Influence of wet flue gas desulfurization on the pollutants monitoring in FCC flue gas

Ju, Feng; Wu, Cong; Luan, Hui; Tang, Zhihe; Pan, Helin; Pan, Hui; Xiu, Guangli; Ling, Hao

doi:10.1007/s11356-021-14767-9

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…Two sharp peaks of the Co 3 O 4 /TiO 2 -3DHS catalyst at 667 and 576 cm –1 are indicative of the Co–O vibration . The surface sulfate species of S-Co 3 O 4 /TiO 2 were confirmed by the peaks around 1138 and 1039 cm –1 . − In contrast, the FTIR result of S-Co 3 O 4 /TiO 2 -3DHS did not show a distinct peak at the above vibration frequencies, confirming the weaker adsorption intensity of the Co 3 O 4 /TiO 2 -3DHS catalyst toward SO 2 and suggesting its superior SO 2 tolerance, as further supported by our DFT calculations below.…”

Section: Resultsmentioning

confidence: 96%

Unique Cluster-Support Effect of a Co₃O₄/TiO₂-3DHS Nanoreactor for Efficient Plasma-Catalytic Oxidation Performance

et al. 2023

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For environmental catalysis, a central topic is the design of high-performance catalysts and advanced mechanism studies. In the case of the removal of flue gas pollutants from coal-fired power plants, highly selective nanoreactors have been widely utilized together with plasma discharge characteristics, such as the catalytic oxidation of NO. Herein, a novel reactor with a three-dimensional hollow structure of TiO 2 confining Co 3 O 4 nanoclusters (Co 3 O 4 /TiO 2 -3DHS) has been developed for plasma-catalytic oxidation of NO, whose performance was compared with that of the commercial TiO 2 confining Co 3 O 4 cluster (Co 3 O 4 /TiO 2 ). Specifically, Co 3 O 4 /TiO 2 -3DHS presented a higher efficiency (almost 100%) within lower peak−peak voltage (V P−P ). More importantly, the NO oxidation efficiency was between 91.5 and 94.5% after a long time of testing, indicating that Co 3 O 4 /TiO 2 -3DHS exhibits more robust sulfur and water tolerance. Density functional theory calculations revealed that such impressive performance originates from the unique cluster-support effect, which changes the distribution of the active sites on the catalyst surface, resulting in the selective adsorption of flue gas. This investigation provides a new strategy for constructing a three-dimensional hollow nanoreactor for the plasma-catalytic process.

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Section: Resultsmentioning

confidence: 96%

Unique Cluster-Support Effect of a Co₃O₄/TiO₂-3DHS Nanoreactor for Efficient Plasma-Catalytic Oxidation Performance

et al. 2023

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“…2are about 980, 630, and 500 cm -1 , and the vibration frequencies of SO 4 2are about 1210-1025, 1000-950, 620, and 460 cm -1 . [27][28][29][30] The FTIR spectrum after the reaction did not show a distinct peak at the above vibration frequencies. The results showed that the three catalysts with hetero-shelled hollow structures have good SO 2 tolerance.…”

Section: Resultsmentioning

confidence: 99%

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Liao

Zhao

Yang

et al. 2022

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environmental compatibility. [2] However, the coexistence of NO and SO 2 in the flue gas makes the deactivation of the traditional catalysts, due to the competition adsorption of SO 2 and NO on the active sites of the catalyst surface, resulting in the change of catalyst structure and the decrease of NO conversion efficiency.Recently, many researchers have been focused on tuning the structures of the catalysts to avoid the poison effect caused by SO 2 . The design of active components with the construction of a unique hollow structure presents the enhanced catalytic performance on NO oxidation with the existence of SO 2 . [3] The cavity confinement effect of the hollow nanoreactor could realize the impact on the unique electronic and geometric structure for enhancing the charge transfer and separation in the temporal-spatial catalytic process. [4] The charge transfer induced by the hetero-shelled hollow structure may change the catalytic activity and selectivity. [5] Besides, more interesting catalysts have been developed and applied to NO oxidation, such as composites structure control from one dimensional to three dimensional, [6,7] surface active site including defects engineering, [8,9] and catalytic sites tuning on synergetic conversion. [2,10] Non-thermal plasma(NTP) technology has attracted lots of research attention for NO catalytic removal. [11] The combination of NTP and catalyst can promote the formation of reaction intermediates on the catalyst surface, thus reducing the activation energy of the reaction, and achieving the rapid selective catalytic oxidation of NO at low temperatures. [12][13][14][15] In fact, many researchers attentions have been paid to tune the engineering parameters of the NTP and the advanced catalyst structure design without exploring the synergetic effect on the temporal-spatial structure, which may induce spatial charge rearrangement and trigger the micro-domain surficial species reaction. For instance, Cui et al. [16] studied the process of simultaneous oxidation of NO and SO 2 using non-thermal plasma coupled with catalyst on engineering parameters control. They found that the oxidation efficiency of both NO and SO 2 could be significantly improved in conjunction with further oxidation by the wet electrostatic precipitator (WESP). Furthermore, because of the unique properties of the hetero-shelled hollow structure catalyst, it may also be easier to produce synergistic Facilitating the mass transfer and spatial charge separation is a great challenge for achieving efficient oxidation of NO and outstanding sulfur resistance. Herein, a hydrothermal-assisted confinement growth technique is used to fabricate well-defined three-dimensional CuOx@MnOx hetero-shelled hollow-structure catalysts. By integrating the coupled plasma space reactor and the porous hierarchical structure of the catalyst, excellent stability (10 h) and high conversion of NO (93.86%) are reached under the concentration of SO 2 (1000 mg m -3 ) and NO (200 mg m -3 ). Impressively, precise surface characterization ...

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“…The emission characteristics indicated water vapor in the flue gas, which indirectly leads to large quantities of salt pollutants entrained in the flue gas. The EGA-MS analysis showed that nitrate sulfate could be decomposed and ammonia, SO 2 , and water vapor are released as reaction products in the form of gas [ 270 , 271 ].…”

Section: Applications To Sulfurmentioning

confidence: 99%

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

et al. 2022

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Advances in on-line thermally induced evolved gas analysis (OLTI-EGA) have been systematically reported by our group to update their applications in several different fields and to provide useful starting references. The importance of an accurate interpretation of the thermally-induced reaction mechanism which involves the formation of gaseous species is necessary to obtain the characterization of the evolved products. In this review, applications of Evolved Gas Analysis (EGA) performed by on-line coupling heating devices to mass spectrometry (EGA-MS), are reported. Reported references clearly demonstrate that the characterization of the nature of volatile products released by a substance subjected to a controlled temperature program allows us to prove a supposed reaction or composition, either under isothermal or under heating conditions. Selected 2019, 2020, and 2021 references are collected and briefly described in this review.

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Influence of wet flue gas desulfurization on the pollutants monitoring in FCC flue gas

Cited by 8 publications

References 14 publications

Unique Cluster-Support Effect of a Co₃O₄/TiO₂-3DHS Nanoreactor for Efficient Plasma-Catalytic Oxidation Performance

Unique Cluster-Support Effect of a Co₃O₄/TiO₂-3DHS Nanoreactor for Efficient Plasma-Catalytic Oxidation Performance

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

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Influence of wet flue gas desulfurization on the pollutants monitoring in FCC flue gas

Cited by 8 publications

References 14 publications

Unique Cluster-Support Effect of a Co3O4/TiO2-3DHS Nanoreactor for Efficient Plasma-Catalytic Oxidation Performance

Unique Cluster-Support Effect of a Co3O4/TiO2-3DHS Nanoreactor for Efficient Plasma-Catalytic Oxidation Performance

Hetero‐Shelled Hollow Structure Coupled with Non‐Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

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Unique Cluster-Support Effect of a Co₃O₄/TiO₂-3DHS Nanoreactor for Efficient Plasma-Catalytic Oxidation Performance

Unique Cluster-Support Effect of a Co₃O₄/TiO₂-3DHS Nanoreactor for Efficient Plasma-Catalytic Oxidation Performance