PIPELINE METHANOL INJECTION CALCULATION WORK SHEETCarroll, J.J., "Natural Gas Hydrates. A Guide for Engineers", Gulf Professional Publishers, Amsterdam, Holland, (2003)

Disclaimer: The author has made every effort to ensure that the spreadsheet, ifused unaltered, contains no errors. The method presented is asimplified one, suitable for many applications. However, theuser assumes all liability when using this spreadsheet.

Warning: This sheet is unprotected. Changes can be made to the calculationcells and these changes will affect the result.

Green Cells User must input these values from process data.Blue Cells: User gets these values from the methods presented in the accompanying

book. Chapter numbers and figure numbers refer to the above book.Yellow Cells These cells are automatically calculated. Do not enter values in them.Purple Cells: Calculated injection rates based on information provided by user.

The sheet is probably more complicated than need be because it showsall of the intermediate steps in the calculation.

Lines 5 The user inputs his own information to identify the sheet.through 9

Line 21 It is recommended that a safety factor of at least 5 Fahrenheit degrees or3 Celsius degrees be included in the calculation. The policy of yourcompany may specify a different safety factor.

PIPELINE METHANOL INJECTION CALCULATION WORK SHEETCarroll, J.J., "Natural Gas Hydrates. A Guide for Engineers", Gulf Professional Publishers, Amsterdam, Holland, (2003)

Prepared by:Client:

Project Date: 31-Oct-02 Job Number:

Quantity Units Comments ValueLine Pressure psia input parameter 1000Gas Flow Rate MMCFD input parameter 5Condensate Flow Rate bpd input parameter 10Water Flow Rate bpd input parameter 2Inlet Temperature °F input parameter 80Water Content at Inlet lb/MMCF see Chapter 10 35Outlet Temperature °F see Chapter 7 40Water Content at Outlet lb/MMCF see Chapter 10 9Hydrate Temperature °F see Chapters 3 and 4 65Safety Factor °F typically 5°F 5Depression Required °F 30 Methanol in WaterChange in Water Content lb/MMCF 26Water of Condensation lb/day 130Water of Condensation bpd 0.37Total Water bpd 2.37Total Water lb/day 830.7Methanol in Water wt% from Fig. 5-5 32.5Methanol Rate for Water lb/day 400.0 Methanol in GasRatio of Methanol Gas/Water lb/MMCF/wt% from Fig. 5-13 1.0Methanol Rate for Gas lb/day 162.5 Methanol in CondensateMethanol in Condensate mol% from Fig. 5-15 0.19Molecular Weight of Condensate lb/lbmol input parameter 126.0Density of Condensate lb/ft³ input parameter 42.0Density of Condensate lb/bbl 235.8Flow Rate of Condensate lb/day 2358Methanol in Condensate wt% 0.05Methanol Rate for Condensate lb/day 1.1TOTAL METHANOL lb/day 564TOTAL METHANOL USgal/hr 3.6

TOTAL METHANOL bpd 2.0

PIPELINE METHANOL INJECTION CALCULATION WORK SHEETCarroll, J.J., "Natural Gas Hydrates. A Guide for Engineers", Gulf Professional Publishers, Amsterdam, Holland, (2003)

Prepared by:Client:

Project Date: 31-Oct-02 Job Number:

Quantity Units Comments ValueLine Pressure kPa input parameter 3500Gas Flow Rate 1000 Sm³/d input parameter 60Condensate Flow Rate m³/d input parameter 0.5Water Flow Rate m³/d input parameter 0.1Inlet Temperature °C input parameter 45Water Content at Inlet mg/Sm³ see Chapter 10 2380Outlet Temperature °C see Chapter 7 8Water Content at Outlet mg/Sm³ see Chapter 10 278Hydrate Temperature °C see Chapters 3 and 4 40Safety Factor °C typically 3°C 3Depression Required °C 35 Methanol in WaterChange in Water Content mg/Sm³ 2102Water of Condensation kg/d 126.1Water of Condensation m³/d 0.13Total Water m³/d 0.23Total Water kg/d 226.1Methanol in Water wt% from Fig. 5-6 55.0Methanol Rate for Water kg/d 276.4 Methanol in GasRatio of Methanol Gas/Water kg/MSm³/wt% from Fig. 5-14 27.0Methanol Rate for Gas kg/d 89.1 Methanol in CondensateMethanol in Condensate mol% from Fig. 5-16 0.20Molecular Weight of Condensate kg/kmol input parameter 126.0Density of Condensate kg/m³ input parameter 650.0Flow Rate of Condensate kg/d 325Methanol in Condensate wt% 0.05Methanol Rate for Condensate kg/d 0.166TOTAL METHANOL kg/d 366TOTAL METHANOL L/hr 19.3

TOTAL METHANOL m³/d 0.46