The heterogeneous interaction of trace gases on mineral dust and soot
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The reaction of 4-methoxy-1,2,3,4-tetrahydroisoquinolines I (R = MeO, R1 = H; RR1 = OCH2O) with Li diisopropylamide affords dimerization products II. The intermediacy of orthoquinodimethanes and diradicals is assumed. [on SciFinder (R)] ...
The aim of this study is to identify the reaction mechanism of methanol dehydrogenation on sodium carbonate catalyst. Quantitative analyses of the products of methanol dehydrogenation on sodium carbonate catalyst at 963 K indicate that methane is formed in ...
Various catalysts were used in a systematical study of selective catechol methylation to 3-methylcatechol (I) in a fixed-bed reactor of 35-mm diam. and 16-cm length. Reaction products were analyzed by gas chromatog. with mass spectrometric detection. Alumi ...
Co-impregnation of vanadia and tungsta on titania produced highly active catalysts for the reduction of nitrogen oxides with ammonia but showed aging tendencies at temperatures around 600 °C. In order to preserve their low temperature activity after hydrot ...
NOx is removed from gas by redn. with at. N in a plasma jet at 50-1000 M and 5000-6000 K. The NOx-contg. gas is injected into the plasma jet at 30 m/s resulting in the reaction NO + N = N2 + O. A high redn. degree of NOx is attained with no salt wastes. Th ...
In heterogeneous catalytic reactions, the rate of adsorption often falls extremely rapidly with increasing coverage. The reason can be a strong inhibition by a reactant or an increasing activation energy with coverage. Adsorption/desorption models based on ...
Kinetic measurements have been made on the gas-phase reaction N2O4 + M .dblharw. 2NO2 + M by applying the temp.-jump relaxation method. Equil. mixts. contg. NO2, N2O4, a small quantity of an IR absorber, and an excess of a third-body bath gas, have been su ...
We investigated the adsorption properties of methanol and ethanol on Si(111)2 x 1 as a function of temperature in the range 80-300 K by means of synchrotron radiation photoemission of core and valence levels. A physisorbed state is characterized at 80 K, w ...
An exptl. set-up for the simultaneous detn. of reactant concn. in the gas phase and on the surface by spectroscopic methods was proposed to obtain information on the intrinsic kinetics of unsteady-state processes undergoing heterogeneous catalysis. The hyd ...
RSO2F (R = alkyl, cycloalkyl) were prepd. by the reaction of RSH or R2S2 with NO2 or N2O4 and HF. Thus, n-C8H17SH was emulsified with 83.3% HF, followed by the addn. of NO2 at 25 Deg to give 87% C8H17SO2F. [on SciFinder (R)] ...
