Energy Consumption Analysis of Air Separation Process for Oxy-Fuel Combustion System

Yong Qiang Xiong; Peng Luo; Ben Hua

doi:10.4028/www.scientific.net/AMR.1033-1034.146

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1033-1034Energy Consumption Analysis of Air Separation...

Energy Consumption Analysis of Air Separation Process for Oxy-Fuel Combustion System

Abstract:

Oxy-fuel combustion is a leading potential technology to capture CO₂. Because the oxygen production process is causing the largest power penalty in oxy-fuel combustion system, it is essential to cut down oxygen separation power penalty for capturing CO₂ at low cost. This paper presents the energy consumption analysis results of air separation units with three different cycles offering for oxy-fuel combustion systems. The study shows that when the gaseous oxygen compression (GOXC) cycle is selected for pressuring oxygen product stream, the specific consumption of high pressure and low purity oxygen with triple column cycle is about 6.4-7.2% less than that of with dual column cycle. And when choosing triple column cycle for oxygen production, an air separation unit with pumped liquid oxygen (PLOX) cycle is a better option than with GOXC cycle because it helps to improve plant safety and to decrease energy consumption of high pressure oxygen products.

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Periodical:

Advanced Materials Research (Volumes 1033-1034)

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146-150

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1033-1034.146

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Online since:

October 2014

Authors:

Yong Qiang Xiong*, Peng Luo, Ben Hua

Keywords:

Air Separation Unit (ASU), Energy Consumption Analysis, Pumped Liquid Oxygen (PLOX), Simulation, Triple Column Cycle

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