Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Lee F. Brown"'
Publikováno v:
International Journal of Hydrogen Energy. 29:1047-1064
This work presents thermodynamic analyses of autothermal processes using five fuels—natural gas, methanol, ethanol, dimethyl ether, and gasoline. Autothermal processes combine exothermic and endothermic reactions. The processes considered here coup
Publikováno v:
AIChE Journal. 48:820-831
In an endothermic reaction, such as methanol-steam reforming, the reaction rate can be limited by the ability to supply heat to the reactor. Heat transfer from the reactor wall normally supplies the required energy in such processes. Drawbacks, such
Autor:
Lee F. Brown
Publikováno v:
International Journal of Hydrogen Energy. 26:381-397
Seven common fuels are compared for their utility as hydrogen sources for proton-exchange-membrane fuel cells used in automotive propulsion. Methanol, natural gas, gasoline, diesel fuel, aviation jet fuel, ethanol, and hydrogen are the fuels consider
Autor:
Lee F. Brown, Michael H. Ebinger
Publikováno v:
Computers & Chemistry. 22:419-427
Four simple precipitation problems are solved to examine use of numerical equilibrium codes. The study emphasizes concentrated solutions, assumes both ideal and non-ideal solutions, and employs different databases and different activity-coefficient r
Autor:
Lee F. Brown, Owen T. Hanna
Publikováno v:
Chemical Engineering Science. 46:2749-2753
This paper describes a new approach for the numerical solution of Fredholm integral equations of the first kind (FIEFK). Examples of where this kind of problem may occur in chemical engineering include determination site-energy distributions, determi
Publikováno v:
Chemical Engineering Science. 46:1349-1360
This study presents the mathematical bases for a determination of itnernal temperatures within flowing systems using chemically reacting tracers. It considers plug-flow (or piston-flow) systems. The differential equations for reactant conversion can
Publikováno v:
Fuel. 65:1356-1359
Interactions between isotopically labelled potassium carbonate (K213CO3) and surface oxides on carbon were studied by temperature-programmed reaction, using carbons with different surface-oxide concentrations. 13CO2 was produced
Autor:
Lee F. Brown, Weldon K. Bell
Publikováno v:
The Journal of Chemical Physics. 61:609-618
Momentum balances are derived for the isothermal, isobaric counterdiffusion of two gases within a capillary, with one of the gases adsorbed in a mobile phase on the surface of the capillary. Interactions between the gases and the mobile adsorbed phas
Publikováno v:
Journal of Catalysis. 71:244-256
The relationships between the amounts of adsorbed reactant and product and the forward and reverse reaction rates were measured for the orthopara hydrogen system on a chromia-alumina catalyst at 75.7 K. Total adsorption was measured rapidly; individu
Autor:
Lee F. Brown, David R. Stoll
Publikováno v:
Journal of Catalysis. 32:37-49
A pellet of gamma alumina with a unimodal pore structure and a mean pore radius of 47 A was exposed to cycles involving counterdiffusing butenes and helium, counterdiffusing nitrogen and helium, and varying catalyst treatments. When butenes were pres