Benchmarking of a novel solid sorbent CO2 capture process for NGCC power generation. (November 2015)

• Record Type: Journal Article
• Authors: Seif El Nasr, Adel; Nelson, Thomas; Kataria, Atish; Abu-Zahra, Mohammad R.M.
• Is Part Of: International journal of greenhouse gas control. Volume 42(2015:Nov.)
• Page Start: 583
• Page End: 592
• Publication Date: 2015-11
• Subjects: CCS carbon capture and storage -- MEA monoethanolamine -- DOE United States Department of Energy -- PSU Pennsylvania State University -- RTI Research Triangle Institute International -- NGCC natural gas combined cycle -- PEI polyethyleneimine -- MBS molecular basket sorbent -- TDH transport disengaging height -- CCF capacity charge factor (for the NGCC power plant = 0.105, for NGCC with capture = 0.1111) -- TOC total overnight cost -- OCFIX total fixed operating cost -- CF capacity factor of 0.85 -- OCVAR total variable operating cost at 100% full capacity -- MWH total annual megawatt hours generated -- HRSG heat recovery steam generator -- BEC bare-erected cost -- CAPEX capital expenditures -- OPEX operational expenditures -- TS&M transporting, storing and monitoring -- O&M operating and maintenance -- PPMV parts per million by volume -- TCW tempered cooling water -- ν superficial gas velocity -- V˙ gas volumetric flow rate -- n number of vessels -- E edge length of the square cross section of the column -- HTH heat transfer height -- LMTD logarithmic mean temperature difference -- OD outer tube diameter -- ID internal tube diameter -- TCPC total capture plant costs -- COE cost of electricity -- TEG triethylene glycol -- ICARUS ASPEN Process Economic Analyzer -- LHV low heating value -- TPC total project cost; Post-combustion capture -- Solid sorbent -- Economic evaluation; Greenhouse gases -- Environmental aspects -- Periodicals; Air -- Purification -- Technological innovations -- Periodicals; Gaz à effet de serre -- Périodiques; Gaz à effet de serre -- Réduction -- Périodiques; Air -- Purification -- Technological innovations; Greenhouse gases -- Environmental aspects; Periodicals; 363.73874605
• DOI: 10.1016/j.ijggc.2015.09.014
• Languages: English
• ISSNs: 1750-5836

Abstract

Highlights: A techno-economic evaluation of polyethyleneimine (PEI)-based solid sorbent is presented. The novel solid sorbent showed lower regeneration energy demand as compared to MEA. The total efficiency penalty was improved by around two percentage points. The cost of CO2 avoided and cost of electricity are 4–10% lower for the solid sorbent process. Abstract: The successful deployment of any technology depends on many important factors. One of the critical ones that affect the success of post combustion CO2 capture technologies is the ability to reduce the increase in cost of electricity associated with retrofitting the capture unit to electricity generating power plants. High capture costs associated with conventional MEA solvent processes has opened an opportunity for the emergence of many competing technologies aimed at reducing the cost of capture. This paper presents the technical and economic benchmarking of a polyethyleneimine (PEI)-based solid sorbent CO2 capture process as compared to the conventional MEA solvent process, with both technologies applied to a natural gas combined cycle (NGCC) power plant. The results of this evaluation indicate that the PEI-based sorbent process requires approximately 25% less regeneration steam than the conventional MEA process primarily due to avoiding the energy demand required for heat of vaporization of water in the MEA process. The PEI solid sorbent based process results in approximately 6.3 power plant efficiency point reduction as opposed to an 8 efficiency points for the MEA based process. The design of the fluidized-bed absorption and regeneration reactors in the novel solid sorbent process result in significant reductions in capital costs (21% reduction compared to MEA). The economic evaluation shows that the PEI-based solid sorbent process offers attractive reductions in the cost of electricity and the CO2 capture cost. The estimated cost of electricity, after adding the CO2 capture process, is found to be 85 and 81.7 $/kWh for the MEA-based and PEI based process, respectively. Moreover, the cost of CO2 avoided for both process is estimated to be 69.8 and 62 $/ton CO2 for the MEA and PEI process, respectively.