slide1
Download
Skip this Video
Download Presentation
ForK Tutorial Exercise 2 Creating new simulation project to estimate explosion hazard

Loading in 2 Seconds...

play fullscreen
1 / 27

ForK Tutorial Exercise 2 Creating new simulation project to estimate explosion hazard - PowerPoint PPT Presentation


  • 100 Views
  • Uploaded on

Click here to continue. ForK Tutorial Exercise 2 Creating new simulation project to estimate explosion hazard. Aim: Determination of critical conditions of thermal explosion for a storage tank (drum) containing 80% solution of cumene hydroperoxide in cumene (well stirred assumption)

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' ForK Tutorial Exercise 2 Creating new simulation project to estimate explosion hazard ' - lavender


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Click here to continue

ForK TutorialExercise 2 Creating new simulation project to estimate explosion hazard

Aim: Determination of critical conditions of thermal explosion for a storage tank (drum) containing 80% solution of cumene hydroperoxide in cumene (well stirred assumption)

Drum: Cylinder with R=0.2 m, H=0.8 m, V=0.1 m3(100 l), S=1.26 m2; void volume VV=0.01 m3(10 l), phi=1.01 (contribution of mass heat capacity of the container is small)

Product properties: =0.8 g/cm3. Cp=2 J/g/K, sample mass = 80 kg, initial temperature – 20 oC, phi=1.01

Heat exchange: General mode, U=10 W/m2/K;Tenv=50oC

Run Scoring

slide2

Click here to continue

ForK TutorialExercise 2 Creating new simulation project to estimate explosion hazard

Kinetics: Complex reaction with 2 stages in parallel:(1) A  B – N-order initiation reaction; stage rate – r1(2) A+B  2B – autocatalytic stage; stagerate - r2

Math model: (1): lnK01=20.4; n11=2; E1=102 kJ/mol; Q1=800 J/g

(2)lnK02=23; n21=4; n22=3;E2=96 kJ/mol; Q2=1800 J/g

slide4

Preliminary adjustment:

setting appropriate units

slide6

Defining the drum model

Step 1. Defining general data

Data that are to be assigned:

1. Response to be simulated (heat production)

.01

1.01

72

2. Mass of a reagent and initial T

3. Void volume and pad gas data (in our case Pgo and Tgo are optional)

4. Mass specific heat and phi-factor

slide8

Defining the drum model

Step 2. Defining Heat exchange mode

Data that are to be assigned:

1. Heat exchange mode - General

1.26

2. Неat exchange Surface

3. Неat transfer coefficient

4. Environment temperature(on the “Env. Temperqature” tab)

slide9

60.1

60.0

59.9

50

slide10

Defining the drum model

Step 3. Defining kinetic model

Data that should be assigned:

1. Model structure

2. “Elementary” models for stages

3. Kinetic parameters

Creating model of two stages in parallel(the model of fullautocatalysis)

Stage 1 – of N-order type

Stage 2 - Proto

slide11

Data that should be assigned:

1. Model structure

2. “Elementary” models for stages

3. Kinetic parameters

1. Creating model of two stages in parallel (the model of full autocatalysis)

Stage 1 – of N-order type

Stage 2 - Proto

slide12

Data that should be assigned:

1. Model structure

2. “Elementary” models for stages

3. Kinetic parameters

1. Creating model of two stages in parallel (the model of full autocatalysis)

Stage 1 – of N-order type

Stage 2 - Proto

slide13

Data that should be assigned:

1. Model structure

2. “Elementary” models for stages

3. Kinetic parameters

1. Creating model of two stages in parallel (the model of full autocatalysis)

Stage 1 – of N-order type

Stage 2 - Proto

slide14

Model created with the kinetic parameters for the second stage defined

Data that should be assigned:

1. Model structure

2. “Elementary” models for stages

3. Kinetic parameters

slide15

Kinetic parameters for the first stage have been defined

Data that should be assigned:

1. Model structure

2. “Elementary” models for stages

3. Kinetic parameters

slide16

Evaluating critical parameters of thermal explosion by using the “Effect of controls” option

1. Adjusting time interval for simulation

slide17

Note that max temperature rise (overheat) at initial environment T=60 C is very small. Next step is to elevate env. temperature

slide18

At Tenv=75 C overheat becomes much bigger. Continue to elevate Tenv till reaching explosion

slide19

There is pronounced thermal explosion at Tenv~77.5 C. More precise value can be obtained by varying Tenv with smaller step

slide27

The 2st Exercise is over.

Press [Esc] to close presentation.

If you have ForK installed we recommend to repeat this exercise by yourself.

Now the complete project can be saved into a data volume for further use

ad