in natural gas treatment, the removal of co2 and h2s in acid gases is a critical concern. there are various purification technologies that can be used for the removal of acid gas impurities. absorption of acid gas into amines is one preferred method in gas industries. in the past, single amines was used, but recently in order to improve absorption performance, mixed amines with different solubi...

In the light of increasing fears about climate change, greenhouse gas mitigation technologies have assumed growing importance. In the United States, energy related CO2 emissions accounted for 98% of the total emissions in 2007 with electricity generation accounting for 40% of the total. Carbon capture and sequestration (CCS) is one of the options that can enable the utilization of fossil fuels ...

The high resolution (R=25,000) infrared M band spectrum of the massive protostar NGC 7538 : IRS9 shows a narrow absorption feature at 4.779 μm (2092.3 cm) which we attribute to the vibrational stretching mode of the CO isotope in pure CO icy grain mantles. This is the first detection of CO in icy grain mantles in the interstellar medium. The CO band is a factor of 2.3 narrower than the apolar c...

In the present study, results from three different CO2 capture experimental scales (laboratory, pilot unit, and a larger pilot unit), using aqueous amine solutions of methyldiethanolamine (MDEA) 20 wt %, are compared in terms of loading capacity. All three tested scales produced results regarding CO2 absorption using MDEA aqueous solutions, which were largely in accordance with the theoretical ...

0019-1035/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.icarus.2010.06.010 ⇑ Corresponding author. E-mail address: [email protected] (R. Wordsw Collision-induced absorption is of great importance to the overall radiative budget in dense CO2-rich atmospheres, but its representation in climate models remains uncertain, mainly due to a lack of accurate experimental and theoretical data....

A Kalman filtering technique is applied to the simultaneous detection of NH3 and CO2 with a diode-laser-based sensor operating at 1.53 micrometers. This technique is developed for improving the sensitivity and precision of trace gas concentration levels based on direct overtone laser absorption spectroscopy in the presence of various sensor noise sources. Filter performance is demonstrated to b...

Gas sweetening, the removal of acid gases (H2S and CO2) by absorption in aqueous alkanolamine solutions, is an important gas treatment operation. Methyldiethanolamine (MDEA) is widely employed for gas sweetening, because of its high absorption capacity and flexibility to meet process requirements. For process simulation or design, realistic predictions of acid gas solubilities in MDEA solutions...

The research work on the unsteady state behavior of gas absorption column for CO2-NaOH system was carried out using the armfield gas absorption column. A model equation was developed by considering material balance around the system. The concentrations of the inlet and outlet liquid streams and the gas outlet stream varied as functions of time, while all other parameters, gas inlet stream conce...

We have developed a low-cost, miniaturized laser heterodyne radiometer for highly sensitive measurements of carbon dioxide (CO2) in the atmospheric column. In this passive design, sunlight that has undergone absorption by CO2 in the atmosphere is collected and mixed with continuous wave laser light that is step-scanned across the absorption feature centered at 1,573.6 nm. The resulting radio fr...