ISSN:
1572-879X
Keywords:
carbon measurements
;
coke
;
FTIR
;
TGA
;
sulfated zirconia
;
isomerization
;
n‐butane
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract A useful, high‐sensitivity method for quantifying small amounts of coke on a catalyst was developed. A TGA/FTIR technique was used. Gases evolved from the sample during the thermogravimetric analysis were transferred from the furnace by a purge gas to the flow cell of an FTIR. The intensity of the infrared spectra of evolved gases, such as CO2, was measured as a function of time and displayed as a chromatogram. Integration of the chromatograms was compared to that of a standard sample and gave the amount of coke deposited on the catalyst. The carbon deposition on sulfated sol–gel zirconia in the isomerization of n‐butane at 200°C was measured. The carbon content was 0.013 wt% following deactivation for 15 min and 0.06 wt% after 180 min.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1019055200591
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