Non-isothermal carbothermic reduction kinetics of calcium ferrite and hematite as oxygen carriers for chemical looping gasification applications

Pyrolysis Behavior of Pyrite under a CO–H2 Atmosphere

“…The schematic diagram of the thermo-gravimetric analyzer is similar to that of the previous study. 12 , 22 − 25 The reacted gas in the thermo-gravimetric analyzer was blown into a quadrupole mass spectrometer (TILON LC-D200, AMETEK LLC, USA) to detect its components according to the molecular weight. The electron ionization voltage, the temperature of the transfer line, and the m / z range of the mass spectrometer are 10–70 eV, 270 °C, and 1–200, respectively.…”

“…The pyrolysis of pyrite was carried out in a thermo-gravimetric analyzer (Setaram Evo TG-DTA 1750) consisting of a vertical furnace, a gas manometer system for controlling the atmosphere in the reactor, and an electronic balance connected to a computer that records the mass loss. The schematic diagram of the thermo-gravimetric analyzer is similar to that of the previous study. ,− The reacted gas in the thermo-gravimetric analyzer was blown into a quadrupole mass spectrometer (TILON LC-D200, AMETEK LLC, USA) to detect its components according to the molecular weight. The electron ionization voltage, the temperature of the transfer line, and the m / z range of the mass spectrometer are 10–70 eV, 270 °C, and 1–200, respectively.…”

Andradite titanium: Preparation, characterization and metallurgical performance

“…CFs are acknowledged as superior bonding phases in fluxed sinters with relatively high compressive strength. In this study, the compressive strength of the CF sample synthesized by solid-state sintering 33 was tested (SANS CMT-5150) and compared with that of AT. The samples were first heated from room temperature to 1573 K, held for 1 h in an alumina crucible, and then cooled under an air atmosphere.…”

Surface Structures of CaFe₂O₄ (001), (100), (110) and (111): A Density Functional Theory Study

“…Moreover, the reduction behavior of calcium ferrite minerals under CO and H 2 were also investigated. [7][8][9][10][11][12] In addition, in recent research, it has been widely applied including as a thermal catalyst for decreasing the NOx emission in the sintering process, [13][14][15] as a photocatalytic for degradation of the organic wastewater 16,17) and volatile organic compounds, [18][19][20] as a photocathode for producing hydrogen in water splitting, [21][22][23] as a oxygen carrier for chemical looping gasification applications, [24][25][26][27][28] as a anode material for lithiumion batteries 29) and as a visible light activated gas sensor. 30) The surface structure of calcium ferrite affects the strength of sinter and reduction reaction of it with CO and H 2 in the blast furnace.…”