ReRank

Purpose of the program

ReRank is the first commercial software on the market intended for Reactivity Rating of individual substances and mixtures.

Handling data

ReRank is based on the project concept. A project unites all the data necessary for determination of reactivity indicators – kinetic model, parameters of simulation, and results. There are three data bases for saving projects in accordance with the indicator calculated. It allows accumulation and convenient comparative analysis of information about reactivity characteristics of samples tested.

ReRank provides direct access to the ForK and DesK data bases which allows easy import of kinetic models  created by using ForK or DesK.

Kinetic models

ReRank can use both formal models based on conversions as state variables and descriptive models based on concentrations. Kinetic models can be imported from ForK and DesK programs or created manually when working with ReRank.

Reactivity indicators subject to determination

The following reactivity indicators can be determined by using ReRank:

• the Reactivity Rating Number of chemical products based on instantaneous energy release (Instantaneous Power Density, IPD) at 250 C which meets the National Fire Protection Association NFPA (USA) requirements
• the advanced Reactivity Rating Number of chemical products based on calculation of maximum energy release (Maximum Power Density, MPD) in the course of exothermic reaction at a constant sample temperature. This provides a safer estimate compared to the standard NFPA method.
• time to conversion limit under isothermal conditions, TCL, as a function of temperature TCL(T), which reflects thermal stability of a compound and can be used for comparison of substances
• adiabatic time to maximum rate, TMR, as a function of initial temperature TMR(Tin), which indicates the probability of an explosive accident
• energy content or Total energy release as a function of initial temperature, TER(Tin), which can be used to measure the potential severity of an accident.

Reactor’s model

A chemical reaction is considered to proceed in a continuous stirred BATCH reactor which can operate under the following thermal modes:

• forced temperature mode - reactant temperature is equal to the environment temperature; this mode is used for determination of Reactivity Rating Number and stability indicator TCL
• adiabatic mode - no heat exchange with environment; this mode is used for calculation of TMR and TER.

Kinetic models

ReRank can use both formal models based on conversions as state variables and descriptive models based on concentrations. Kinetic models can be imported from ForK and DesK programs or created manually when working with ReRank.

Physical properties

When using formal models necessary properties are defined by the User.

When descriptive models are applied the simplified built-in database is used. It can be replenished by the User. The additive rules are utilized for calculation of properties of multi-component mixtures.

Installation

ReRank 2x and higher is compatible with Windows 2000/XP/VISTA/7.

ATTENTION! When installing ReRank under Windows 7 the recommended path is C:\Users\[username]

Requirements:

CPU: Intel Pentium 1200 MHz and faster
Memory: 512 MB
Disk space: 50 MB
CD-ROM: present
OS: MS Windows 2000, XP, VISTA, 7