Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

For mixing

Figure 2.3 Choice of reactor type for mixed parallel and series reactions when the parallel reaction has a higher order than the primary reaction. Figure 2.3 Choice of reactor type for mixed parallel and series reactions when the parallel reaction has a higher order than the primary reaction.
Thus the weighted network area AJ itwork is 9546 m. Now calculate the network capital cost for mixed materials of construction by using AI t ork... [Pg.231]

In the alternative surface phase approach, Eq. IV-36 may be expanded for mixed films to give [245]... [Pg.143]

One of the major limiting factors for the time resolution of flow-hibe experiments is the time required for mixing reactants and—to a lesser extent—the resolution of distance. With typical fast flow rates of more than 25 ms [42, 43] the time resolution lies between milliseconds and microseconds. [Pg.2117]

Analogous considerations apply to spatially distributed reacting media where diffusion is tire only mechanism for mixing chemical species. Under equilibrium conditions any inhomogeneity in tire system will be removed by diffusion and tire system will relax to a state where chemical concentrations are unifonn tliroughout tire medium. However, under non-equilibrium conditions chemical patterns can fonn. These patterns may be regular, stationary variations of high and low chemical concentrations in space or may take tire fonn of time-dependent stmctures where chemical concentrations vary in botli space and time witli complex or chaotic fonns. [Pg.3054]

Thus far we have considered systems where stirring ensured homogeneity witliin tire medium. If molecular diffusion is tire only mechanism for mixing tire chemical species tlien one must adopt a local description where time-dependent concentrations, c r,f), are defined at each point r in space and tire evolution of tliese local concentrations is given by a reaction-diffusion equation... [Pg.3064]

Comparison with Eq. (7) shows that the the non-adiabatic operator matrix, A, has been added. This is responsible for mixing the nuclear functions associated with different BO PES. [Pg.277]

U. Schmitt and J. Brinkmann. Discrete time-reversible propagation scheme for mixed quantum classical dynamics. Chem. Phys., 208 45-56, 1996. [Pg.420]

Abstract. We present novel time integration schemes for Newtonian dynamics whose fastest oscillations are nearly harmonic, for constrained Newtonian dynamics including the Car-Parrinello equations of ab initio molecular dynamics, and for mixed quantum-classical molecular dynamics. The methods attain favorable properties by using matrix-function vector products which are computed via Lanczos method. This permits to take longer time steps than in standard integrators. [Pg.421]

IXDCf is faster than MINDO/3, MNDO, AMI, and PM3 and, unlike C XDO, can deal with spin effects. It is a particularly appealing choice for UHF calculations on open-shell molecules. It is also available for mixed mode calculations (see the previous section ). IXDO shares the speed and storage advantages of C XDO and is also more accurate. Although it is preferred for numerical results, it loses some of the simplicity and inierpretability of C XDO. [Pg.149]

Very strong stirring equipment is needed for mixing because of the high viscosity, and long tubular reactors with low cross-sectional area are needed for heat exchange. [Pg.397]

Styrene block copolymers have been used as compatihilizers for mixed plastics to permit their processing for appHcations such as those outlined earlier (52,61). [Pg.232]

Motionless inline mixers obtain energy for mixing and dispersion from the pressure drops developed as the phases flow at high velocity through an array of baffles or packing in a tube. Performance data on the Kenics (132) and Sul2er (133) types of motionless mixer have been reported. [Pg.75]

Inline motionless mixers derive the fluid motion or energy dissipation needed for mixing from the flowing fluid itself. These mixers iaclude orifice mixing columns, mixing valves, and static mixers. [Pg.435]

Solids. For mixing of soflds the mixers can be categorized according to the mixing mechanism used. [Pg.439]

Fluidization. Particles suspended in a gas stream behave like a Hquid. They can be mixed by turbulent motion in a duidized bed. This mixer is used for mixing and drying, or mixing and reaction. [Pg.440]

Because the highest possible interfacial area is desired for the heterogeneous reaction mixture, advances have also been made in the techniques used for mixing the two reaction phases. Several jet impingement reactors have been developed that are especially suited for nitration reactions (14). The process boosts reaction rates and yields. It also reduces the formation of by-products such as mono-, di-, and trinitrophenol by 50%. First Chemical (Pascagoula, Mississippi) uses this process at its plant. Another technique is to atomize the reactant layers by pressure injection through an orifice nozzle into a reaction chamber (15). The technique uses pressures of typically 0.21—0.93 MPa (30—135 psi) and consistendy produces droplets less than 1 p.m in size. The process is economical to build and operate, is safe, and leads to a substantially pure product. [Pg.65]

Reactor Internals and Unit Hardware. Requirements for mixing feed components or separating products may determine minimum pilot unit size. If reactants caimot be premixed before they are passed into the reactor, the effectiveness of the inlet distributor in mixing the reactants can markedly affect reactor performance. This is especially tme for gases, multiple phases, or Hquid streams of greatly different kinematic viscosities. [Pg.519]


See other pages where For mixing is mentioned: [Pg.322]    [Pg.152]    [Pg.2949]    [Pg.347]    [Pg.228]    [Pg.314]    [Pg.110]    [Pg.68]    [Pg.66]    [Pg.410]    [Pg.169]    [Pg.195]    [Pg.72]    [Pg.188]    [Pg.233]    [Pg.241]    [Pg.406]    [Pg.55]    [Pg.36]    [Pg.176]    [Pg.267]    [Pg.544]    [Pg.145]    [Pg.409]    [Pg.412]    [Pg.548]    [Pg.512]    [Pg.518]    [Pg.564]   
See also in sourсe #XX -- [ Pg.173 ]

See also in sourсe #XX -- [ Pg.173 ]




SEARCH



A mixed tobermorite-jennite-type model for C-S-H gel

AS for the Mixing of Ideal Gases at Constant T and

Accounting for Axial Mixing

Accused for Mixing Arsenic Into Medicine - Exculpated by Stromeyer

Adsorption isotherm for single and mixed surfactant systems

Binary Phase Diagrams for Mixed Valency Metals

Calorimetric Techniques for Measuring Heat of Mixing

Commercial Processes for Mixed Solid Waste

Compatibilisers For Mixed Waste

Complete-Mixing Model for Gas Separation by Membranes

Complete-Mixing Model for Multicomponent Mixtures

Containers, for mixing

Coprocessing for Fuel from Mixed Plastic Waste

Crystallization for a well-mixed continuous crystallizer

Deepwater Sampler for Trace Elements (Allowing Air to Mix with the Sample)

Developing Strategies for Segregation, Mixing and Direct Recycle

Dimensionless groups for mixing

Drivers for Mixing in Micro Spaces

Enthalpy of mixing for an ideal dilute solution

Equipment for Blend Preparation by Melt Mixing of Polymers

Equipment for Mixing of Solids

Equipment for Viscous Mixing

Experimental Methods for Determining Mixing Quality and Residence Time Distribution

F Approximate Results for Surface Temperature with Specified Heat Flux or Mixed Boundary Conditions

Feeding and Weighing Equipment for a Batch Mixing Process

Functional and Mixed Ligand Silicon Alkoxides for More Facile Hydrolysis

General Principle for Mixed Metal Contaminants

General requirements for mixing and layer construction of CSM

General requirements for mixing and layer construction of HBM

Gibbs Energy of Mixing for Polyelectrolytes

Gibbs energy of mixing for an athermic solution

Guidelines for VB Mixing

H COSY with Varying Mixing Times for the Coupling

Hierarchy of Stochastic Models for Well-mixed, Chemically Reacting Systems

How to carry out a mixed-solvent selection for recrystallization of an unknown compound

Index for evaluation of mixing performance

Isotherms for Single and Mixed Gases

Levels for Lead-Free and Mixed Assembly with Various Surface Finishes

Linear viscoelasticity as a conceptual background for the mixing of rubber

Manufacture of Mixed Oxide Catalysts for Acrolein and Acrylonitrile

Mass Spectrometry Strategies for Ultra-fast Mixing and Incubation

Mix design for slurry surfacing

Mix design for slurry surfacing on airfields

Mix design procedure for micro-surfacing

Mix design procedure for slurry seal

Mixed Flow Fermentors for

Mixed Reactor for Reactions in Liquid Media

Mixed-conducting perovskite reactor for high-temperature applications

Mixing Requirement for Static Tanks

Mixing Rules for Hard Spheres and Association

Mixing Rules from Models for Excess Gibbs Energy

Mixing and Combining Rules for SAFT

Mixing data for

Mixing equipment for

Mixing equipment for gases

Mixing equipment for liquids

Mixing equipment for solids and pastes

Mixing for binary systems

Mixing rules for

Mixing rules for cubic EOSs

Mixing rules for cubic equations of state

Mixing rules for equations of state

Mixing, for polymers

Mixing-Length Models for Turbulent Transport

Models Explicitly Accounting for Mixing

Modified Marshall mix design for mixtures with maximum nominal aggregate size 25 mm

NCHRP mix design practice for WMA - brief description

Number for mixing

Perfect mixing, model for

Perovskites and Related Mixed Oxides for SOFC Applications

Phase Diagram for the Illite-Glauconite Mixed Layered Minerals

Phenomenological model for turbulent mixing

Pilot Plant Scale Studies for the Liquefaction of PVC Mixed Plastics

Potential Theory Isotherms for Single and Mixed Gases

Prandtls Mixing Length Hypothesis for Turbulent Flow

Principles of Reactor Design for Mixing-Sensitive Systems

Process Considerations for Solid-Liquid Mixing Operations

Properties of mixing for ideal mixtures

Property Changes of Mixing for Ideal Gases

RANS models for scalar mixing

Rate and time for mixing

Recommendations for Solid-Liquid Mixing Equipment

Residence Time Distribution A Tool for Analysis of Fluid Mixing Pattern

Scale-Up for Mixing

Simple Guidelines for Valence Bond Mixing

Simple model for mixed surfactant solutions

Specific Insight for Removal of Mixed Heavy Metals, Including Cr, As, and Hg

Technologies for Tertiary Recycling of Mixed Plastic Waste (MPW)

Theory for Mixed Micelles

Three-Dimensional Mixed Formulation for Creeping Flow Problems

Udenfriend System A Model for Mixed Function Oxidase

Units for chemical abundance Concentrations and mixing ratios

Valence Bond Configuration Mixing Diagrams for Proton-Transfer Processes

Wet process for mixing materials

© 2024 chempedia.info