Absorption Performance Study of STONVENT for C02-Natural Gas System

• Main Author: IBRAHIM, ANAS
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi PETRONAS 2010
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/9412/1/2010%20-%20Adsorption%20Performance%20Study%20of%20Stonvent%20for%20CO2-Natural%20Gas%20System.pdf; http://utpedia.utp.edu.my/9412/
• Institution: Universiti Teknologi Petronas

As sweet gas in Malaysia has gradually decreased and most of the remaining natural gas is acidic gas where C02 is found highly contained (approximately 80% volumetric), C02 separation technique has become essential in which to remove as many C02 as possible. Numerous of separation techniques are available such as absorption into a liquid solvent, adsorption onto a solid, cryogenic separation, permeation through membranes, and chemical conversion but however, each of these techniques has limitations which cannot cater the problem mentioned above. In order to achieve natural gas sweetening, absorption is the most promising technique to remove the C02 gas. There are several liquid used as the solvent such as alkanolamines, potassium carbonate and sodium hydroxide. Alkanolamines however are the most commonly used solvent in the current industry but it still has the drawbacks which brings to the introduction of an enhanced amine-based solvent called STONVENT. Experimental work was done to evaluate the absorption performance of the solvent under atmospheric pressure, different temperature ranging from 30 to 50 °C and different liquid flowrates (0.5 and 1.0 Llmin). 50 °C is found to be the best temperature while 1.0 Llmin gives higher absorption efficiency. The recycle capacity of the solvent also has been studied where it is found that STONVENT has high recycle capacity as it can absorb as much even until six cycles.