Advanced petroleum coke oxy‐combustion power generation with carbon capture and sequestration: Part II—Environmental assessment and cost of CO₂ avoided

Abstract

The life-cycle environmental impact assessment and cost of the CO 2 avoided (CCA) of a petroleum coke oxy-combustion electric power generation technology operated with and without carbon capture and sequestration (CCS) are discussed.In an extension of our work on the design and economics presented in Part I, the environmental assessment was carried out for three candidate petroleum coke oxycombustion designs: petcoke oxy-combustion operated without carbon capture and sequestration (CCS); petcoke oxy-combustion operated with CCS; and petcoke oxycombustion with CO 2 purification by distillation and CCS. The environmental lifecycle assessment of the designs was computed using both TRACI 2.1 midpoint and ReCiPe 2016 midpoint and endpoint methods. Using a levelized cost of electricity, the CCA was also employed as a performance metric for each of the designs. The results showed a life-cycle GWP of 1089 kgCO 2 eq/MWh, 17.32 kgCO 2 eq/MWh, and 75.65 kgCO 2 eq/MWh for the petcoke oxy-combustion design operated without CCS, petcoke oxy-combustion design operated with CCS, and petcoke oxy-combustion with CO 2 purification by distillation and CCS, respectively. It was also found that acidification potential and particulate matter emissions were higher for the petcoke oxy-combustion design operated without CCS due to the venting of SO 2 to the atmosphere. With a levelized cost of electricity between $90.94/MWh and $102.8/MWh, the CCA of the CCS-enabled designs were between $10.43/tCO 2 eq and $24.35/tCO 2 eq, which is competitive with most other carbon capture options for large-scale fossil-based power plants. When the cost parameters were varied at the worst-case scenario, the highest CCA observed was $115.9/tCO 2 eq.

Advanced petroleum coke oxy‐combustion power generation with carbon capture and sequestration: Part I—Design and techno‐economic analysis

“…While the design and economics are presented in this paper, the life-cycle environmental impact assessment is presented in Part II of this paper. [16] Three petcoke oxy-combustion processes were designed and examined: petcoke oxy-combustion (POXY), petcoke oxycombustion with carbon capture and sequestration (CCS) (POXY CCS), and petcoke oxy-combustion with CO 2 purification by distillation and CCS (POXYD). The POXY design showcases the system's performance of a status quo process operated without CCS, while the POXY CCS design highlights the benefits and parasitic electrical demand of adopting CCS.…”

“…In this work, we present the three process designs, their simulation results, and a comparative eTEA, with the first complete life-cycle analysis of the proposed processes presented in Part II of this work. [16] 2 | METHODOLOGY…”