Scribd
Upload
182 views4 pages

Methanolinjection - XLS: This Spreadsheet Calculates The Minimum Amount of Required Inhibotor Usage. Instructions

This spreadsheet calculates the minimum amount of methanol needed as a hydrate inhibitor for a gas pipeline. It requires the user to input gas flow rate, pressure, temperature, and water content data. It then performs intermediate calculations to determine the water content to be removed, methanol properties, and inhibition effect. The final output is the minimum daily and hourly injection rates of methanol needed to safely inhibit hydrate formation at 38.62 lb/MMscf, 386.18 lb/day, and 58.16 gal/day respectively.

Uploaded by

Anonymous jqevOeP7
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
182 views4 pages

Methanolinjection - XLS: This Spreadsheet Calculates The Minimum Amount of Required Inhibotor Usage. Instructions

This spreadsheet calculates the minimum amount of methanol needed as a hydrate inhibitor for a gas pipeline. It requires the user to input gas flow rate, pressure, temperature, and water content data. It then performs intermediate calculations to determine the water content to be removed, methanol properties, and inhibition effect. The final output is the minimum daily and hourly injection rates of methanol needed to safely inhibit hydrate formation at 38.62 lb/MMscf, 386.18 lb/day, and 58.16 gal/day respectively.

Uploaded by

Anonymous jqevOeP7
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
You are on page 1/ 4

MethanolInjection.

xls
This spreadsheet calculates the minimum amount of required inhibotor usage.
Instructions:
1) Update input data in blue;
2) View result.
Input Data:
Gas flow rate:
Gas specific gravity (g):
Minimum pressure (pm):

10 MMscfd
0.7 air = 1
900 psia

Inlet gas temperature (ti):

90

Hydrate temperature pm:


Operating temperature (to):

64
40

Water content at ti and pm:


Water content at to and pm:
Inhibitor solution density:
Inhibitor concentration (W in):

F
F
F

48 lb/MMscf
9.6 lb/MMscf
6.64 ppg
100 Wt %

Intermediate Calculations:
Water to be removed from gas (wG):

38.4 lb/MMscf

Molecular weight of inhibitor (MW)inh:

32

Hammerschmidt constant for inhibitor (KH):

2335

Depression of hydrate formation temperature (th):

24

Inhibitor requirement based on Hammerschmidt's method:

W h=

( MW )inh t h
100
( MW )inh t h + K H

24.75 Wt %

12.63 lb/MMscf

Liquid phase:

I 100=

WG

100 100

W out W in

Gas phase:

lbm MeOH/MMscf
WT % NeOH in Water
Inhibitor requirement:
System total:

=f ( P , t )

1.05

25.99 lb/MMscf

Inhibitor requirement:
Daily injection rate:
Hourly injection rate:

38.62
386.18
58.16
2.42

lb/MMscf
lb/day
gal/day
gal/hour

Check:

I 100=

WG
KH

100
1+

( MW )inh t h W in

12.63

You might also like