Oxygen mobility and its relationship with the oxidative steam reforming of ethanol (OSRE)

Operando DRIFT-MS for studying the oxidative steam reforming of ethanol (OSRE) reaction

“…The DRIFT configuration is the one most widely used in heterogeneous catalysis [3 , 4 , [7] , [8] , [9] , [10] , [11] , [12] since opaque solids are usually studied, mainly oxides, which present low absorption coefficients of infrared radiation that could not be easily used in the transmittance mode, therefore, their high refractive index is used to obtain information on the solid. Additionally, powdered materials can be studied (in their original state without modifying the properties of the solid [13] ) since they do not need to be compressed to form a tablet and the packing or accommodation in the measurement accessories simulates a catalytic bed quite well [14 , 15] .…”

“…With this incentive, the experimental set-up was designed to carry out the operando measurements, using infrared spectroscopy with Fourier transform in diffuse reflectance mode (DRIFT) in order to observe the surface changes of the organic species coupled to mass spectrometry (MS) equipment to monitor the oxidative steam reforming of ethanol (OSRE) process [11 , [19] , [20] , [21] , [22] , [23] , [24] . This reaction is quite attractive for renewable hydrogen production today and is one of the prominent ways to contribute to the energy transition with cleaner processes.…”

“…These reflections can be studied in a Harrick chamber arranged inside a Praying Mantis accessory, which correspond to very popular couplings in operando experiments for the measurement of physicochemical processes involving gas-solid interfaces [3 , 4 , [8] , [9] , [10] , [11] , 33 , 36] . This configuration allows operating in real reaction conditions on powdered catalysts, employing diffuse reflection to observe the changes on the surface of the molecules in different atmospheres and at certain temperatures [15] .…”

Nanoarchitectonics of Ni/CeO2 Catalysts: The Effect of Pretreatment on the Low-Temperature Steam Reforming of Glycerol

“…According to the previous studie, the oxygen vacancies of CeO 2 can dissociate water and generateabundant surface hydroxyl groups in steam reforming of ethanol, thus increasing the catalytic activity [ 19 ]. Furthermore, CeO 2 is not only used as a redox support to disperse metal nanoparticles but is also used to help oxidize the carbon deposition on the catalyst during the reaction, due to its excellent oxygen storage capacity [ 20 , 21 ]. Pant et al revealed that a lower coke formation and higher stability were obtained of Ni/CeO 2 compared to Ni/Al 2 O 3 catalysts in the steam reforming of glycerol for hydrogen production [ 22 ].…”

Oxidative steam reforming of ethanol over MxLa2−xCe1.8Ru0.2O7−δ (M = Mg, Ca) catalysts: effect of alkaline earth metal substitution and support on stability and activity

“…27 Various metal oxides, such as perovskite, spinel, hydrotalcites, nano-oxyhydride, and pyrochlore, have been reported for OSRE process. [28][29][30][31][32][33][34][35][36] Chen et al investigated the effect of a LaBO 3 (B ¼ Ni, Co, Fe, Mn) perovskite structure on OSRE. The thermal stability and oxygen vacancies affected the catalytic activity and stability for OSRE.…”