Borided metal catalysts in methanation of carbon monoxide--1. Initial activity and conversion-temperature behavior of unsupported catalysts

Journal Article · Wed Oct 01 00:00:00 EDT 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90317-6· OSTI ID:6167536

Uken, A H; Bartholomew, C H

The borided catalysts were prepared by reduction of nickel, cobalt, nickel/cobalt, nickel/ruthenium, or nickel/rhodium salts in ethanol with sodium borohydride, followed by hydrogen-reduction at 675/sup 0/-725/sup 0/K. The catalysts were characterized by BET and hydrogen adsorption surface area measurements, X-ray diffraction, ESCA and optical emission spectroscopy, wet chemical analyses, and activity and selectivity tests for methanation. A comparison of the activity and selectivity data for the borided catalysts with those of Raney nickel and pure nickel showed that the borided nickel and noble-metal promoted nickel catalysts were nearly as active as Raney nickel based on mass or volume, but that, e.g., the borided cobalt had turnover numbers for CO conversion and methane formation that were one order of magnitude higher than those of pure nickel and slightly higher than those of Raney nickel. Catalysts reduced with borohydride in water instead of ethanol had a lower dispersion and higher selectivity for C/sub 2/+ hydrocarbons, e.g., the borided nickel gave C/sub 2/+ hydrocarbons with 75% selectivity at 26% CO conversion, and up to 91% selectivity was obtained at lower conversions. Up to 98% methane selectivity was observed on the noble-metal promoted catalysts.

• Research Organization: Brigham Young Univ.
• OSTI ID: 6167536
• Journal Information: J. Catal.; (United States), Vol. 65:2
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
ELECTRON SPECTROSCOPY
EMISSION SPECTROSCOPY
EXPERIMENT
BORIDES
BORON COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT COMPOUNDS
COHERENT SCATTERING
DATA
DIFFRACTION
ELEMENTS
INFORMATION
KINETICS
METALS
NICKEL COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SCATTERING
SPECTROSCOPY
SURFACE PROPERTIES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)