High pressure CO2 absorption from natural gas using piperazine promoted 2-amino-2-methyl-1-propanol in a packed absorption column

Review on the mass transfer performance of CO2 absorption by amine-based solvents in low- and high-pressure absorption packed columns

“…Their results indicated that high pressure, amine ow rate, and amine concentration had a signicant effect on K GCO 2 a V , and that by increasing these parameters, the K GCO 2 a V values would increase. They also showed that the K GCO 2 a V values were unaffected by the gas ow rate and that the optimal point for the temperature of the inlet amine to the absorption column was found to be 40 C. Halim, et al 80 performed their experiments for removing CO 2 from a mixture of CO 2 and methane using an AMP-PZ solution in a packed column (packing height 2.04 m; column diameter 0.046 m) with a packing type of Sulzer gauze. The aim of their work was to determine the K GCO 2 a V values under high pressures (10-40 bar).…”

“…The K GCO 2 a V values were obtained at a xed CO 2 concentration of 40% mole, a total amine concentration of 30% wt (PZ with 7 wt% and AMP with 23 wt%), an amine ow rate range of 2.89-3.97 m 3 m À2 h À1 , a gas ow rate range of 33-51 kmol m À2 h À1 , and a feed temperature range of 30 C to 35 C. Their results indicated that high pressure, amine ow rate, and amine concentration had a large effect on K GCO 2 a V , and; the K GCO 2 a V values were unaffected by the gas ow rate. Following the work of Halim, et al, 80 Hairul, et al 81 performed experiments under different conditions of operating parameters. Their setup for an absorber column was similar the one in the work of Halim, et al 80 They determined K GCO 2 a V under different operating conditions over a pressure range of 10-50 bar, a CO 2 concentration range of 30% to 50% mol, an amine concentration range of 3-9 wt% for PZ and 23-30 wt% for AMP, an amine ow rate range of 2.89-4.33 m 3 m À2 h À1 , a gas ow rate range of 33-40 kmol m À2 h À1 , and feed temperature range of 30 C to 35 C. Their results showed that by increasing pressure above 20 bar, K GCO 2 a V increased, and by increasing the CO 2 concentration in the feed gas, K GCO 2 a V decreased.…”

“…Following the work of Halim, et al, 80 Hairul, et al 81 performed experiments under different conditions of operating parameters. Their setup for an absorber column was similar the one in the work of Halim, et al 80 They determined K GCO 2 a V under different operating conditions over a pressure range of 10-50 bar, a CO 2 concentration range of 30% to 50% mol, an amine concentration range of 3-9 wt% for PZ and 23-30 wt% for AMP, an amine ow rate range of 2.89-4.33 m 3 m À2 h À1 , a gas ow rate range of 33-40 kmol m À2 h À1 , and feed temperature range of 30 C to 35 C. Their results showed that by increasing pressure above 20 bar, K GCO 2 a V increased, and by increasing the CO 2 concentration in the feed gas, K GCO 2 a V decreased. In addition, the performance of AMP in removing CO 2 from natural gas was compared with the AMP-PZ solution, and results showed the AMP-PZ system to be superior in terms of CO 2 removal efficiency.…”

“…Increase of pressure in an absorber column can lead to a decrease of CO 2 concentration in equilibrium with the amine solution and, as a result, the driving force for mass transfer can increase. Halim, et al 80 showed that the absorption of CO 2 (from natural gas) in an AMP-PZ solution under a pressure range of 20-40 bar increased K GCO 2 a V . However, the increasing absorber pressure in CO 2 capture post-combustion processes will increase the cost of operation.…”

Techno-Economic Analysis of a Novel Two-Stage Flashing Process for Acid Gas Removal from Natural Gas

“…Product natural gas quality standards for natural gas content also have more stringent restriction: CO 2 needs to be less than 2% (mol), and H 2 S needs to be less than 6 mg•m −3 in sweet gas. Therefore, it is of critical importance to remove the acid gases in natural gas to a certain extent to meet the requirements of commodity gas quality standards [6].…”