PROCESS SIMULATION FOR INHIBITORS ADDITION IN NATURAL GAS HYDRATE FORMATION WITH HIGH CARBON DIOXIDE CONTENT

• Main Author: Aryanti Lestari, Fitri
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/83248
• Institution: Institut Teknologi Bandung

The presence of hydrates in oil and natural gas refining operations can cause blockages in piping streams. This can occur when there is water content in the flow with operating conditions that meet the hydrate formation curve. However, identifying the hydrate curve can be done using various methods ranging from calculations to simulators. For this reason, it is essential to know how much deviation occurs by using more than one method. Based on this condition, this research will be focused on obtaining the deviation results of the data generated from the simulation when compared with the existing literature. This thesis will use natural gas data from various wells in the literature, including before adding the hydrate inhibitor and after adding the inhibitor. The inhibitors chosen are Methanol (MeOH) and Mono-Ethylene Glycol (MEG). The simulation of natural gas contains 2692% mol CH4, 8–70% mol CO2, with the addition of Methanol (MeOH) and Mono-Ethylene Glycol (MEG) by 10–20% mol at a pressure range of 2–12 MPa and a temperature of 267–288 K. Simulations were carried out on a total of 10 samples using Aspen HYSY V10 with the PengRobinson fluid package. In samples with low CO2 concentration, the deviation occurs in the pressure range of 3,22–13,6% and in the temperature range of 0,11– 1,14%. Whereas at high CO2 concentrations the pressure deviation occurs at 1,02– 24,7% and temperature in the range of 0,07% - 1,18%. This study also shows a shift in hydrate formation due to the addition of hydrate inhibitors up to 10,5 K for MeOH and 4,35 K for MEG.