Abstract
Greenhouse gas (GHG) emissions such as carbon dioxide (CO2) and methane (CH4) from oil and natural gas operation at offshore platforms have significant contribution to global warming. The reduction of these GHG emissions is possible through CO2 capture technology. This study reports the absorption performance of monoethanolamine (MEA) for the removal of CO2 from natural gas (NG) at high pressure conditions. The absorption experiments were performed in an absorption column packed with Sulzer Metal Gauze Packing at 5.0 MPa operating pressure. The absorption performance was evaluated in terms of CO2 removal (%) with liquid flow rate ranging from 1.81 to 4.51 m3/m2.h and MEA concentration of 1.0 - 4.0 kmol/m3. It was found that CO2 removal (%) had increased with increasing liquid flow rate and MEA concentration.
Highlights
The oil and gas industry contributes to the greenhouse gas (GHG) emissions through flaring and venting of unwanted sub-quality natural gas
The absorption experiments were performed in a 2.040 m high and 0.046 m inside diameter (ID) column which was packed with Sulzer Metal Gauze Packing (Sulzer Chemtech Pte Ltd, Winterthur, Switzerland)
It can be concluded that liquid flow rate has a significant effect on the percentage of CO2 removal in CO2 – MEA absorption at high pressure operation
Summary
The oil and gas industry contributes to the greenhouse gas (GHG) emissions through flaring and venting of unwanted sub-quality natural gas. Flaring produces largely carbon dioxide (CO2) emissions while venting produces largely methane (CH4) emissions [1]. The emissions of these two GHG have to be reduced and properly managed to avoid further negative impacts to the environment. As offshore oil and natural gas production increases worldwide, this industry should make the effort to reduce CO2 and CH4 emissions by developing an effective GHG capture technology for offshore platforms. Sub-quality natural gas that contains high CO2 concentration can be processed using CO2 capture technologies instead of wasting this valuable gas via flaring and venting to the atmosphere. The purified natural gas can be further commercialized and utilized in commercial applications
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