Abstract

The authors investigate the possibility that the changes in relative CO and hydrogen adsorption strengths induced by titania result in a significant shift of the respective CO and H-adatom surface concentrations under steady-state methanation conditions between a clean Ni and a titania-containing surface. Using kinetic parameters for adsorption and desorption obtained from UHV experiments, mathematical models were developed which allowed calculation of the steady-state H and CO surface concentrations at reaction temperatures and moderate pressures (. 01-1 atm) under non-reactive and reactive conditions. It is found that changes in CO and hydrogen adsorption strengths caused by titania adspecies of nickel lead to significantly greater H-adatom coverages on Ni sites (uncovered by carbidic or graphitic carbon) under steady-state methanation conditions. This could be responsible for the higher methanation reaction rates typically observed for nickel supported on titania relative to nickel on silica or alumina.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society, Division of Petroleum Chemistry, Preprints
PublisherACS
Pages137-142
Number of pages6
Volume30
Edition1
StatePublished - Feb 1985

Fingerprint

Methanation
Titanium
Nickel
Adatoms
Adsorption
Hydrogen
Kinetic parameters
Reaction rates
Desorption
Alumina
Silica
Mathematical models
Carbon
Experiments
Temperature

ASJC Scopus subject areas

  • Fuel Technology

Cite this

Raupp, G., & Dumesic, J. A. (1985). EFFECTS OF TITANIA SURFACE SPECIES ON NICKEL: COADSORPTION OF CO AND H//2. In American Chemical Society, Division of Petroleum Chemistry, Preprints (1 ed., Vol. 30, pp. 137-142). ACS.

EFFECTS OF TITANIA SURFACE SPECIES ON NICKEL : COADSORPTION OF CO AND H//2. / Raupp, Gregory; Dumesic, J. A.

American Chemical Society, Division of Petroleum Chemistry, Preprints. Vol. 30 1. ed. ACS, 1985. p. 137-142.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Raupp, G & Dumesic, JA 1985, EFFECTS OF TITANIA SURFACE SPECIES ON NICKEL: COADSORPTION OF CO AND H//2. in American Chemical Society, Division of Petroleum Chemistry, Preprints. 1 edn, vol. 30, ACS, pp. 137-142.
Raupp G, Dumesic JA. EFFECTS OF TITANIA SURFACE SPECIES ON NICKEL: COADSORPTION OF CO AND H//2. In American Chemical Society, Division of Petroleum Chemistry, Preprints. 1 ed. Vol. 30. ACS. 1985. p. 137-142
Raupp, Gregory ; Dumesic, J. A. / EFFECTS OF TITANIA SURFACE SPECIES ON NICKEL : COADSORPTION OF CO AND H//2. American Chemical Society, Division of Petroleum Chemistry, Preprints. Vol. 30 1. ed. ACS, 1985. pp. 137-142
@inproceedings{b81299fa832d448f87bea3bf16e8406e,
title = "EFFECTS OF TITANIA SURFACE SPECIES ON NICKEL: COADSORPTION OF CO AND H//2.",
abstract = "The authors investigate the possibility that the changes in relative CO and hydrogen adsorption strengths induced by titania result in a significant shift of the respective CO and H-adatom surface concentrations under steady-state methanation conditions between a clean Ni and a titania-containing surface. Using kinetic parameters for adsorption and desorption obtained from UHV experiments, mathematical models were developed which allowed calculation of the steady-state H and CO surface concentrations at reaction temperatures and moderate pressures (. 01-1 atm) under non-reactive and reactive conditions. It is found that changes in CO and hydrogen adsorption strengths caused by titania adspecies of nickel lead to significantly greater H-adatom coverages on Ni sites (uncovered by carbidic or graphitic carbon) under steady-state methanation conditions. This could be responsible for the higher methanation reaction rates typically observed for nickel supported on titania relative to nickel on silica or alumina.",
author = "Gregory Raupp and Dumesic, {J. A.}",
year = "1985",
month = "2",
language = "English (US)",
volume = "30",
pages = "137--142",
booktitle = "American Chemical Society, Division of Petroleum Chemistry, Preprints",
publisher = "ACS",
edition = "1",

}

TY - GEN

T1 - EFFECTS OF TITANIA SURFACE SPECIES ON NICKEL

T2 - COADSORPTION OF CO AND H//2.

AU - Raupp, Gregory

AU - Dumesic, J. A.

PY - 1985/2

Y1 - 1985/2

N2 - The authors investigate the possibility that the changes in relative CO and hydrogen adsorption strengths induced by titania result in a significant shift of the respective CO and H-adatom surface concentrations under steady-state methanation conditions between a clean Ni and a titania-containing surface. Using kinetic parameters for adsorption and desorption obtained from UHV experiments, mathematical models were developed which allowed calculation of the steady-state H and CO surface concentrations at reaction temperatures and moderate pressures (. 01-1 atm) under non-reactive and reactive conditions. It is found that changes in CO and hydrogen adsorption strengths caused by titania adspecies of nickel lead to significantly greater H-adatom coverages on Ni sites (uncovered by carbidic or graphitic carbon) under steady-state methanation conditions. This could be responsible for the higher methanation reaction rates typically observed for nickel supported on titania relative to nickel on silica or alumina.

AB - The authors investigate the possibility that the changes in relative CO and hydrogen adsorption strengths induced by titania result in a significant shift of the respective CO and H-adatom surface concentrations under steady-state methanation conditions between a clean Ni and a titania-containing surface. Using kinetic parameters for adsorption and desorption obtained from UHV experiments, mathematical models were developed which allowed calculation of the steady-state H and CO surface concentrations at reaction temperatures and moderate pressures (. 01-1 atm) under non-reactive and reactive conditions. It is found that changes in CO and hydrogen adsorption strengths caused by titania adspecies of nickel lead to significantly greater H-adatom coverages on Ni sites (uncovered by carbidic or graphitic carbon) under steady-state methanation conditions. This could be responsible for the higher methanation reaction rates typically observed for nickel supported on titania relative to nickel on silica or alumina.

UR - http://www.scopus.com/inward/record.url?scp=0022016194&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0022016194&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0022016194

VL - 30

SP - 137

EP - 142

BT - American Chemical Society, Division of Petroleum Chemistry, Preprints

PB - ACS

ER -