TY - JOUR
T1 - PM combustion enhancement to reduce continuous regeneration temperature of fluidized bed type PM removal device using catalyst-doped bed particle
AU - Yokoo, Kento
AU - Kusu, Akitaka
AU - Kishida, Masahiro
AU - Tatebayashi, June
AU - Yamamoto, Tsuyoshi
N1 - Funding Information:
This study was partially supported by the Environment Research and Technology Development Fund 1–1907 of the Environmental Restoration and Conservation Agency of Japan , and the Steel Foundation for Environmental Protection Technology.
Funding Information:
This study was partially supported by the Environment Research and Technology Development Fund 1?1907 of the Environmental Restoration and Conservation Agency of Japan, and the Steel Foundation for Environmental Protection Technology.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/5/15
Y1 - 2020/5/15
N2 - A fluidized bed type PM removal device was developed by focusing on adhesion force as a highly efficient device for PM collection and low-temperature continuous regeneration. To further reduce the continuous regeneration temperature of this device, catalytic PM combustion was investigated. Alkaline and alkaline earth metals (potassium and calcium, respectively) are effective for PM combustion and are among the least expensive catalysts. The positive effects of these catalysts on PM combustion were compared. As their catalytic performances are almost identical, potassium was used for the continuous regeneration of this device. Potassium was doped on the bed particle via the impregnation method. Moreover, the amounts of doped potassium were compared based on the effects of PM combustion on collection efficiency, and the optimum value was determined to be 1.58 g-catalyst/kg-bed particle. Catalyst characterization was conducted via XRD and FTIR analysis of the cleaned gas. K2CO3 is detected on bed particle surface from the XRD patterns. The FTIR results show that potassium promotes PM combustion and selectively enhanced CO2 generation. CO2 is generated from the oxidation of K2CO3 and transformation of K2O2 to K2O with the consumption of PM. K2O is converted to K2CO3 with the re-absorption of CO2. The lowest continuous regeneration temperature decreases to 350 °C with maintaining the collection efficiency 100% owing to the catalytic PM combustion. Furthermore, the effect of water vapor, which is present in exhaust gas, was investigated. It promotes PM combustion and further reduces the continuous regeneration temperature to 330 °C.
AB - A fluidized bed type PM removal device was developed by focusing on adhesion force as a highly efficient device for PM collection and low-temperature continuous regeneration. To further reduce the continuous regeneration temperature of this device, catalytic PM combustion was investigated. Alkaline and alkaline earth metals (potassium and calcium, respectively) are effective for PM combustion and are among the least expensive catalysts. The positive effects of these catalysts on PM combustion were compared. As their catalytic performances are almost identical, potassium was used for the continuous regeneration of this device. Potassium was doped on the bed particle via the impregnation method. Moreover, the amounts of doped potassium were compared based on the effects of PM combustion on collection efficiency, and the optimum value was determined to be 1.58 g-catalyst/kg-bed particle. Catalyst characterization was conducted via XRD and FTIR analysis of the cleaned gas. K2CO3 is detected on bed particle surface from the XRD patterns. The FTIR results show that potassium promotes PM combustion and selectively enhanced CO2 generation. CO2 is generated from the oxidation of K2CO3 and transformation of K2O2 to K2O with the consumption of PM. K2O is converted to K2CO3 with the re-absorption of CO2. The lowest continuous regeneration temperature decreases to 350 °C with maintaining the collection efficiency 100% owing to the catalytic PM combustion. Furthermore, the effect of water vapor, which is present in exhaust gas, was investigated. It promotes PM combustion and further reduces the continuous regeneration temperature to 330 °C.
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U2 - 10.1016/j.cej.2020.124247
DO - 10.1016/j.cej.2020.124247
M3 - Article
AN - SCOPUS:85078825935
VL - 388
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
M1 - 124247
ER -