公开(公告)号：EP3871755A1

公开(公告)日：2021-09-01

申请号：EP21156390.3

申请日：2015-10-20

申请人： Research Triangle Institute

发明人： DENTON, David L. ,  GUPTA, Raghubir P. ,  TURK, Brian S. ,  GUPTA, Vijay ,  PALIWAL, Himanshu

IPC分类号： B01D53/48 ,  B01D53/62 ,  B01D53/50

摘要： This invention relates to a method for removing acid gases from a gas stream, the method comprising: flowing a feed gas into a desulfurization unit including a fluidized-bed reactor to remove a substantial fraction of a sulfur compound from the feed gas, wherein the desulfurization unit produces a desulfurized gas, and wherein flowing the feed gas into the desulfurization unit comprises flowing the feed gas into contact with a sorbent; and flowing the desulfurized gas into a CO 2 removal unit to selectively remove a substantial fraction of CO 2 from the desulfurized gas, wherein flowing the feed gas into the desulfurization unit is done at a temperature range of 204 °C or greater; characterised in that the method comprises flowing the desulfurized gas, before CO 2 removal, into contact with steam in a water-gas-shift unit in the presence of a shift catalyst to produce carbon dioxide (CO 2 ) and hydrogen gas (H 2 ), and in that the sorbent is selected from the group consisting of: a metal oxide, zinc oxide, copper oxide, iron oxide, vanadium oxide, manganese oxide, stannous oxide, nickel oxide, a metal titanate, zinc titanate, a metal ferrite, zinc ferrite, copper ferrite, and a combination of two or more of the foregoing, wherein the sorbent comprises a support selected from the group consisting of: alumina (Al 2 O 3 ), silicon dioxide (SiO 2 ), titanium dioxide (TiO 2 ), a zeolite, and a combination of two or more of the foregoing, and wherein the sorbent is regenerable.