Now showing items 21-30 of 75
Modeling flow in disordered packed beds from pore-scale fluid mechanics
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1997-06)
Network models are an effective means of incorporating pore-scale heterogeneity into flow models of porous materials. The drawback to these models used to be the inability to obtain quantitative macroscopic parameters ...
Synthesis and characterization of molybdenum nitride hydrodenitrogenation catalysts
(Elsevier, 1992-06-30)
Details concerning the relationships between the structural, chemical and catalytic properties of Mo nitrides have been elucidated. A series of Mo nitride catalysts were prepared by the temperature programmed reaction of ...
The structure and function of supported molybdenum nitride hydrodenitrogenation catalysts
(Elsevier, 1994-03)
A series of [gamma]-Al2O3 supported Mo nitrides were prepared by the temperature programmed reaction of supported molybdates with NH3. Several loadings, heating rates, and space velocities were employed in an attempt to ...
Pt/MCM-41 catalyst for selective catalytic reduction of nitric oxide with hydrocarbons in the presence of excess oxygen
(Kluwer Academic Publishers-Plenum Publishers; Kluwer Academic Publishers ; Springer Science+Business Media, 1998-03)
First results are reported on the use of MCM-41 mesoporous molecular sieve as the support for Pt for the selective catalytic reduction of NO by hydrocarbons in the presence of O 2 . MCM-41 provided the highest specific NO ...
Optimal feedback control of batch reactors with a state inequality constraint and free terminal time
(Elsevier, 1994)
In this paper we derive optimal state feedback laws for end-point optimization of a dynamic system where the final time is free and the system has a scalar inequality constraint. The existence of a singular region as well ...
Chemical extraction of indigo from Indigofera tinctoria while attaining biological integrity
(Kluwer Academic Publishers; Springer Science+Business Media, 1999-08)
Indigofera tinctoria was permeabilized with 20% methanol (v/v) at 25 °C and released 8±2 μg indigo g −1 dry plant material (excluding roots). This is equivalent to 42±11% of the total indican within the cells. The plants ...
Simulation of structural phenomena in mixed-particle fluidized beds
(Wiley Subscription Services, Inc., A Wiley Company, 1998-03)
A statistical mechanical simulation was developed and used to predict the macroscopic and microscopic behavior of fluidized beds. In particular, the model was used to study structural phenomena in liquid fluidized beds ...
Olefin/paraffin separations by adsorption: Π-Complexation vs. kinetic separation
(Wiley Subscription Services, Inc., A Wiley Company, 1998-04)
Monolayer dispersed AgNO 3 on silica gel was prepared by thermal dispersion. This sorbent exhibited superior adsorption properties for olefin/parafin separations by selective adsorption of olefins through Π-complexation. ...
Determination of flow profiles in porous media using shifts in gamma spectra
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1990-06)
A new technique was developed to determine the tracer location and fluid velocity in porous media nonintrusively. This technique exploits the competitive effects between the photoelectric interaction and the Compton ...
Theoretical basis for the Dubinin-Radushkevitch (D-R) adsorption isotherm equation
(Kluwer Academic Publishers; Springer Science+Business Media, 1997-09)
The Dubinin-Radushkevitch (D-R) equation, which was originally proposed as an empirical adaptation The Polanyi adsorption potential theory, has been the fundamental equation to quantitatively describe the adsorption gases ...