Open AccessAdvanced separation technology for flue gas cleanup. Quarterly technical report No. 14
Author(s) -
Abhoyjit S. Bhown,
N. Pakala,
T. Riggs,
T. Tagg,
K. K. Kirkar,
S. Majumdar,
D. Bhaumick
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/225025
Subject(s) - data scrubbing , flue gas , desorption , absorption (acoustics) , process engineering , chemistry , waste management , work (physics) , analytical chemistry (journal) , materials science , adsorption , engineering , mechanical engineering , environmental chemistry , organic chemistry , composite material
The objective of this work is to develop a novel system for regenerable SO{sub 2} and NO{sub x} scrubbing of flue gas that focuses on (a) a novel method for regeneration of spent SO{sub 2} scrubbing liquor and (b) novel chemistry for reversible absorption of NO{sub x}. In addition, high efficiency hollow fiber contactors (HFC) are proposed as the devices for scrubbing the SO{sub 2} and NO{sub x} from the flue gas. The system will be designed to remove more than 95% of the SO{sub x} and more than 75% of the NO{sub x} from flue gases typical of pulverized coal-fired power plants at a cost that is at least 20% less than combined wet limestone scrubbing of SO{sub x} and selective catalytic reduction NO{sub x}. In addition, the process will make only marketable byproducts, if any (no waste streams). During the third quarter of 1995, we continued work on Task 8, integrated NO{sub x} life tests. We also obtained some mass transfer data on Task 9, performance of scalable modules. In Task 8, we gathered additional 400 hours of NO{sub x} absorption/desorption data. We also presented the data on NO{sub x} absorption/desorption behavior over cumulative time to date. the performance indicates unchanged reversible characteristics of Co(II) phthalocyanine solution. Therefore, we believe that NO{sub x} absorption/desorption chemistry is robust. In Task 9, we experimentally observed the channeling of liquid flow due to poor design of previous rectangular modules. Newly obtained welded rectangular modules out-performed previous modules. We also presented SO{sub 2} absorption data using different Na{sub 2}SO{sub 3} concentrations. The SO{sub 2} absorption seem to be dependent on liquid flow rate, a rather surprising result compared to earlier results. Apparatus for combined absorption/desorption of SO{sub 2} in rectangular modules is also given in this report