Promoting effect of nitration modification on activated carbon in the catalytic ozonation of oxalic acid

Cao, Hongbin; Xing, Lidan; Wu, Guangguo; Xie, Yongbing; Shi, Shaoyuan; Zhang, Yi; Minakata, Daisuke; Crittenden, John C.

doi:10.1016/j.apcatb.2013.05.006

Cited by 101 publications

(44 citation statements)

References 32 publications

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“…tert-Butanol does not adsorb onto solid materials including activated carbon (Fan et al, 2014). Therefore, the significantly reduction of amoxicillin degradation at the presence of tert-butanol confirms that the oxidation of amoxicillin with • OH in the bulk solution considerably contributed (47 from 82%) in degradation of amoxicillin in the COPs, especially COP/NAC (Guzman-Perez et al, 2011;Cao et al, 2014;Fan et al, 2014). Fig.…”

Section: Effect Of Radical Scavengerssupporting

confidence: 70%

“…The degradation of amoxicillin decreased from 59.4 to 41.8% for SOP, from 83.3 to 34.7% for COP/NAC and from 46.8 to 26.5% for COP/SAC in the presence of tert-butanol. Since tert-butanol reacts strongly with • OH (Dai et al, 2014), applying tert-butanol to COPs is an effective method of confirming the main reaction mechanism (Cao et al, 2014) and is an accepted indicator for checking the presence of a radical type reaction (Nie et al, 2014). The strong decrease in degradation of amoxicillin in the presence of tert-butanol verifies the generation of • OH ( competed with the amoxicillin molecules to react with • OH in the solution bulk and hindered the oxidation of amoxicillin (Moussavi et al, 2013a).…”

Section: Effect Of Radical Scavengersmentioning

confidence: 94%

“…The increase in amoxicillin degradation in the presence of SAC and NAC can be explained by the active interaction of ozone molecules on the acid Lewis sites and the functional -OH groups present on the surface of the activated carbons, which increased decomposition and production • OH (Faria et al, 2008;Ma et al, 2014). Solution pH significantly affected the catalytic potential of the activated carbon to initiate the formation of increase its catalytic activity (Cao et al, 2014). It can be concluded that NAC has a higher potential than the SAC for catalysis of ozonation of antibiotics, suggesting that NAC can be efficiently applied in an ozonation reactor to increase the rate of oxidation.…”

Section: Effect Of Initial Solution Phmentioning

confidence: 99%

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Investigating the potential of carbon activated with NH4Cl for catalyzing the degradation and mineralization of antibiotics in ozonation process

Moussavi

Alahabadi

Yaghmaeian

2015

Chemical Engineering Research and Design

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Section: Effect Of Radical Scavengerssupporting

confidence: 70%

Section: Effect Of Radical Scavengersmentioning

confidence: 94%

Section: Effect Of Initial Solution Phmentioning

confidence: 99%

See 1 more Smart Citation

Investigating the potential of carbon activated with NH4Cl for catalyzing the degradation and mineralization of antibiotics in ozonation process

Moussavi

Alahabadi

Yaghmaeian

2015

Chemical Engineering Research and Design

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“…Acidification pretreatment of AC was performed according to the reported method as follows [38,39]: 5 g AC was slowly put into the 100 mL nitric acid solution (5 mol L −1 ) at ambient temperature; the mixture was refluxed and condensed at 60 °C for 8 h; then, the resultant was filtrated and washed until the filtrate was neutral; finally the product was desiccated at 110 °C for 14 …”

Section: Acidification Pretreatment Of Acmentioning

confidence: 99%

Activated Carbon-Supported Tetrapropylammonium Perruthenate Catalysts for Acetylene Hydrochlorination

Zhang

Man

et al. 2017

Catalysts

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Abstract:The Ru-based catalysts, including Ru/AC (activated carbon), TPAP (tetrapropylammonium perruthenate)/AC, TPAP/AC-HNO 3 , and TPAP/AC-HCl, were prepared and assessed for the direct synthesis of vinyl chloride monomer. The results indicate that the TPAP/AC-HCl catalyst exhibits the best performance with the conversion falling from 97% to 91% in 48 hours' reaction under the conditions of 180 • C, a GHSV(C 2 H 2 ) of 180 h −1 , and the feed ratio V HCl /V C2H2 of 1.15. The substitution of RuCl 3 precursor with high valent TPAP species leads to more ruthenium oxides active species in the catalysts; the acidification treatment of carrier in TPAP/AC catalyst can produce an enhanced interaction between the active species and the modified functional groups on the carrier, and it is beneficial to inhibit the carbon deposition and sintering of ruthenium species in the reaction process, greatly increase the adsorption ability of reactants, and further increase the amount of dominating active species in the catalysts, thus improving the catalytic performance. This also provides a promising strategy to explore high efficient and economic mercury-free catalysts for the hydrochlorination of acetylene.

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“…ACs can be modified to improve their structural properties and thus promote their adsorption performance. The methods of modifying the structural properties of ACs include mainly physical methods (Á lvarez-Torrellas et al, 2017), chemical methods (Cao et al, 2014), and the combination of the two methods (Bhatnagar et al, 2013;RiveraUtrilla et al, 2011). Modification enables the specific surface area of ACs to be greatly enlarged by forming an elaborate pore structure.…”

Section: Introductionmentioning

confidence: 99%

Behavior of activated carbons by compound modification in high gravity for toluene adsorption

Guo

Liu

et al. 2017

Adsorption Science & Technology

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The rotating packed bed is a chemical apparatus that strengthens mass transfer between phases to enhance their reactivity. It can be used to modify adsorbent materials, greatly improving their chemical properties. This article studies the effect of compound modification of activated carbons in a high-gravity environment on their toluene adsorption. The compound modification includes physical (N 2 ) and chemical modification (HNO 3 ), and the effect of modification is compared between traditional fixed-bed and rotating packed bed modification. The physical characteristics of the activated carbons, including pore size, specific surface area, and morphology are tested by Brunauer-Emmett-Teller and scanning electron microscopy, and the surface functional groups of the activated carbons are determined by Fourier transform infrared spectroscopy and Boehm titration. The results indicate that the activated carbons modified by rotating packed bed have a larger specific surface area (871.5 m 2 /g) and smaller pore size (0.524 nm), and the content of acidic oxygen-containing groups is 1.5 times that of unmodified activated carbons. The adsorption capacity of the activated carbons compound-modified by rotating packed bed increases by 69% compared with the unmodified activated carbons. The adsorption by the rotating packed bed-compoundmodified activated carbons obeys the Freundlich model. The modification of activated carbons by rotating packed bed greatly enhances their specific surface area, pore size, and surface content of oxygen-containing functional groups, markedly improving the adsorption performance and increasing the utilization rate.

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Promoting effect of nitration modification on activated carbon in the catalytic ozonation of oxalic acid

Cited by 101 publications

References 32 publications

Investigating the potential of carbon activated with NH4Cl for catalyzing the degradation and mineralization of antibiotics in ozonation process

Investigating the potential of carbon activated with NH4Cl for catalyzing the degradation and mineralization of antibiotics in ozonation process

Activated Carbon-Supported Tetrapropylammonium Perruthenate Catalysts for Acetylene Hydrochlorination

Behavior of activated carbons by compound modification in high gravity for toluene adsorption

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