Dehydrogenation of propane over natural clinoptilolite zeolites

Katranas, T.; Vlessidis, Athanasios G.; Tsiatouras, V.A.; Triantafyllidis, Konstantinos S.; Evmiridis, Nicholaos P.

doi:10.1016/s1387-1811(03)00367-6

Cited by 37 publications

(19 citation statements)

References 44 publications

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“…The major mineral phase present in the studied samples is found to be HEU-type zeolite, with percentages varying from 42 wt.% (sample X1) to 67 wt.% (sample X4), with an average amount of 57 wt.%. These results are in good agreement with previous studies on the zeolitic tuffs of Metaxades Area, which report an average amount of 58 wt.% in HEU-type zeolite (Marantos et al, 1989;Tsirambides et al, 1989Tsirambides et al, , 1993Tsirambides, 1991;Misaelides et al, 1994aMisaelides et al, ,b, 1995aKoutles et al, 1995;Symeopoulos et al, 1996;Haidouti, 1997;Tserveni-Gousi et al, 1997;Sikalidis, 1998;Yannakopoulos et al, 1998;Vlessidis et al, 2001;Filippidis and Kassoli-Fournaraki, 2002;Katranas et al, 2003;Papadopoulos et al, 2004;Filippidis and Kantiranis, 2005;Kantiranis et al, 2006;Filippidis et al, 2007). In minor amounts plagioclase (5-21 wt.%), K-feldspar (4-19 wt.%), cristobalite (3-17 wt.%), quartz (3-8 wt.%), micas (3-4 wt.%) and clay minerals (4-11 wt.%), were also determined.…”

Section: Resultssupporting

confidence: 92%

Uptake Ability of Zeolitic Rock From South Xerovouni, Avdella, Evros, Hellas

Tzamos¹,

Filippidis²,

Kantiranis³

et al. 2017

geosociety

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Section: Resultssupporting

confidence: 92%

Uptake Ability of Zeolitic Rock From South Xerovouni, Avdella, Evros, Hellas

Tzamos¹,

Filippidis²,

Kantiranis³

et al. 2017

geosociety

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“…Among them, Fe-mordenite and Fe-clinoptilolite have shown catalytic properties for the SCR of NO with ammonia, similar to that of Fe-ZSM-5 [172]. Natural zeolites [173] have also been used because they have a good combination of their crystalline structures and exhibit interesting physicochemical properties with various metal oxy-hydroxide phases that are naturally embedded inside their pores [174]. However, potential commercialization of natural zeolites as catalysts is not feasible due to the cost of homogenisation and purification of the zeolite-bearing tuffs [175].…”

Section: Selective Catalytic Reduction (Scr) Of No By H 2 or Nh 3 Or mentioning

confidence: 99%

Catalysis for NOx abatement

2009

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“…Natural zeolites are widely applied in the construction and building materials industry, water and wastewater treatment, environmental remediation as well as agriculture, consumer products and medical applications. Clinoptilolite is the main zeolite used for commercial applications, while chabazite and mordenite are used in smaller quantities [11]. Zeolitic tuffs are used as additives in cement and concrete to neutralize excess lime, but can also be thermally expanded to form light weighed insulation materials [12].…”

Section: Introductionmentioning

confidence: 99%

Characterization and Utilization of Natural Zeolites in Technical Applications

Stocker

Ellersdorfer

Lehner

et al. 2017

Berg Huettenmaenn Monatsh

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Zeolites and zeolite rocks are commonly used in different industrial applications. Natural zeolites present an attractive material for environmental applications because of their high abundance, availability and low costs. Depending on geological settings and conditions during mineral formation, natural zeolite deposits usually represent a heterogeneous mixture of zeolite minerals together with varying amounts of gangue minerals (e. g. quartz, feldspars and phyllosilicates). Hence, profound mineralogical knowledge and a detailed characterization of natural zeolites are essential for tapping their full potential in any practical application. However, this is rarely done as detailed mineralogical characterizations are elaborate and often neglected in favour of bulk chemical analyses (e. g. XRF). In this paper we describe typical technical applications for natural zeolites as well as the requirements demanded for their use. An analytical protocol has been developed for the detailed characterization of natural zeolites for ammonium exchange consisting of a combination of mineralogical and chemical methods and is exemplarily demonstrated. The methodology comprises mineralogical investigations with X-ray diffraction (XRD) and electron microprobe analyses (EPMA) to provide qualitative data on mineral compositions and in-situ analysis of mineral chemistry (Si/Al-ratio, cation contents). The examinations are accompanied by bulk chemical analysis (XRF) as well as thermoanalytical investigations (TG/DSC) to distinguish between certain zeolite minerals. Finally, ion exchange experiments for ammonium have been carried out to determine the cation exchange capacity (CEC) of zeolite samples for a defined range of concentrations.The aim of the study is to develop an analytical routine in order to enable the detailed characterization of natural zeolite samples with standardized means of mineralogi-

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Dehydrogenation of propane over natural clinoptilolite zeolites

Cited by 37 publications

References 44 publications

Uptake Ability of Zeolitic Rock From South Xerovouni, Avdella, Evros, Hellas

Uptake Ability of Zeolitic Rock From South Xerovouni, Avdella, Evros, Hellas

Catalysis for NOx abatement

Characterization and Utilization of Natural Zeolites in Technical Applications

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