2 replies to this topic

[sathya16]

Good Day,

 

We are using Natural Gas as a Feed with a following specification:

Components

Mol.wt

kmol/h

C1

16.04

5481.80

C2

30.07

968.67

C3

44.09

526.04

iC4

58.12

68.79

nC4

58.12

151.95

iC5

72.15

30.51

nC5

72.15

33.07

C6

86.17

14.58

C7

100.20

2.96

C8

114.22

1.57

C9

128.25

0.74

C10

142.28

0.13

N2

28.02

195.87

H2S

34.00

199.71

CO2

44.01

  609.83

 

Operating Condition 

Temperature: 30 deg Celcius

Pressure: 30 bar

 

For the Above mentioned Condition I used to Calculate Hydrate Formation Temperature by Hysys

which is 16.3deg Celcius

 

Then I tried to use TEG with concentration of 80% to reduce the Hydrate formation temperature, I got the following Results for the same flow rate of Natural Gas Feed:

S.No

TEG Flow rate

Kg/hr

TO V2003 stream

Hydrate Temperature

Deg Celcius

1

1

-42.8

2

2

-9.08

3

3

-9.285

4

4

-9.614

5

5

-10.05

6

6

-10.659

 

Can anyone able to tell how to model this kind of problem in Hysys?

 

Please find the attached documents for reference. 

Attached Files

•  New Microsoft Word Document (2).docx   54.67KB   18 downloads

[RockDock]

Hysys should do ok for calculating the hydrate temperature of a hydrocarbon/water stream. However, Hysys is not very accurate with modeling that hydrocarbon stream in the presence of glycol, alcohol, H2S or CO2. In those cases, ProMax would be the most accurate.

 

 

You can inject TEG at a higher concentration than 80%. I would recommend 99-99.7 wt%. Also, TEG is generally used in a regenerative process This has a good description: http://en.wikipedia....col_dehydration

[sathya]

Thank you for early response.