Studies of mechanisms and kinetics of methane and ethane steam reforming on nickel catalysts

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7025481

Hsieh, H Y

Methane and ethane adsorption/desorption and reaction on steam-reforming catalysts, Ni(INCO), Ni/ZrO{sub 2}, and Ni/CaAl{sub 2}O{sub 4}, were studied by temperature-programmed desorption (TPD), temperature-programmed surface reaction (TPSR), and thermogravimetric (TGA) techniques. The data show that only a fraction of the methane adsorbed (determined by TPSR with H{sub 2}) on nickel catalysts is desorbed during TPD experiments. The results of TPD indicate supports and promoters affect the adsorption of methane and ethane, and transformation of adsorbed carbon species. Several carbon types formed during methane and ethane adsorptions including {alpha}, {beta}, {gamma}, vermicular (v), and graphitic (c) carbon can be identified by TPSR. These data indicate that the distribution of these carbon forms is also strongly a function of adsorption temperature and catalyst. The results show that there are significant quantities of CH{sub 4}, CO, and CO{sub 2} desorbed during TPSR reaction of H{sub 2}O with preadsorbed CH{sub 4}, CD{sub 4} and C{sub 2}H{sub 6}. The agreement between previously reported steady-state and the unsteady-state steam reforming reforming rates of this study indicates that the steam-reforming kinetic data can be quantitatively measured by TPSR experiments.

• Research Organization: Brigham Young Univ., Provo, UT (USA)
• OSTI ID: 7025481
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
ADSORPTION
ALKALINE EARTH METAL COMPLEXES
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CALCIUM COMPLEXES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CATALYSIS
CATALYST SUPPORTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPLEXES
CONTROL
DESORPTION
ELEMENTS
ETHANE
GRAVIMETRIC ANALYSIS
HYDROCARBONS
KINETICS
METALS
METHANE
NICKEL
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROMOTERS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
REFORMER PROCESSES
SORPTION
STEAM
TEMPERATURE CONTROL
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES