De-SOx catalyst: the role of iron in iron mixed solid solution spinels, MgO.cntdot.MgAl2-xFexO4

Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials

“…The Mg-Fe-oxides solid solution was synthesized by calcination at 732°C in air from J.S. Yoo et al [39]. A.B.…”

De‐SOX Performance of Spinels Containing Manganese

“…Therefore, one of the current development trends in the refining industry is to remove sulfur oxide in the processing of FCC raw materials to meet the requirements of industrial smoke‐gas treatment. In researches 1–4 on raw oil with relatively high sulfur content, it was found that the sulfur content in raw oil rises, the concentration of sulfur dioxide and sulfur trioxide in the FCC regenerator flue gas substantially increases, the trend of coke formation for cracking becomes progressively severe, the structure and nature of products are changing, and the devices are corroded severely. All these factors exacerbate the environmental pollution, which is actually one of causes of hazy weather.…”

“…Based on the current reports on sulfur transfer agents, this study focuses on two aspects: (i) enhancing the oxidation capacity of the sulfur transfer agent, i.e., add cerium and vanadium as the active oxidation component to increase the oxidation speed of sulfur dioxide to sulfur trioxide; (ii) improving the reducing property of the sulfur transfer agent. Sulfur transfer agents at early stage 2, 5 are mainly Al 2 O 3 , MgO, or its composition loading cerium. As CeO 2 mostly exists in a free state, the sulfur dioxide is oxidated and Ce 4+ is reduced to Ce 3+ .…”

Improving the SO2 absorption rate of CeFeMg-based sorbent promoted with titanium promoter

“…It is known that basic oxides like magnesium oxide in the presence of an oxidant promoter like CeO 2 have very high potential for SO 2 removal following reactions (1) and (2). Different material promoters such as V, Ce, Co and Pt have been claimed as SO 2 oxidation promoters [4][5][6][7], but CeO 2 is the most commonly used today [8][9][10][11][12]. Numerous materials have been proposed for removing SO x .…”

“…Even in these cases, however, the MgSO 4 formed during SO 2 absorption is very stable and it has not been completely regenerated under the cracking conditions. Recently, Hydrotalcite type or Magnesium rich hydrotalcite material promoted with various metal oxides such as Ce, Fe, Cu, Mn, Li, Pt and Zn have been used [4,[8][9][10][13][14][15][16][17][18][19]. In the previous research, the CeFeMg sorbent showed a high sulfur removal capac- ity.…”