TY - JOUR
T1 - Two-Stage Chemical Absorption-Biological Reduction System for NO Removal
T2 - Model Development and Footprint Estimation
AU - Zhao, Jingkai
AU - Zhang, Chunyan
AU - Li, Meifang
AU - Li, Sujing
AU - Li, Wei
AU - Zhang, Shihan
N1 - This work was sponsored by the National Natural Science Foundation of China (nos. 21276233 and 21306166) and the National Key Technology R&D Program of China (2015BAD21B02).
PY - 2017/8/17
Y1 - 2017/8/17
N2 - The two-stage chemical absorption-biological reduction (CABR) system, comprised of an absorption column and a bioreactor, is regarded as a promising option for NO removal from the middle- and small-sized boilers. In this work, a steady-state rate-based model was developed for the two-stage CABR system. The developed model was validated by the data obtained from a laboratory two-stage CABR setup and then used for the estimation of the footprints for treating a 5 × 104 m3 h-1 flue gas from a 14 MW coal-fired steam boiler. For a baseline case (L/G = 10 L m-3, Cin,NO = 350 ppm, Cin,O2 = 6% (v/v)), the designed absorption column size was 3.60 x 8.75 m (d x h), while the bioreduction column was set at 3.60 x 8.50 m (d x h). Furthermore, sensitive analysis including the influence of gas concentrations, packing properties, and microorganism activities was investigated to optimize the design and operation of two-stage CABR process. Under optimized conditions, the footprint of the bioreactor can be downsized by 22.74%. It is believed that this work can provide fundamental data for the industrial application of the two-stage CABR system in the middle- and small-sized boilers.
AB - The two-stage chemical absorption-biological reduction (CABR) system, comprised of an absorption column and a bioreactor, is regarded as a promising option for NO removal from the middle- and small-sized boilers. In this work, a steady-state rate-based model was developed for the two-stage CABR system. The developed model was validated by the data obtained from a laboratory two-stage CABR setup and then used for the estimation of the footprints for treating a 5 × 104 m3 h-1 flue gas from a 14 MW coal-fired steam boiler. For a baseline case (L/G = 10 L m-3, Cin,NO = 350 ppm, Cin,O2 = 6% (v/v)), the designed absorption column size was 3.60 x 8.75 m (d x h), while the bioreduction column was set at 3.60 x 8.50 m (d x h). Furthermore, sensitive analysis including the influence of gas concentrations, packing properties, and microorganism activities was investigated to optimize the design and operation of two-stage CABR process. Under optimized conditions, the footprint of the bioreactor can be downsized by 22.74%. It is believed that this work can provide fundamental data for the industrial application of the two-stage CABR system in the middle- and small-sized boilers.
UR - http://www.scopus.com/inward/record.url?scp=85027887079&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85027887079&partnerID=8YFLogxK
U2 - 10.1021/acs.energyfuels.7b01620
DO - 10.1021/acs.energyfuels.7b01620
M3 - Article
AN - SCOPUS:85027887079
SN - 0887-0624
VL - 31
SP - 8454
EP - 8461
JO - Energy and Fuels
JF - Energy and Fuels
IS - 8
ER -