Adsorption of low concentration phosphine in yellow phosphorus off-gas by impregnated activated carbon

Wang, Xueqian; Ning, Ping; Shi, Yan; Ming, Jiang

doi:10.1016/j.jhazmat.2009.06.046

Cited by 54 publications

(40 citation statements)

References 10 publications

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“…The "breakthrough time" is defined as the time required for the COS outlet concentration to reach 10% of the inlet concentration in the determination of breakthrough curves. After the experiment was completed, the COS adsorption capacity was calculated with the corresponding integral according to formula (3) under various conditions of the breakthrough curves [24].…”

Section: Cos Breakthrough Measurementsmentioning

confidence: 99%

Adsorption/desorption of low concentration of carbonyl sulfide by impregnated activated carbon under micro-oxygen conditions

Wang

Qiu

Ning

et al. 2012

Journal of Hazardous Materials

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Section: Cos Breakthrough Measurementsmentioning

confidence: 99%

Adsorption/desorption of low concentration of carbonyl sulfide by impregnated activated carbon under micro-oxygen conditions

Wang

Qiu

Ning

et al. 2012

Journal of Hazardous Materials

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“…In this study, we explicitly analyzed the speciation and chemical environments of the Cu/TiO 2 both before and after PH 3 capture and proposed a new mechanism for the reactions between the PH 3 and CuO/Cu(OH) 2 . The CuO and Cu(OH) 2 were reduced to Cu 0 while they oxidized PH 3 into PO 4 3-in N 2 . The reactions can be expressed as:…”

Section: ' Discussionmentioning

confidence: 99%

“…This property motivates researchers to oxidize PH 3 using reducible species. From the impregnation of activated carbons with HCl, Wang et al 4 found an increased adsorption capacity for PH 3 . They supposed that the HCl present in the small pores of the activated carbon acts as a catalyst to oxidize the adsorbed PH 3 into H 3 PO 4 and P 2 O 5 .…”

mentioning

confidence: 99%

Chemical Capture of Phosphine by a Sol−Gel-Derived Cu/TiO₂ Adsorbent − Interaction Mechanisms

Chang

Hsu²,

Chan

2011

J. Phys. Chem. C

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In this study, a novel sol-gel-derived Cu/TiO 2 adsorbent has been demonstrated to exhibit exceptional capacities of 40.62, 49.52, and 108.48 mg PH 3 /g Cu/TiO 2 for the oxidative capture of phosphine (PH 3 ) in N 2 , air, and humidified air, respectively. We have proposed the oxidative mechanisms for PH 3 on the Cu/TiO 2 sample on the basis of elemental, chemical state, functional group, and microstructural analysis. Moreover, the influence of O 2 and water vapor on the capture capacity is discussed. The transformation of PH 3 followed the sequence of PH 2 f H 2 P-OH f HP(OH) 2 f P(OH) 3 f HO-PdO f H 3 PO 4 . At the same time, the CuO/Cu(OH) 2 moieties in the TiO 2 lattice were reduced to Cu 0 . The H 2 P-OH and HO-PdO are the two stable intermediates, and they occupied the active species to inhibit further chemisorption. Direct oxidation of PH 3 or the intermediates with adsorbed O 2 was not efficient. However, the Cu/TiO 2 sample catalyzed their interactions via reduction and then oxidation of the Cu 2þ ions. Water vapor acts as a cocatalyst to facilitate the oxidation of the intermediates. The end product, H 3 PO 4 , migrated to bound the TiO 2 support and free the CuO/Cu(OH) 2 for the following catalytic processes. Although competitive adsorption of water molecules initially retarded the adsorption rate, the high extent of oxidation greatly promoted the capture capacity of the Cu/TiO 2 in humidified air.

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“…The main content of yellow phosphorus tail gas is about 85%$95% CO (1) which can be used as raw material gas to synthesize chemical products such as methylformiate, dimethylether, methyl carbonate, methanol, and so on. However, the reuse of yellow phosphorus tail gas is restricted wildely because the tail gas contains PH 3 (300$900 ppm) that is a potent catalyst poison in CO synthesizing chemistry even at a low concentration (2,3). Moreover, PH 3 is highly toxic by the inhalation route, which can result in respiratory, neurological, and gastrointestinal effects.…”

Section: Introductionmentioning

confidence: 99%

Effect of Preparation Conditions on the Property Cu/AC Adsorbents for Phosphine Adsorption

Ning

et al. 2012

Separation Science and Technology

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Copper-based activated carbon adsorbents (Cu/AC) were prepared and used to investigate the effects of various copper precursors, impregnation solution concentration, and calcination temperature on phosphine (PH 3 ) adsorption removal from yellow phosphorus tail gas. N 2 adsorption isotherm and X-ray Diffraction (XRD) were used for characterizing the Cu/AC adsorbents. It can be seen that the Cu(N)/AC adsorbent prepared from the Cu(NO 3 ) 2 precursor has higher PH 3 breakthrough adsorption capacity than other three adsorbent because the surface copper status of it is mainly CuO. Fresh activated carbon requires an optimal impregnation solution concentration (0.05 mol/L) to reach this optimal PH 3 breakthrough adsorption capacity (78.62 mg/g). The result shows that the surface chemical characteristics (Cu content) of activated carbon is more important than the physical ones (specific surface or pore volume) for the PH 3 adsorption performance. When the calcination temperature is 350 C, the Cu(N)/AC adsorbent has the biggest PH 3 breakthrough adsorbed amount of 112.38 mg/g. The present study confirmed that the Cu/AC adsorbents would be one of the candidates for PH 3 adsorption removal from yellow phosphorus tail gas.

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Adsorption of low concentration phosphine in yellow phosphorus off-gas by impregnated activated carbon

Cited by 54 publications

References 10 publications

Adsorption/desorption of low concentration of carbonyl sulfide by impregnated activated carbon under micro-oxygen conditions

Adsorption/desorption of low concentration of carbonyl sulfide by impregnated activated carbon under micro-oxygen conditions

Chemical Capture of Phosphine by a Sol−Gel-Derived Cu/TiO₂ Adsorbent − Interaction Mechanisms

Effect of Preparation Conditions on the Property Cu/AC Adsorbents for Phosphine Adsorption

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Adsorption of low concentration phosphine in yellow phosphorus off-gas by impregnated activated carbon

Cited by 54 publications

References 10 publications

Adsorption/desorption of low concentration of carbonyl sulfide by impregnated activated carbon under micro-oxygen conditions

Adsorption/desorption of low concentration of carbonyl sulfide by impregnated activated carbon under micro-oxygen conditions

Chemical Capture of Phosphine by a Sol−Gel-Derived Cu/TiO2 Adsorbent − Interaction Mechanisms

Effect of Preparation Conditions on the Property Cu/AC Adsorbents for Phosphine Adsorption

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Chemical Capture of Phosphine by a Sol−Gel-Derived Cu/TiO₂ Adsorbent − Interaction Mechanisms