With the clear emission reduction target of China for 2020, the refining industry as a large emission source inevitably plays a significant role. The paper confirmed and assessed three commercially available CO2separation technologies for refineries, vacuum swing adsorption (VSA), monoethanolamine (MEA) and membrane absorption (MA). The economic results indicate that the capital cost of constructing a CO2capture unit is 35.996 M¥, 34.418 M¥, 37.502 M¥, respectively. And the corresponding cost of avoided is 379.8 ¥/tCO2, 249.6 ¥/tCO2and 376.5 ¥/tCO2. Sensitivity analyses are also performed examining the effect of CO2price on economic feasibility, as well as improvements of regeneration energy demand and CO2capture system on the CO2avoided cost. The regeneration energy demand impacts the avoided cost significantly, whereas CO2capture system demonstrates insensitivity. Though the CO2avoided cost for MEA case is highest, MEA has been commercially the most available processe so far for existing refineries. However, MA will be the most promising alternative to chemical absorption in the future, provided that membrane performance is further improved. In addition, the CO2avoided cost of VSA is close to that of MEA, but other economic indicators are optimal due to a large amount of H2recovered. Currently, without any incentive and a major technological break-through, CO2capture from the source of hydrogen production units at Chinese refineries is the most attractive opportunity.
Polyamidoamine-facilitated poly(ethylene glycol)/ionic liquid based pressure swing membrane absorption process for CO2 removal from shifted syngas
