4]   Two-step water splitting thermochemical cycle based on iron oxide redox pair for solar hydrogen production [J].
Charvin, Patrice ;
Abanades, Stephane ;
Flamant, Gilles ;
Lemort, Florent .
ENERGY, 2007, 32 (07) :1124-1133
[5]   Three-reactors chemical looping process for hydrogen production [J].
Chiesa, Paolo ;
Lozza, Giovanni ;
Malandrino, Alberto ;
Romano, Matteo ;
Piccolo, Vincenzo .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2008, 33 (09) :2233-2245
[6]   Hydrogen production through chemical looping using NiO/NiAl2O4 as oxygen carrier [J].
Chiron, Francois-Xavier ;
Patience, Gregory S. ;
Rifflart, Sebastien .
CHEMICAL ENGINEERING SCIENCE, 2011, 66 (24) :6324-6330
[7]   Steam carbon gasification of a nickel based oxygen carrier [J].
Chiron, Francois-Xavier ;
Patience, Gregory S. .
FUEL, 2011, 90 (07) :2461-2466
[8]   COMPARATIVE EXPERIMENTAL INVESTIGATIONS OF THE WATER-SPLITTING REACTION WITH IRON-OXIDE FE1-YO AND IRON-MANGANESE OXIDES (FE1-XMNX)(1-Y)O [J].
EHRENSBERGER, K ;
FREI, A ;
KUHN, P ;
OSWALD, HR ;
HUG, P .
SOLID STATE IONICS, 1995, 78 (1-2) :151-160
[9]  
Fogler, 2008, ELEMENTS CHEM REACTI
[10]   Effect of gas composition in Chemical-Looping Combustion with copper-based oxygen carriers: Fate of sulphur [J].
Forero, C. R. ;
Gayan, P. ;
Garcia-Labiano, F. ;
de Diego, L. F. ;
Abad, A. ;
Adanez, J. .
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, 2010, 4 (05) :762-770