JV Task 28 - Pilot-Scale Evaluation of the Impact of Selective Catalytic Reduction for NO(x) on Mercury Speciation.

Laudal, D. L. ; Pavlish, J. H. ; Galbreath, K. C. ; Thompson, J. S. ; Weber, G. F. ; Sondreal, E.

Technical Information Center Oak Ridge Tennessee

关键词: Catalytic reduction;    Nitrous oxides;    Impacts;    Ammonia;    Bituminous coal;   

RP-ID  :  DE2004824958

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Full-scale tests in Europe and bench-scale tests in the United States have indicated that the catalyst, normally vanadium/titanium metal oxide, used in the selective catalytic reduction (SCR) of NO(sub x), may promote the formation of Hg(sup 2+) and/or particulate-bound mercury (Hg(sub p)). To investigate the impact of SCR on mercury speciation, pilot-scale screening tests were conducted at the Energy& Environmental Research Center. The primary research goal was to determine whether the catalyst or the injection of ammonia in a representative SCR system promotes the conversion of Hg(sup 0) to Hg(sup 2+) and/or Hg(sub p) and, if so, which coal types and parameters (e.g., rank and chemical composition) affect the degree of conversion. Four different coals, three eastern bituminous coals and a Powder River Basin (PRB) subbituminous coal, were tested. Three tests were conducted for each coal: (1) baseline, (2) NH(sub 3) injection, and (3) SCR of NO(sub x). Speciated mercury, ammonia slip, SO(sub 3), and chloride measurements were made to determine the effect the SCR reactor had on mercury speciation.