Interaction between iron-based oxygen carrier and four coal ashes during chemical looping combustion

Performance Evaluation of a Chinese Lean Iron Ore as the Oxygen Carrier in Multi and Short-Time Redox Cycles

“…The property of the Fe 2 SiO 4 was stable, which caused the decrease of Fe 2 O 3 and the decline of the reactivity of oxygen carriers. This phenomenon also has been found in previous work [46,47]. Meanwhile, the melting point of Fe 2 SiO 4 is relatively low [46], and the local high temperature from exothermic reaction could lead to the melting of Fe 2 SiO 4 and the sintering of oxygen carriers.…”

“…This phenomenon also has been found in previous work [46,47]. Meanwhile, the melting point of Fe 2 SiO 4 is relatively low [46], and the local high temperature from exothermic reaction could lead to the melting of Fe 2 SiO 4 and the sintering of oxygen carriers. CO introducing time was shortened, the voids on the surface became much larger and the sintering greatly reduced.…”

Influence of Particle Size Distribution on Agglomeration/defluidization of Iron Powders at Elevated Temperature

“…Yiwei ZHONG, 1) * Jintao GAO, 1) Zhi WANG 2) and Zhancheng GUO 1) 1) State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 P. R. China.…”

“…However, the most serious problem of a fluidized-bed reactor at high temperature was defluidization due to particle agglomeration of bed materials. [1][2][3][4][5] The continuous operation and high productivity are often limited by partial or complete defluidization. It is therefore important to understand the behavior of particles in fluidized beds at high temperature.…”

Sewage sludge combustion in a CLC process using nickel-based oxygen carrier

“…However, when the ash content was relatively high, the effect of ash cannot be ignored [29]. Previous investigations have shown that the effect of different ashes on oxygen carrier can vary depending on ash component, ash content, the experimental conditions and the oxygen carrier used [29][30][31][32]. Rubel et al [32] reported the effect of different coal ash on the performance of Fe-based oxygen carrier.…”