![]() ![]() These include the neutron, sonic and density logs. Porosity and lithology of the formation is usually obtained from a combination of logs called the porosity logs. To achieve this task, different logs including resistivity, acoustic and radioactive logs are recorded in the well and well log interpretation is used to obtain the required properties. Since a complete coring and core analysis of the entire pay zone is impractical, well logging appears to be the most plausible mean to obtain such information. depth is essential for accurate estimations. Because of the heterogeneity of most of the reservoirs, a continuous recording of these properties vs. These results provide important insights into manipulating oxygen carrier’s atomic properties for CLC applications.Porosity and fluid saturations are among the most important reservoir properties used in reserve estimates of oil and gas reservoirs. Results show that lower metal-oxygen bond energy and higher oxygen vacancy concentration of doped Bi2O3 led to lower onset temperature, faster reaction rate and smaller activation energy for carbon oxidation. Initiation temperature and reaction kinetics were deduced based on the X-ray diffraction peak intensity change. In-operando synchrotron X-ray diffraction and on-line mass spectrometry enable us to monitor both the phase evolution in the solid as well as the production of gaseous products. In this paper, systematically doped Bi2O3 were synthesized as oxygen carriers for the oxidation of carbon. Yobs vs ycal how to#Here we explore, how to evaluate the relationship between the microscopic properties of an oxygen carrier and its performance in CLC. places many requirements on the oxygen carrier. This process termed chemical looping combustion (CLC), which. An alternative, thermodynamically equivalent approach is to use a metal oxide as an oxygen carrier (oxidizer), and then recycle the carrier following its reduction by exothermic re-oxidation in air. One major technical and economic hurdle on sequestration of CO2, is its separation from nitrogen when fossil fuels are burned in air. The Y analogue displayed the fastest kinetics for oxidation, which may make it the most suitable for oxygen storage and sensing applications. During the cycling experiments all samples exhibited stable reversible oxygen insertion at 600 ☌ with the exception of A=In, which degraded under H2. Yobs vs ycal series#Bond valence sum analysis of the Fe-O bonding across the series reveals that the more underbonded the Fe cation, the more facile the oxygen insertion. These layered oxides underwent various phase transitions above 200 ☌ that included the creation of a superstructure as oxygen incorporates until the maximally oxidized phase is established above ~400 ☌. ![]() The nature of the trivalent A cation affects the oxidation kinetics, thermal cycling stabilities, and oxygen storage capacities, which varied between 2.20-3.13 wt.% ( 0.7-0.98 O2 mmol/g), corresponding an oxygen non-stoichiometry (δ) of ~0.5. ![]() under H2 and O2 atmospheres utilizing in situ synchrotron X-ray diffraction and thermogravimetric analysis (TGA) measurements. To emulate chemical looping conditions, we then monitored their structures and reactivity. We first examined their structures in their pristine state of AFe2O4 with high-resolution synchrotron X-ray diffraction. We have studied the reversible uptake and release of oxygen in the layered metal oxide system AB2O4 for A= Lu, Yb, Y, and In to understand their suitability as oxygen storage materials. The results are discussed in terms of the use of perovskite-type oxides in various areas of research where they are placed in contact with liquid phases of variable temperature and elevated pH. However, ex situ TEM, high energy X-ray diffraction (HXRD), and fluorescence yield Fe K-edge XANES show that the addition of a significant amount of base (K2CO3, 0.1 M) results in the structural degradation of the perovskite support as well as the mobilization of Pd along the sample bed that is dependent on the structure and crystallite size of the perovskite. In situ QEXAFS spectroscopy showed that Pd remains stable and non-reducible in the flowing ethanol/water solvent mixture under. The reactive behaviour of three catalysts based on Pd-loaded LaFeO3 was investigated in terms of the reducibility of Pd and its propensity to leaching into the liquid phase in flowing solutions prototypical of C-C coupling catalysis in a continuous flow reactor cell. ![]()
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