scholarly journals Reduction and oxidation kinetics of NiWO4 as an oxygen carrier for hydrogen storage by a chemical looping process

RSC Advances ◽  
2021 ◽  
Vol 11 (47) ◽  
pp. 29453-29465
P. E. González-Vargas ◽  
J. M. Salinas-Gutiérrez ◽  
M. J. Meléndez-Zaragoza ◽  
J. C. Pantoja-Espinoza ◽  
A. López-Ortiz ◽  

H2 storage of NiWO4 with a volumetric storage density of 496 g L−1 was studied and evaluated under a chemical looping reaction scheme by TGA. Results confirms the high potential of NiWO4 to current oxygen carriers reported in the literature.

2012 ◽  
Vol 188 ◽  
pp. 142-154 ◽  
Cristina Dueso ◽  
María Ortiz ◽  
Alberto Abad ◽  
Francisco García-Labiano ◽  
Luis F. de Diego ◽  

2013 ◽  
Vol 53 (1) ◽  
pp. 87-103 ◽  
Luis F. de Diego ◽  
Alberto Abad ◽  
Arturo Cabello ◽  
Pilar Gayán ◽  
Francisco García-Labiano ◽  

2007 ◽  
Vol 62 (23) ◽  
pp. 6556-6567 ◽  
Qamar Zafar ◽  
Alberto Abad ◽  
Tobias Mattisson ◽  
Börje Gevert ◽  
Michael Strand

2018 ◽  
Vol 32 (2) ◽  
pp. 1923-1933 ◽  
Francisco J. Velasco-Sarria ◽  
Carmen R. Forero ◽  
Eduardo Arango ◽  
Juan Adánez

2010 ◽  
Vol 146-147 ◽  
pp. 1398-1401
Lei Chen ◽  
Jing Jin ◽  
Hui Wei Duan

Chemical-looping combustion (CLC) is a new kind of efficient method to separate CO2. At present, most of CLC research focuses on the development of oxygen carriers. The sustainable capability is the one of important standards to evaluate performance of oxygen carrier. The iron- based and copper- based oxygen carrier were chosen in this paper. The comparative study between the analytically pure oxygen carriers and the prepared oxygen carriers with Al2O3 were made according to the reactivity of reduction and oxidation. The data was obtained by the TGA, SEM and XRD. The results show that the prepared carriers with Al2O3 are greatly improved both in reaction ratio and sustainable capability, and Fe- based oxygen carrier is better than the Cu- based oxygen carrier in the sustainable capability.

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2156
Young Ku ◽  
Chia-Wei Chang ◽  
Shr-Han Shiu ◽  
Hsuan-Chih Wu ◽  
Niels Michiel Moed

Chemical looping with oxygen uncoupling (CLOU) is an innovative alternative to conventional combustion. CuO/ZrO2 oxygen carriers were tested in this system for their effectiveness and resilience. Cupric oxide (CuO) was demonstrated to be a reliable oxygen carrier for oxygen-uncoupling with consistent recyclability even after 50 redox cycles in a thermogravimetric analyzer (TGA). The reduction of CuO to generate Cu2O and oxygen was observed to be improved markedly for experiments operated at higher temperatures; however, the oxidation of Cu2O by air to generate CuO was hindered for experiments carried out at elevated temperatures. The reduction rate of fabricated CuO/ZrO2 particles containing 40% CuO was enhanced with increasing temperature and decreased with increasing particle size for experiments operated in a fixed bed reactor. The geometrical contraction and Avrami-Erofe’ev models were demonstrated to be appropriate for describing the reduction and oxidation of CuO/ZrO2, respectively. The activation energies for the reduction and oxidation were determined to be 250.6 kJ/mol and 57.6 kJ/mol, respectively, based on experimental results in the temperature range between 850 and 1000 °C.

Atal B. Harichandan ◽  
Tariq Shamim

The hydrodynamics of fuel reactor in a chemical looping combustion (CLC) system has been analyzed by using a multiphase CFD-based model with solid-gas interactions and chemical reactions. In this paper, the fuel reactors of two CLC systems are numerically simulated independently by using hydrogen with calcium sulfide as oxygen carrier, and methane with nickel as oxygen carrier in similar conditions. Kinetic theory of granular flow has been adopted. Conservation of mass, momentum and species equations, and reaction kinetics of oxygen carriers are used for the numerical calculation. The present results obtained are in good agreement with the experimental and numerical results available in open literature. The bubble hydrodynamics in both the fuel reactors are analyzed. The salient features of bubble formation, rise and burst are prominent in hydrogen-fueled reactor as compared to methane-fueled reactor. The fuel conversion rate is found to be larger in the case of hydrogen-fueled reactor.

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