Advances in New and Renewable Energy >
Thermodynamic Analysis of Biomass Char Chemical Looping Combustion with NiFe2O4 as Oxygen Carrier
Received date: 2016-02-24
Revised date: 2016-05-06
Online published: 2016-06-27
A model of biomass char chemical looping combustion was built using NiFe2O4 as oxygen carrier. Thermodynamic analysis and process simulation of the combustion were performed with software of HSC Chemistry 5.0 based on Gibbs free energy minimization principle. The simulation result for the reduction stage showed that the system performed best with the molar ratio of oxygen carrier to biomass char (O/BC) being 1.5 at the reactor temperature of 800°C. The thermodynamic analysis showed that the oxygen carrier was gradually reduced as a sequence of NiFe2O4→Ni-Fe2O3→ Ni-Fe3O4→Ni-FeO→Ni-Fe. The simulation result for the oxidation stage demonstrated that the lattice oxygen could recover to the original degree thermodynamically, while the XRD pattern of the oxidized NiFe2O4 particles confirmed that the reduced oxygen carrier could be re-oxidized to form NiFe2O4 spinel under the atmosphere of air from an experimental point of view.
LIU Shuai , HUANG Zhen , HE Fang , ZHENG An-qing , SHEN Yang , LI Hai-bin . Thermodynamic Analysis of Biomass Char Chemical Looping Combustion with NiFe2O4 as Oxygen Carrier[J]. Advances in New and Renewable Energy, 2016 , 4(3) : 172 -178 . DOI: 10.3969/j.issn.2095-560X.2016.03.002
[1] ADANEZ J, ABAD A, GARCIA-LABIANO F, et al. Progress in chemical-looping combustion and reforming technologies[J]. Progress in energy and combustion science, 2012, 38(2): 215-282. DOI: 10.1016/j.pecs. 2011.09.001.
[2] GUPTA P, VELAZQUEZ-VARGAS L G, FAN L S. Syngas redox (SGR) process to produce hydrogen from coal derived syngas[J]. Energy & fuels, 2007, 21(5): 2900-2908. DOI: 10.1021/ ef060512k.
[3] PUIG-ARNAVAT M, BRUNO J C, CORONAS A. Review and analysis of biomass gasification models[J]. Renewable and sustainable energy reviews, 2010, 14(9): 2841-2851. DOI: 10.1016/ j.rser.2010.07.030.
[4] KUO Y L, HSU W M, CHIU P C, et al. Assessment of redox behavior of nickel ferrite as oxygen carriers for chemical looping process[J]. Ceramics international, 2013, 39(5): 5459-5465. DOI: 10.1016/j.ceramint. 2012.12.055.
[5] HUANG Z, HE F, FENG Y P, et al. Characteristics of biomass gasification using chemical looping with iron ore as an oxygen carrier[J]. International journal of hydrogen energy, 2013, 38(34): 14568-14575. DOI: 10.1016/j.ijhydene.2013.09.022.
[6] FAN L S, ZENG L, LUO S W. Chemical-looping technology platform[J]. AIChE journal, 2015, 61(1): 2-22. DOI: 10.1002/aic.14695.
[7] LI F X, KIM H R, SRIDHAR D, et al. Syngas chemical looping gasification process: oxygen carrier particle selection and performance[J]. Energy & fuels, 2009, 23(8): 4182-4189. DOI: 10.1021/ef900236x.
[8] HUANG Z, HE F, FENG Y P, et al. Biomass char direct chemical looping gasification using nio-modified iron ore as an oxygen carrier[J]. Energy & fuels, 2014, 28(1): 183-191. DOI: 10.1021/ef401528k.
[9] PEÑA J A, LORENTE E, ROMERO E, et al. Kinetic study of the redox process for storing hydrogen: reduction stage[J]. Catalysis today, 2006, 116(3): 439-444. DOI: 10.1016/j.cattod. 2006.05.068.
[10] YANG S, KIM K, BAEK J I, et al. Spinel Ni(Al, Fe)2O4 solid solution as an oxygen carrier for chemical looping combustion[J]. Energy & fuels, 2012, 26(7): 4617-4622. DOI: 10.1021/ef300712u.
[11] BALAT M, BALAT M, KIRTAY E, et al. Main routes for the thermo-conversion of biomass into fuels and chemicals. Part 2: gasification systems[J]. Energy conversion and management, 2009, 50(12): 3158-3168. DOI: 10.1016/ j.enconman.2009.08.013.
[12] CARRERO-MANTILLA J, LLANO-RESTREPO M. Chemical equilibria of multiple-reaction systems from reaction ensemble Monte Carlo simulation and a predictive equation of state: combined hydrogenation of ethylene and propylene[J]. Fluid phase equilibria, 2006, 242(2): 189-203. DOI: 10.1016/j.fluid. 2006.02.007.
[13] MITTAL V K, BERA S, NITHYA R, et al. Solid state synthesis of Mg–Ni ferrite and characterization by XRD and XPS[J]. Journal of nuclear materials, 2004, 335(3): 302-310. DOI: 10.1016/j.jnucmat.2004.05.010.
[14] MITTAL V K, CHANDRAMOHAN P, BERA S, et al. Cation distribution in NixMg1−xFe2O4 studied by XPS and Mössbauer spectroscopy[J]. Solid state communications, 2006, 137(1/2): 6-10. DOI: 10.1016/j.ssc.2005.10.019.
/
〈 |
|
〉 |