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The reactive ball milling (RBM) process was carried out at room temperature, using a high energy ball mill (Planetary Mono Mill PULVERISETTE 6, Fritsch, Germany). After 6 h of RBM time, the powders were discharged from the vial inside the glove box and sealed in Pyrex vails.
The milling energy generated by this type of mill is relatively modest by comparison with the magnetomill UniBall Mill 5 used for inducing a profound mechanical dehydrogenation reported in [3,4,6,7,8,9,10,11,12]. In addition, the milling time up to 5 h used in the present work might have been too short to provide a sufficient milling energy ...
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Solventfree dehydrogenation of γterpinene in a ball mill ... The present article reports on the solventfree dehydrogenation of γterpinene (1) in a planetary ball mill affording pcymene (2) as the predominant reaction... دریافت قیمت
The present article reports on the solventfree dehydrogenation of γterpinene (1) in a planetary ball mill affording pcymene (2) as the predominant reaction product. The influence of various reaction parameters and technical variables on the transformation of 1 .
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Sintering of Al2O3TiO2 Mixtures Obtained by HighEnergy Ball, In this work, the preparation of Al2O3TiO2 ceramics by highenergy ball milling varying the molar fraction in 1:1 and 3:1 was investigated The powder mixtures were processed in a planetary mill at 250rpm and a balltopowder weight ratio of. Contact Supplier
1 Electronic Supporting Information Solventfree Dehydrogenation of γTerpinene in a Ball Mill: Investigation of reaction Parameters Tony Szuppa,a Achim Stolle,*a Bernd Ondruschkaa and Wieland Hopfeb a Institute for Technical Chemistry and Environmental Chemistry, FriedrichSchiller University Jena, Lessingstraße 12, D07743 Jena, Germany
Feb 11, 2019· Reactive ball milling was then carried out at room temperature using a the PM400 high energy ball mill. After 6,, 25, 50, 100 and 200 hours of reactive ball milling, the reaction was halted and a small amount (50 mg) of MgH 2 powder was then extracted in the glove box and sealed in vials. The asreacted ballmilled powders obtained after ...
Speedup your synthesis lab: Planetary Ball Mills as a tool in organic synthesis . ... dehydrogenation of γterpinene to cymene [p 10] and the oxidative cleavage of βpinene affording nopinone [11]. Especially the last example proved to be a real alternative for
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Effect of ballmilling duration and dehydrogenation on the morphology, microstructure and catalyst dispersion in Nicatalyzed MgH 2 hydrogen storage materials Stephen D. House,a,⇑,1 John J. Vajo,b Chai Ren,c Angus A. Rocketta and Ian M. Robertsona,d
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May 22, 2007· Tony Szuppa, Achim Stolle, Bernd Ondruschka and Wieland Hopfe, Solventfree dehydrogenation of γterpinene in a ball mill: investigation of reaction parameters, Green Chemistry, /c002819c, 12, 7, (1288), (2010).
The present article reports on the solventfree dehydrogenation of γterpinene (1) in a planetary ball mill affording pcymene (2) as the predominant reaction product.
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Sep 15, 2015· The dehydrogenation processes of MgH 2 doped with 3 mol% ferrites additives (ZnFe 2 O 4, MnFe 2 O 4 and Mn Zn Fe 2 O 4) initiate at about 300 °C, 340 °C and 310 °C, respectively. For the 5 mol% ferrites doped samples, the dehydrogenation processes proceed at 230 °C, 300 °C and 280 °C, respectively.
Fig. 10 presents the variation of Ti valence states in prepared Ti 3 C 2 and LiAlH 4 +20 wt% Ti 3 C 2 before and after dehydrogenation. For Ti 3 C 2 before ball milling with LiAlH 4, the highresolution XPS spectrum of Ti 2p can be deconvoluted into four peak components, which are assigned to Ti–C and Ti 2+ species, as seen in Fig. 10(a).
This is sufficient to prove that MgH2 can react with dehydrogenation of the sample is carried out. Fig. 9 exhibits the CoFe2O4 at about 189 C. first dehydrogenation and the second dehydrogenation curves of Following the first complete dehydrogenation, the samples the ballmilled MgH2 doped with 7 mol% nanosized CoFe2O4 and were subjected to ...
Highdensity fuel candidates have been synthesized in up to 90% yield from βpinene, a renewable strained bicyclic compound derived from wood and plant sources. The process is based on the heterogeneous acidic catalysts MontmorilloniteK10 and Nafion, which promote selective isomerization and dimerization of pinenes under moderate conditions (100 °C and atmospheric pressure).
Apr 07, 2015· a milling material: agate, 20 min, 800rpm ≙ Hz. b 20 min at 20 °C with maximal power input. c 60 in at 80 °C. d 30 min at 80 °C, maximal power input = 300 W.. The effective transfer of energy from the power socket into a product of interest has been proven for a number of examples. When different ball mills are compared with respect to their gross power input and the degree of ...
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