Development of Red Mud Coated Catalytic Filter for NOx Removal in the High Temperature Range of 300–450 °C

Huangfu, Lin; Abubakar, Abdullahi; Liu, Changming; Li, Yunjia; Wang, Chao; Gao, Shiqiu; Liu, Zhouen; Yu, Jian

doi:10.1007/s10562-019-02953-x

Cited by 24 publications

(9 citation statements)

References 36 publications

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“…As the temperature increased, the inhibition effect of H2O decreased and even enhanced the NO conversion above 300 °C. Notably, the dramatic decrease of N2O concentration observed, indicating the addition of H2O restrains the oxidation of NH3 at high temperature [22,31]. These results indicate that the presence of H2O in the real flue gas may have dramatically weakened the undesirable oxidation of NH3 and promoted the SCR selectivity.…”

Section: The Effect Of H2o and So2mentioning

confidence: 79%

“…It can be observed that the addition of H 2 O notably weakened the NO conversion below 250 • C, which was ascribed to the severe competitive adsorption of H 2 O and NH 3 at low temperatures [29,30]. As the temperature increased, the inhibition effect of H 2 O decreased and even enhanced the NO conversion above 300 • C. Notably, the dramatic decrease of N 2 O concentration observed, indicating the addition of H 2 O restrains the oxidation of NH 3 at high temperature [22,31]. These results indicate that the presence of H 2 O in the real flue gas may have dramatically weakened the undesirable oxidation of NH 3 and promoted the SCR selectivity.…”

Section: The Effect Of H 2 O and Somentioning

confidence: 98%

“…Up to now, great progress has been achieved for the development of an effective catalytic filter with high catalytic activity and low-pressure drop. Different active components including Cu- [17,18], V- [19][20][21], Fe-based [22] catalytic filters as well as different blank filter materials [23] have been tried to improve their removal efficiency based on small filter samples (L500 mm × Φ60 mm) in the lab. Our previous work also developed a highly active V-based catalyst loaded in different ceramic filters [24], which displayed above 90% NO conversion in the temperature range of 250-450 • C. In particular, pilot tests of small-size catalytic filters (L1500 mm × Φ60 mm) were also done by Heidenreich [14], indicating the promising industrial application prospect of the catalytic filter.…”

Section: Introductionmentioning

confidence: 99%

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The Denitration and Dedusting Behavior of Catalytic Filter and Its Industrial Application in Glass Kilns

et al. 2020

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The development of efficient materials and processes is a long-term goal for the integrated flue gas purification in industry. In this study, a large-size V-based catalytic filter (L3000 mm × Φ150 mm) was prepared by loading the catalyst emulsion into a blank filter, which demonstrated excellent performance for simultaneously removing NOx, SOx and dust. The laboratory investigation found that the small catalytic particles, high catalyst loading and low face velocity could improve the DeNOx efficiency, and above 80% NO conversion could be achieved in the temperature range of 250–400 °C on the condition of <300 nm catalytic particle size, >7.41 wt % catalyst loading and <1.00 Nm/min face velocity. The negative effect of SO2/H2O was only observed below 300 °C, and the dust had little negative effects on DeNOx efficiency except for the increase of pressure drop. Moreover, a 90-day industrial test of 2380 catalytic filters over 100,000 Nm3/h of flue gas (0.50 Nm/min) from a glass kiln demonstrated that the removal efficiency of both NOx and SOx could be maintained above 95% with great stability at 320–350 °C, and 99% dust could be removed with a pressure drop of less than 1.40 KPa. The results reported herein indicate the promising application prospect of large-size V-based catalytic filters for integrated flue gas purification in industry.

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Section: The Effect Of H2o and So2mentioning

confidence: 79%

Section: The Effect Of H 2 O and Somentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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The Denitration and Dedusting Behavior of Catalytic Filter and Its Industrial Application in Glass Kilns

et al. 2020

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“…For TiO 2 -based systems with a higher VOx content vs. WO 3 (1:0 and 7:3, respectively), NOx conversion is slightly higher by 1.8-2.4% than the analogous ZnO-based systems (Table 1, entries 2 and 3 vs. 8 and 9). The opposite tendency was observed for the systems with VOx to WO 3 ratios of 1:1, 3:7, and 0:1 (Table 1, entries 4-6 vs. [10][11][12]. The screen of the systems in Table 1 allowed us to optimize the molar ratio of the WOx to VOx.…”

Section: Catalyst Performance In Scr Reactionmentioning

confidence: 95%

“…This study investigated a collection of ceramic foams as potential catalysts for selective catalytic NOx reduction (SCR) reactions. Despite potential advantages, the literature rarely describes the application of ceramic foams in SCR catalysis [9][10][11]. The availability of the commercial honeycomb or plate SCR catalysts may be one reason for this fact.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Removal of NOx on Ceramic Foam-Supported ZnO and TiO2 Nanorods Ornamented with W and V Oxides

et al. 2022

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Energy consumption steadily increases and energy production is associated with many environmental risks, e.g., generating the largest share of greenhouse gas emissions. The primary gas pollution concern is CO2, CH4, and nitrogen oxides (NOx). Environmental catalysis plays a pivotal role in NOx mitigation (DeNOx). This study investigated, for the first time, a collection of ceramic foams as potential catalyst support for selective catalytic NOx reduction (SCR). Ceramic foams could be an attractive support option for NOx removal. However, we should functionalize the surface of raw foams for such applications. A library of ceramic SiC, Al2O3, and ZrO2 foams ornamented with nanorod ZnO and TiO2 as W and V oxide support was obtained for the first time. We characterized the surface layer coating structure using the XPS, XRF and SEM, and TEM microscopy to optimize the W to V molar ratio and examine NO2 mitigation as the SCR model, which was tested only very rarely. Comparing TiO2 and ZnO systems reveals that the SCR conversion on ZnO appeared superior vs. the conversion on TiO2, while the SiC-supported catalysts were less efficient than Al2O3 and ZrO2-supported catalysts. The energy bands in optical spectra correlate with the observed activity rank.

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Stability studies of PtSn structured catalysts supported on thin layers of MAl₂O₄ (M: Mg, or Zn) for paraffins dehydrogenation reactions

2022

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In order to determine the catalytic stability, PtSn structured catalysts supported on thin films of MgAl 2 O 4 or ZnAl 2 O 4 deposited on α-Al 2 O 3 spheres were studied through five reaction-regeneration cycles in the n-butane dehydrogenation. Bimetallic catalysts show good catalytic stability along the five reaction-regeneration cycles. Among the different synthesized catalysts, the PtSn/Sp-Zn-CN catalyst showed the best catalytic behaviour, showing very good values of yields to butenes and excellent catalytic stability along the cycles, even better than the one of a structured commercial catalyst used industrially for the dehydrogenation of paraffins. The characterization results by temperature-programmed reduction and X-ray photoelectron spectroscopy showed some modifications in the metallic phase of the catalysts after the cycles, mainly in the Sn/Pt surface ratios and in segregation effects in some catalysts. However, the transmission electron microscopy (TEM) results are conclusive in the sense that, after the cycles, the bimetallic catalysts maintained a very high proportion of particles with sizes between 1-2 nm, and therefore, preserved a high metallic dispersion. K E Y W O R D S catalytic stability, MgAl 2 O 4 , n-butane dehydrogenation, PtSn structured catalysts, ZnAl 2 O 4

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Development of Red Mud Coated Catalytic Filter for NOx Removal in the High Temperature Range of 300–450 °C

Cited by 24 publications

References 36 publications

The Denitration and Dedusting Behavior of Catalytic Filter and Its Industrial Application in Glass Kilns

The Denitration and Dedusting Behavior of Catalytic Filter and Its Industrial Application in Glass Kilns

Catalytic Removal of NOx on Ceramic Foam-Supported ZnO and TiO2 Nanorods Ornamented with W and V Oxides

Stability studies of PtSn structured catalysts supported on thin layers of MAl₂O₄ (M: Mg, or Zn) for paraffins dehydrogenation reactions

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Development of Red Mud Coated Catalytic Filter for NOx Removal in the High Temperature Range of 300–450 °C

Cited by 24 publications

References 36 publications

The Denitration and Dedusting Behavior of Catalytic Filter and Its Industrial Application in Glass Kilns

The Denitration and Dedusting Behavior of Catalytic Filter and Its Industrial Application in Glass Kilns

Catalytic Removal of NOx on Ceramic Foam-Supported ZnO and TiO2 Nanorods Ornamented with W and V Oxides

Stability studies of PtSn structured catalysts supported on thin layers of MAl2O4 (M: Mg, or Zn) for paraffins dehydrogenation reactions

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Product

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Stability studies of PtSn structured catalysts supported on thin layers of MAl₂O₄ (M: Mg, or Zn) for paraffins dehydrogenation reactions