2013
DOI: 10.1021/ie303487q
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Research on Isobutane Dehydrogenation over Mo/MgAl2O4Catalysts and Pilot-Scale Evaluation in a Circulating Fluidized-Bed Unit

Abstract: In this article, an environmentally friendly non-noble-metal class of Mo/MgAl 2 O 4 catalysts is demonstrated to exhibit excellent performance in isobutane dehydrogenation. Results of activity tests indicated that an induction period is required for the catalysts to develop the active species. Further investigation revealed that high-valence-state Mo species are favorable for the initial oxidative reactions and Mo 4+ ions are probably the actual active species for catalytic dehydrogenation. Given the strongly … Show more

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Cited by 18 publications
(10 citation statements)
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“…Te mperature-programmed reduction of hydrogen (H 2 -TPR) was carried out to investigate the redox behavior of the catalyst samples, and detailed operation procedures have been provided in our previously published work. [61] The morphology of the materials was characterized by using aJ EM 2010 high-resolution transmission electron microscope (TEM) operated at 120.0 kV.E nergy-dispersive X-ray spectroscopy (EDX) analysis was performed at an acceleration voltage of 120.0 kV by using aJ EM 2010 TEM equipped with an Oxford Instrument energy-dispersive spectrometer.X -ray photoelectron spectra (XPS) were recorded by using aT hermo Fisher K-Alpha apparatus with an AlK a X-ray excitation source. The data processing involved background subtraction by using the Shirley method, spectrum deconvolution by using aG aussian-Lorentzian mixed lineshape function, and peak-area determination by integration.…”
Section: Catalyst Characterizationmentioning
confidence: 99%
“…Te mperature-programmed reduction of hydrogen (H 2 -TPR) was carried out to investigate the redox behavior of the catalyst samples, and detailed operation procedures have been provided in our previously published work. [61] The morphology of the materials was characterized by using aJ EM 2010 high-resolution transmission electron microscope (TEM) operated at 120.0 kV.E nergy-dispersive X-ray spectroscopy (EDX) analysis was performed at an acceleration voltage of 120.0 kV by using aJ EM 2010 TEM equipped with an Oxford Instrument energy-dispersive spectrometer.X -ray photoelectron spectra (XPS) were recorded by using aT hermo Fisher K-Alpha apparatus with an AlK a X-ray excitation source. The data processing involved background subtraction by using the Shirley method, spectrum deconvolution by using aG aussian-Lorentzian mixed lineshape function, and peak-area determination by integration.…”
Section: Catalyst Characterizationmentioning
confidence: 99%
“…Moreover, the H 2 -TPR experiment was performed to investigate the redox behavior of the samples, and detailed operational methods have been provided in our published work. [24] Metal dispersion and particle size were measured through H 2 pulse chemisorption with a FINESORB-3010 chemisorption analyzer (Finetec Instruments, China). The catalyst ( % 0.3 g) was reduced in situ under a flow of 10 vol % H 2 /N 2 (flow rate: 30 mL min À1 ) at 773 K for 1 h and then cooled to 100 8C in argon atmosphere.…”
Section: Catalyst Characterizationmentioning
confidence: 99%
“…Therefore, the development of a cost-effective and environmentally friendly catalyst system demonstrating an excellent dehydrogenation performance in the absence of oxidants is important. [24] Because CÀH bond activation is regarded as the rate-determining step in alkane dehydrogenation, [25,26] the mechanism of CÀH bond activation of the alkane and the interaction of the catalyst should be determined primarily. However, owing to the complexity of heterogeneous catalytic reactions, the activation of alkanes with transition-metal ions in the gas phase has been investigated.…”
Section: Introductionmentioning
confidence: 99%
“…13,14 Therefore, the major challenge in dehydrogenation technology is to develop a new type of catalyst with environmentally friendly and cost-effective characteristics as well as excellent performance in the absence of oxidants. 15 To achieve this goal, many attempts have been made. However, when Co and Ni were evaluated as active components, a great amount of methane was generated.…”
mentioning
confidence: 99%