Achievement of high CO2 concentration in the flue gas at slightly positive pressure during oxy-coal combustion in a 300 kWth furnace

Chung Cheng Chi, Ta Hui Lin, Wei Cheng Huang, Shuhn Shyurng Hou, Pai Yi Wang

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5 Citations (Scopus)

Abstract

Abstract This study explores the combustion characteristics of a 300 kWth air-firing furnace adapted for oxy-firing combustion. The influences of operating pressure and oxygen/recycled flue gas (RFG) blend ratio on the combustion characteristics of oxy-coal firing were examined, especially on the exhausted CO2 concentration. High purity CO2 (94.1%) at the exit of the system was achieved for oxy-coal combustion at the optimized operation conditions (i.e., an RFG flow rate of 227 Nm3/h, feeding rates of oxygen and coal of 42.5 Nm3/h and 21 kg/h, respectively, and a slightly positive pressure of +100 Pa). The achievement of 94.1% CO2 emission has great potential for reducing CO2 emissions by carbon capture and storage and thus mitigating global climate change. Moreover, compared with air-firing operation, an NO emission reduction of around 66% was obtained in the oxy-firing operation.

Original languageEnglish
Article number9515
Pages (from-to)434-439
Number of pages6
JournalFuel
Volume160
DOIs
Publication statusPublished - 2015 Aug 17

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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