Search Results

You are looking at 101 - 110 of 255 items for :

  • Refine by Access: All Content x
Clear All

sample (1.7% mass of Al 2 O 3 ), at 500 °C. Legends: filled square C 2 H 5 OH conversion, open triangle CH 3 CHO, filled inverted triangle C 2 H 4 , times H 2 , filled circle C 2 H 6 , open circle CH 4 , selectivities

Restricted access

), 1674 (s), carbonyl, 1613 (s), aromatic nucleus, 1528 (s), 1347 (s), nitro group; 1 H-NMR (δ, DMSO-d 6 ) 6.15 (d, J = 2.0 Hz, 1H), 6.18 (overlapping s and d, 2H), 6.87 (t, J = 7.8 Hz, 1H), 8.16 (A portion of an ABX pattern, J AB = 8.5 Hz, 1H), 8

Restricted access

for the selective reduction of NO by C 3 H 6 in excess oxygen even in the presence of 10% water [ 6 ]. These were prepared by coprecipitation method. Being basically refractory materials, the synthesis of aluminates usually involves solid

Restricted access

and CH 4 were separated on molecular sieve 13X column whereas CO 2 , C 2 H 6 and C 2 H 4 were separated on a Haysept column. The crystalline structure of the prepared samples was analyzed with a Rigaku Multiflex diffractometer provided with

Restricted access
Reaction Kinetics, Mechanisms and Catalysis
Authors:
Viorel Chihaia
,
Karl Sohlberg
,
B. Grzybowska-Świerkosz
,
M. Ruszel
,
R. Grabowski
,
L. Kępiński
,
M. A. Małecka
, and
J. Sobczak

occurring on the studied catalysts are: Catalytic activity data for oxidation of C 3 H 8 , C 3 H 6 and C 2 H 6 at 300 °C and of CO at 35 °C are shown in Figs. 2 and 3 . The activity is given in the form of an average rate of a reaction in the

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors:
D. Wyrzykowski
,
E. Hebanowska
,
G. Nowak-Wiczk
,
M. Makowski
, and
L. Chmurzyński

.5%), trans -aconitic acid, C 6 H 6 O 6 , (≥98%) and cis -aconitic acid, C 6 H 6 O 6 , (≥98%) were purchased from Aldrich Chemical Corp. and were used without further purification. Methods The TG-FTIR analyses in argon (Ar

Open access

] + ; 1 H-NMR (600 MHz, CDCl 3 ) δ : 7.48 (brs, 1 H), 7.34 (d, J = 8.79 Hz, 1 H), 7.32 (s, 2H), 6.85 (d, J = 2.05 Hz, 1 H), 6.78 (dd, J = 8.64, 2.20 Hz, 1 H), 5.06 (ddd, J = 11.64, 9.45, 4.98 Hz, 1H), 4.48 (br. s., 1H), 3.92 (s, 9 H), 3.91 (m, 1H

Open access

slowly to room temperature (298 K). The end product was washed with 20 cm 3 of ethanol (in two parts) and then stored in desiccators above CaCl 2 . For tin sodium inositol-hexaphosphate (Sample No. 3), 5.0 g of C 6 H 6 Na 12 O 24 P 6 [sodium

Restricted access

.5 6.89 17.2 ± 0.6 Proton transfer to Ni II (H −3 A 4 ) 2− shows one reaction for −log[H + ] > 6.6. Two consecutive reactions have been observed for 5.8 < −log[H

Restricted access

pressure. The gas mixture contained 5 vol% C 4 H 6 (Aldrich, 99+%), 5 vol% O 2 and 90 vol% He and was fed from a gas cylinder by a mass-flow controller. 100 mg of catalyst diluted with quartz sand of the same mesh size was placed in the reactor

Restricted access