Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 32,
  • Issue 5,
  • pp. 496-499
  • (1978)

Infrared Spectra of Some Nonreduced Methanation Catalysts

Not Accessible

Your library or personal account may give you access

Abstract

The infrared spectra (4000 to 400 cm<sup>−1</sup>) of two commercial nonreduced methanation catalysts have been recorded and interpreted. The catalysts are prepared as mixtures of (a) nickel in a silica support and (b) nickel in an alumina support. Graphite is added to these mixtures as a binder to facilitate pressing of catalyst pellets for commercial use. It is revealed in the spectra of the catalysts that although (a) is prepared to have a simple NiO/SiO<sub>2</sub> composition the silica support is not of the form SiO<sub>2</sub>; rather the spectral characteristics are similar to those found for linear chain silicates. In (b) the Al—O vibrations are characteristic of amorphous Al<sub>2</sub>O<sub>3</sub>, and H<sub>2</sub>O is tightly bound in the pellet. The CO<sub>3</sub><sup>=</sup> ion is present in both (a) and (b). It is not bound to Ni in either (a) or (b), but it is bound in the silicate structure of (a) and associated with Al in (b). The presence of the ion cannot be explained by only <i>in situ</i> generation from atmospheric CO<sub>2</sub> and H<sub>2</sub>O, but its presence must be due to residual CO<sub>3</sub><sup>=</sup> from the catalyst preparation.

PDF Article
More Like This
Infrared emission spectra from a heterogeneous catalyst system in reaction conditions. 1: Description of the microreactor assembly

P. C. M. van Woerkom, P. Blok, H. J. van Veenendaal, and R. L. de Groot
Appl. Opt. 19(15) 2546-2550 (1980)

Some Infrared Interference Spectra

Joseph W. Ellis
J. Opt. Soc. Am. 23(3) 88-91 (1933)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved