Simultaneous removal of NOx and SO2 with H2O2 over silica sulfuric acid catalyst synthesized from fly ash

Cui, Rongji; Ma, Suxia; Yang, Bingchuan; Li, Shicheng; Pei, Ting; Li, Jing; Wang, Jie; Sun, Shujun; Mi, Chenfeng

doi:10.1016/j.wasman.2020.04.049

Cited by 24 publications

(6 citation statements)

References 43 publications

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“…The FT-IR and Xps spectra of catalysts are shown in Figure 1a,b. In the FT-IR spectra, the bands at 455, 559, and 1092 cm −1 in CFA and S/Al-CFA were attributed to Si-O-Si, O-Si-O, and Si-O-Al stretching, respectively [38]. The FT-IR spectrum of S/Al-CFA in the 3468 cm −1 band was the Al-OH stretching vibrations peak.…”

Section: Characterization Of Catalystsmentioning

confidence: 92%

Functionalized Coal Fly Ash Is an Efficient Catalyst for Synthesizing Furfural from Xylose at a Low Catalyst Load

Li,

Wang,

Liu

et al. 2023

Catalysts

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In this study, coal fly ash was functionalized, using a simple one-step process (loading with Al3+ and sulfonation), to yield a solid acid catalyst (S/Al-CFA) with strong acid sites. The catalyst was then used to produce furfural from xylose in a biphasic system (H2O(NaCl)/tetrahydrofuran). The furfural yield reached 82% at 180 °C–60 min with catalyst/xylose ratio of 0.2:1.0 (w/w). With the reaction completed, all of the components could be effectively separated, and the furfural was 97.6% pure. The cycle and regeneration of the catalyst were evaluated, and the catalyst deactivation mechanism was investigated.

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Section: Characterization Of Catalystsmentioning

confidence: 92%

Functionalized Coal Fly Ash Is an Efficient Catalyst for Synthesizing Furfural from Xylose at a Low Catalyst Load

Li,

Wang,

Liu

et al. 2023

Catalysts

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“…The conversion percentage of NOx removal in RFA only reached 10.39%, occurring after the initial value (first 15 minutes) of the NOx removal test. The low performance of NOx adsorption on RFA was due to the physical properties of fly ash, which are not reactive to NOx without active agents (Cui et al, 2020). Therefore, it is necessary to increase the amount of metal oxides as an active substance to increase NOx adsorption into the pores of the fly ash.…”

Section: Effects Of Metal Oxides Loading Over Fly Ash For Nox Removalmentioning

confidence: 99%

Modification of Recycled Industrial Solid Waste Incineration Fly Ash as a Low-cost Catalyst for NOx Removal

Darmansyah,

You,

Wang

2024

Aerosol Air Qual. Res.

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Fly ash is solid waste from incinerators that contains complex compounds that have great potential to synthesize valuable materials. This study devises synthesizing a low-cost catalyst from recycled fly ash using a combination of metal oxides (ZrO2, TiO2, and MgO) to remove NOx. This study also investigated the impact of various factors on the synergetic purification of NOx as an air pollution emission. Microscopic characterization showed that increasing the composition of metal oxides can increase the specific surface area of fly ash, crystallinity, binding energy, and the dispersion of metal oxides into the fly ash, favoring the adsorption and the oxidation of NOx onto the surface-modified fly ash catalysts. The NOx removal in raw fly ash (RFA) at 25°C is 10.39%, increasing to 90.3% in the modified fly ash catalyst (FA/Zr-10%) at 250°C. The modified fly ash catalysts can reduce catalyst costs for NOx removal by one-ninth, and the operating temperature is about 10-15% lower than conventional catalysts. In summary, industrial solid waste incineration fly ash holds excellent potential when modified with metal oxides, serving as an economical and highly efficient catalyst for NOx removal.

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“…Wax ester synthesis reactions are usually catalyzed by toxic and corrosive chemical compounds such as hydrofluoric acid and sulfuric acid (Esfandmaz et al, 2018). The disadvantages of processes catalyzed by strong acids are high reaction temperatures, difficult separation of reaction media, low yields and environmental concerns (Cui et al, 2020). However, the enzymatic route has proved attractive for the production of these esters because it is a process with low energy consumption, high productivity, and good stability compared to organic solvents (Bandikari et al, 2018), in addition to having broad substrate specificity and exhibiting high enantioselectivity (Benamia et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Candida rugosa lipase immobilized on hydrophobic support Accurel MP 1000 in the synthesis of emollient esters

et al. 2021

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Simultaneous removal of NOx and SO2 with H2O2 over silica sulfuric acid catalyst synthesized from fly ash

Cited by 24 publications

References 43 publications

Functionalized Coal Fly Ash Is an Efficient Catalyst for Synthesizing Furfural from Xylose at a Low Catalyst Load

Functionalized Coal Fly Ash Is an Efficient Catalyst for Synthesizing Furfural from Xylose at a Low Catalyst Load

Modification of Recycled Industrial Solid Waste Incineration Fly Ash as a Low-cost Catalyst for NOx Removal

Candida rugosa lipase immobilized on hydrophobic support Accurel MP 1000 in the synthesis of emollient esters

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