Regeneration of sulfated alumina support in CuO/{gamma}-Al{sub 2}O{sub 3} sorbent by hydrogen
- Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of)
Sulfur dioxide (SO{sub 2}) and nitrogen oxides (NO{sub x}) are major air pollutants which have to be removed before emitting flue gases to the atmosphere. Numerous processes have been developed to remove these pollutants and CuO/{gamma}-Al{sub 2}O{sub 3} sorbent is known to be one of the efficient methods to remove SO{sub 2}/NO{sub x}. The effects of regeneration temperature, degree of sulfation, and the number of sulfation-regeneration cycle on the regeneration of sulfated CuO/{gamma}-Al{sub 2}O{sub 3} sorbent have been determined. Sulfates on copper and alumina sites in the sorbent start to be removed by 5 vol % H{sub 2} flow above 300 and 400 C, respectively. From the nonisothermal reduction of the sulfates, the main component of the product gases is SO{sub 2}. The amount of residual sulfur compound decreases with increasing regeneration temperature up to 450 C, but it remains constant up to 500 C. The pore volume of the regenerated sorbent recovers almost to that of the fresh sorbent at a reduction temperature of 500 C. Sulfation activity of 8 wt % CuO/{gamma}-Al{sub 2}O{sub 3} sorbent decreases somewhat with the cycles up to 30 times due to degradation of the sorbent at 500 C. On the other hand, the 5 wt % NaCl promoted sorbent is maintained up to 30 cycles at 440 C without degradation of the sorbent.
- OSTI ID:
- 253753
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 5 Vol. 35; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enhancement of the SO{sub 2} sorption capacity of CuO/{gamma}-Al{sub 2}O{sub 3} sorbent by an alkali-salt promoter
Sol-gel-derived alumina-supported copper oxide sorbent for flue gas desulfurization