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| 1 | Solar chemical looping reforming of methane combined with isothermal H2O/CO2 splitting using ceria oxygen carrier for syngas production显示文摘The chemical looping reforming of methane through the nonstoichiometric ceria redox cycle(CeO2/CeO2-δ) has been experimentally investigated in a directly irradiated solar reactor to convert both solar energy and methane to syngas in the temperature range 900–1050 °C. Experiments were carried out with different ceria shapes via two-step redox cycling composed of endothermic partial reduction of ceria with methane and complete exothermic re-oxidation of reduced ceria with H2 O/CO2 at the same operating temperature, thereby demonstrating the capability to operate the cycle isothermally. A parametric study considering different ceria macrostructure variants(ceria packed powder, ceria packed powder mixed with inert Al2 O3 particles, and ceria reticulated porous foam) and operating parameters(methane flow-rate, reduction temperature, or sintering temperature) was conducted in order to unravel their impact on the bed-averaged oxygen non-stoichiometry(δ), syngas yield, methane conversion, and solar reactor performance. The ceria cycling stability was also experimentally investigated to demonstrate repeatable syngas production by alternating the flow between CH4 and H2 O(or CO2). A decrease in sintering temperature of the ceria foam was beneficial for increasing syngas selectivity, methane conversion,and reactor performance. Increasing both CH4 concentration and reduction temperature enhanced δ with the maximum value up to 0.41 but concomitantly favored CH4 cracking reaction. The ceria reticulated porous foam showed better performance in terms of effective heat transfer, due to volumetric absorption of concentrated solar radiation and uniform heating with lower solar power consumption, thereby promoting the solar-to-fuel energy conversion efficiency that reached up to 5.60%. The energy upgrade factor achieved during cycle was up to 1.19. Stable patterns in the δ and syngas yield for consecutive cycles with the ceria foam validated material performance stability. | Srirat Chuayboon Stéphane Abanades Sylvain Rodat | 2020 | Journal of Energy Chemistry2020，29，2： | 2 |
| 2 | Kinetic model- ling of methane decomposition in a tubular solar reac- tor显示文摘 | Rodat S Abanades S Couli6 J | 2009 | Chemical Engineering Journal2009，146，1： | 1 |
| 3 | Kineticmodeling of methane decomposition in a tubular solar reactor显示文摘 | Rodat S Abanades S Couli eJ | 2009 | Chemical Engineering Journal2009，146，1： | 1 |
| 4 | Hydrogen Pro- duction form solar thermal dissociation of natural gas:development of a 10 kW solar chemical reactor proto- type显示文摘 | Rodat S Abanades S Sans J L | 2009 | Solar Energy2009，83，9： | 1 |
| 5 | Kinetic modelling of methane decomposition in a tubular solar reactor显示文摘 | Rodat S Abanades S Coulie J | 2009 | Chemical Engineering Journal2009，146，1： | 1 |
| 6 | Kinetic modeling of methane decomposition in a tubular solar reactor显示文摘 | Rodat S Abanades S Coulie J | | 0，，01： | 1 |
| 7 | Effect of chronic hypoxia on voltageindependent calcium influx activated by 5-HT in rat intrapulmonary arteries显示文摘 | Rodat L Savineau J P | 2007 | P flugers Arch-Eur J Physiol2007，454，1： | 1 |
| 8 | Kinetic modeling of methane decomposition in a tubular solar reactor显示文摘 | Rodat S Abanades S CoulieJ | 2009 | Chemieal EngineeringJournal2009，146，1： | 1 |
| 9 | Kinetic modeling of methane decomposi- tion in a tubular solar reaetor显示文摘 | Rodat S | 2009 | Chemical Engineering Journal2009，146，1： | 1 |
| 10 | Kinetic modelling of methane decomposition in a tubular solar reactor显示文摘 | Rodat S Abanades S Coulie J | 2009 | Chemical Engineering Journal2009，146，1： | 1 |
| 11 | Recent advances in amino acid analysis by CE 显示文摘 | POINSOT V RODAT A COUDERC F | 2008 | Electrophoresis2008，29，： | 1 |
| 12 | Kinetic modeling of methane decomposition in a tubular solar reactor显示文摘 | Sylvain Rodat Stéphane Abanades Julien Coulié | | 0，，01： | 1 |
| 13 | Kinetic modelling of methane decomposition in a tubular solar reactor显示文摘 | Rodat S Abanades S Coulie J | 2009 | Chemical Engineering Journal2009，146，1： | 1 |
| 14 | DNA methylation of channel-related genes in cancers显示文摘 | Ouadidi A H Rodat D L Matifat F | 2015 | Biochim Biophys Acta2015，2736，15： | 1 |
| 15 | Natural gas pyrolysis in double-walled reactor tubes using thermal plasma or concentrated solar radiation as external heating source显示文摘The thermal pyrolysis of natural gas as a clean hydrogen production route is examined. The concept of a double-walled reactor tube is proposed and implemented. Preliminary experiments using an external plasma heating source are carried out to validate this concept. The results point out the efficient CH4 dissociation above 1850 K (CH4 conversion over 90%) and the key influence of the gas residence time. Simulations are performed to predict the conversion rate of CH4 at the reactor outlet, and are consistent with experimental tendencies. A solar reactor prototype featuring four independent double-walled tubes is then developed. The heat in high temperature process required for the endothermic reaction of natural gas pyrolysis is supplied by concentrated solar energy. The tubes are heated uniformly by radiation using the blackbody effect of a cavity-receiver absorbing the concentrated solar irradiation through a quartz window. The gas composition at the reactor outlet, the chemical conversion of CH4, and the yield to H2 are determined with respect to reaction temperature, inlet gas flow-rates, and feed gas composition. The longer the gas residence time, the higher the CH4 conversion and H2 yield, whereas the lower the amount of acetylene. A CH4 conversion of 99% and H2 yield of about 85% are measured at 1880 K with 30% CH4 in the feed gas (6 L/min injected and residence time of 18 ms). A temperature increase from 1870 K to 1970 K does not improve the H2 yield. | Stphane Abanades Stefania Tescari Sylvain Rodat Gilles Flamant | 2009 | Journal of Natural Gas Chemistry2009，18，1： | 1 |
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