The static microreactor technique a new, simple method for determination of kinetic parameters of gas-phase heterogeneous catalytic reactions

1977 ◽  
Vol 6 (4) ◽  
pp. 481-487 ◽  
Author(s):  
F. Notheisz ◽  
Á. G. Zsigmond ◽  
M. Bartók
Keyword(s):  
Kinetic Parameters ◽  
Gas Phase ◽  
Catalytic Reactions ◽  
Simple Method ◽  
Heterogeneous Catalytic

A simple method for the determination of adsorption kinetic parameters using circulating-type shallow bed reactor (CSBR)

2017 ◽  
Vol 92 ◽  
pp. 1-8
Author(s):  
Takashi Kawakita ◽  
Huan-Jung Fan ◽  
Yoshimi Seida ◽  
Tomohiro Kinoshita ◽  
Eiji Furuya
Keyword(s):  
Kinetic Parameters ◽  
Adsorption Kinetic ◽  
Simple Method

The Spectrophotometric Determination of Formaldehyde in Whole Smoke/Eine spektralphotometrische Methode zur Bestimmung von Formaldehyd im Vollrauch von Cigaretten

1971 ◽  
Vol 6 (1) ◽  
Author(s):  
H.P. Stauffer ◽  
J. Bourquin
Keyword(s):  
Gas Phase ◽  
Cigarette Smoke ◽  
Carbonyl Compounds ◽  
Ammonium Ion ◽  
Buffer Solution ◽  
Simple Method ◽  
Different Types ◽  
Volatile Aldehydes ◽  
Whole Smoke

AbstractThe quantitative determination of formaldehyde in the gas phase of cigarette smoke does not permit any conclusion about the actual level in whole smoke. This is due to the fact that a Cambridge filter charged with smoke condensate absorbs up to 50 % of the volatile aldehydes from the gas phase. A simple method is presented making possible the estimation of formaldehyde in whole cigarette smoke. The procedure is based on the Hantzsch reaction between formaldehyde, acetylacetone and ammonium ion in an aqueous buffer solution. The reaction product, 3,5-diacetyl1,4-dihydrolutidine, has an absorption maximum at 412 nm and is measured spectrophotometrically. The operations are simple and there are no separation steps required. Reproducibility is excellent and interference by other carbonyl compounds can be neglected. Acetaldehyde in concentrations 10 times higher than formaldehyde interferes to less than 1 %. Different types of cigarettes have been analysed with respect to their delivery of formaldehyde. Values found range from 40 to 90 µg per cigarette. The concentrations found in whole smoke are significantly higher than the values cited in the Iiterature for gas phase formaldehyde

Simultaneous Analysis of Gas Phase and Intermediates in the Hydrogenation of Carbon Oxides by DRIFTS

1993 ◽  
Vol 47 (11) ◽  
pp. 1760-1766 ◽  
Author(s):  
J. J. Benitez ◽  
I. Carrizosa ◽  
J. A. Odriozola
Keyword(s):  
Kinetic Parameters ◽  
Gas Phase ◽  
Catalytic Hydrogenation ◽  
Special Interest ◽  
Diffuse Reflectance ◽  
Catalytic Decomposition ◽  
Environmental Cell ◽  
Correct Determination ◽  
Diffuse Reflectance Infrared

In this work the experimental details and some examples of applications of diffuse reflectance infrared technique are described. Special interest has been devoted to a correct determination of the temperature of the sample, to gas-phase analysis, and to quantitative aspects in a DRIFTS controlled environmental cell. Applications to the analysis of the gas phase during catalytic hydrogenation and to the obtainment of kinetic parameters for the catalytic decomposition of adsorbates are included.

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