Catalytic decomposition of ammonium perchlorate on hollow mesoporous CuO microspheres

Hu, Yinghui; Yang, Shimin; Tao, Bowen; Liu, Xiaolong; Lin, Kaifeng; Yang, Yang; Xia, Debin; Hao, Dongyu

doi:10.1016/j.vacuum.2018.10.020

Cited by 72 publications

(32 citation statements)

References 47 publications

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“…XPS data acquisition and data curve fitting were employed to identify the copper valences in the Cu(0.05)/NAC catalyst before and after reaction testing (Figure ). The main Cu 2p peaks before reaction testing were broad and located at 933.8 eV (Cu 2p 3/2 ) and 953.9 eV (Cu 2p 1/2 ); these positions and the spectral shapes signify Cu 2+ (CuO) . The fresh catalyst also had peaks at 942.2 and 962.2 eV that are known as satellite peaks.…”

Section: Resultsmentioning

confidence: 99%

Deactivation mechanism of activated carbon supported copper oxide SCR catalysts in C₂H₄ reductant

et al. 2019

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Current state‐of‐the‐art NH3‐SCR technology based on vanadium catalysts suffers problems associated with NH3 slip and poisoning of the catalyst and blockage of heat recovery steam generators (HRSG). If environmentally‐friendly catalysts capable of efficient operation at lower temperatures could be developed that used a reductant other than NH3, the issues with current state‐of‐the‐art SCR could be significantly lessened. Hence, in this study, activated carbon (AC) supported copper oxide‐based catalysts for SCR while using C2H4 as a reductant was discussed. Reaction testing of catalysts demonstrated high initial NO conversion with steeply declining activity over 2 h of testing when C2H4 was used as the reductant; in comparison, with the same catalyst and NH3 as the reductant, stable, long‐term NO conversion was achieved, but at a lower rate than the initial reactivity with C2H4. As a consequence, catalyst characterization studies were performed to assess deactivation mechanisms when C2H4 was the reductant. These studies included x‐ray diffraction, BET surface area and porosity, temperature programmed reduction, scanning electron microscopy, Raman spectroscopy and x‐ray photoelectron spectroscopy of both fresh and deactivated catalysts. The analytical results showed the surface area and porosity of the catalyst remained unchanged and the initially highly‐dispersed Cu species became agglomerated and more crystalline during reaction testing. Furthermore, carbon black was also detected on the catalyst surface after testing, presumably formed during the decomposition of C2H4. Both agglomeration of the active Cu species and blockage by carbon deposits would decrease the availability of active sites and lead to decreased catalytic activity.

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Section: Resultsmentioning

confidence: 99%

Deactivation mechanism of activated carbon supported copper oxide SCR catalysts in C₂H₄ reductant

et al. 2019

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“…In the literature, it is possible to nd different copper-based catalysts with better performance than the rGO|CuNP system. Hu 65 and coworkers reduced the HTD by 106 C by the introduction of hollow mesoporous CuO, while nanohybrids of rGO/CuFe 2 O 4 (ref. 66) and a new copper metal-organic framework (Cu-MOF) 67 achieved similar results, reducing this value by 96 C.…”

Section: Application As Propellant Catalystsmentioning

confidence: 99%

Novel in situ synthesis of copper nanoparticles supported on reduced graphene oxide and its application as a new catalyst for the decomposition of composite solid propellants

Ríos

Povea²,

Cerda-Cavieres

et al. 2019

RSC Adv.

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“…[ 28 ] Recently, it was demonstrated that the catalytic efficiency of the thermal decomposition AP has been significantly improved by the addition of CuO hollow microspheres rather than CuO microparticles and CuO nanoparticles. [ 29 ] Xu et al have reported that the addition of 2 wt.‐% of mesoporous graphitic carbon nitride‐CuO nanocomposites decreased the thermal decomposition of AP by 118.5 °C. [ 16 ] In another work, a green synthesis of CuO NPs using Calotropis gigantea plant has been performed and their catalytic effect on the thermal decomposition of AP has been assessed as well.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Effect of Green CuO Nanoparticles on the Thermal Decomposition Kinetics of Ammonium Perchlorate

Benhammada

Trache

Chelouche

et al. 2020

Zeitschrift anorg allge chemie

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In the present work, a green synthesis of copper oxide nanoparticles (CuO NPs) has been performed through a precipitation method using three different copper precursors and sylvestrys leaf extract as a capping agent. Morphology and structure of the obtained CuO NPs were confirmed by X‐ray diffraction (XRD), ultraviolet‐visible (UV/Vis), Fourier transform infrared (FT‐IR) and Raman spectroscopy, as well as scanning electron microscopy (SEM). Moreover, their thermal behavior and catalytic performance were studied using thermogravimetry (TG) and differential scanning calorimetry (DSC). Four isoconversional kinetic methods have been applied to the DSC data obtained at different heating rates in order to determine the kinetic triplets. The results showed that the introduction of CuO NPs has noticeably lowered the thermal decomposition temperature by 91.7, 89.9, and 83.0 °C, and increased the exothermic enthalpy by 1053, 832, and 962 J·g–1 for AP‐CuO‐S, AP‐CuO‐N, and AP‐CuO‐Cl, respectively. Furthermore, CuO NPs were found to reduce the activation energy of AP decomposition. Besides that, ammonium perchlorate decomposes following different reaction models g(α), depending on the decomposition stage and the addition of CuO NPs. These results indicate further that the green synthesized CuO nanoparticles are promising ballistic modifiers for composite solid propellants.

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Catalytic decomposition of ammonium perchlorate on hollow mesoporous CuO microspheres

Cited by 72 publications

References 47 publications

Deactivation mechanism of activated carbon supported copper oxide SCR catalysts in C₂H₄ reductant

Deactivation mechanism of activated carbon supported copper oxide SCR catalysts in C₂H₄ reductant

Novel in situ synthesis of copper nanoparticles supported on reduced graphene oxide and its application as a new catalyst for the decomposition of composite solid propellants

Catalytic Effect of Green CuO Nanoparticles on the Thermal Decomposition Kinetics of Ammonium Perchlorate

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Catalytic decomposition of ammonium perchlorate on hollow mesoporous CuO microspheres

Cited by 72 publications

References 47 publications

Deactivation mechanism of activated carbon supported copper oxide SCR catalysts in C2H4 reductant

Deactivation mechanism of activated carbon supported copper oxide SCR catalysts in C2H4 reductant

Novel in situ synthesis of copper nanoparticles supported on reduced graphene oxide and its application as a new catalyst for the decomposition of composite solid propellants

Catalytic Effect of Green CuO Nanoparticles on the Thermal Decomposition Kinetics of Ammonium Perchlorate

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Deactivation mechanism of activated carbon supported copper oxide SCR catalysts in C₂H₄ reductant

Deactivation mechanism of activated carbon supported copper oxide SCR catalysts in C₂H₄ reductant