TY - JOUR
T1 - Suppressing Ammonia Re-Emission with the Aid of the Co3O4-NPs@KIT-6 Catalyst in Ammonia-Based Desulfurization
AU - Qi, Tieyue
AU - Wang, Lidong
AU - Wang, Yuguo
AU - Xing, Lei
AU - Zhang, Lin
AU - Liu, Jie
AU - Xiao, Huining
AU - Zhang, Shihan
N1 - The present work is supported by the National Key Research and Development Program of China (nos. 2017YFC0210201 and 2016YFC0204102), China Scholarship Council (201806730036), Key Project of Hebei Natural Science Foundation (no. E2019502199), Key Science and Technology Program of Hebei (19074013Z), and the National Natural Science Foundation of China (no. 51878273). This paper was edited by Wallace Academic Editing
The present work is supported by the National Key Research and Development Program of China (nos. 2017YFC0210201 and 2016YFC0204102), China Scholarship Council (201806730036), Key Project of Hebei Natural Science Foundation (no. E2019502199), Key Science and Technology Program of Hebei (19074013Z), and the National Natural Science Foundation of China (no. 51878273). This paper was edited by Wallace Academic Editing.
PY - 2019/11/19
Y1 - 2019/11/19
N2 - The re-emission of NH3 and SO2 caused by the decomposition of (NH4)2SO3 is a crucial concern in ammonia-based desulfurization. In this study, a novel Co3O4-NPs@KIT-6 catalyst with a three-dimensional two-helix structure is proposed for converting (NH4)2SO3 into (NH4)2SO4. The oxidation rate of (NH4)2SO3 with the catalyst was 7.5 times that without any catalyst, and this improvement was attributed to appropriately dispersed Co3O4 nanoparticles with a size of 4-10 nm that interacted with the KIT-6 support. Therefore, the number of active sites with substitution and hole defects was substantially increased, which is advantageous for high catalytic activities. Consequently, the amount of NH3 and SO2 re-emission during (NH4)2SO3 oxidation was reduced by 43.9%, which considerably reduced potential environmental risks. The results of this study serve to advance ammonia desulfurization by improving the desulfurization efficiency, downsizing the oxidation tank, and generating considerable profit from efficient reclaiming of (NH4)2SO4 as a fertilizer.
AB - The re-emission of NH3 and SO2 caused by the decomposition of (NH4)2SO3 is a crucial concern in ammonia-based desulfurization. In this study, a novel Co3O4-NPs@KIT-6 catalyst with a three-dimensional two-helix structure is proposed for converting (NH4)2SO3 into (NH4)2SO4. The oxidation rate of (NH4)2SO3 with the catalyst was 7.5 times that without any catalyst, and this improvement was attributed to appropriately dispersed Co3O4 nanoparticles with a size of 4-10 nm that interacted with the KIT-6 support. Therefore, the number of active sites with substitution and hole defects was substantially increased, which is advantageous for high catalytic activities. Consequently, the amount of NH3 and SO2 re-emission during (NH4)2SO3 oxidation was reduced by 43.9%, which considerably reduced potential environmental risks. The results of this study serve to advance ammonia desulfurization by improving the desulfurization efficiency, downsizing the oxidation tank, and generating considerable profit from efficient reclaiming of (NH4)2SO4 as a fertilizer.
UR - https://www.scopus.com/pages/publications/85074907300
UR - https://www.scopus.com/pages/publications/85074907300#tab=citedBy
U2 - 10.1021/acs.est.9b03060
DO - 10.1021/acs.est.9b03060
M3 - Article
C2 - 31647228
AN - SCOPUS:85074907300
SN - 0013-936X
VL - 53
SP - 13477
EP - 13485
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 22
ER -