Mercury emissions to the atmosphere from natural gas burning in Brazil

Química Nova

Marins, Rozane Valente¹  Lacerda, Luiz Drude de¹  Santos, Angelo Francisco dos¹  Universidade Federal Fluminense, Niterói¹  Petrobrás Gás & Energia, Rio de Janeiro, Brasil¹  Universidade Federal do Ceará, Fortaleza, Brasil¹ 

关键词: mercury;    natural gas;    atmospheric emissions.;   

DOI  :  10.1590/S0100-40422007000200024

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Increasing natural gas use in Brazil triggered a discussion of its role as a Hg source. We show that Hg emissions to the atmosphere from fossil fuel combustion for power generation in Brazil contribute with 6.2% (4.2 t yr-1) to the total anthropogenic Hg atmospheric emissions, with coal combustion and biomass burning as major sources. Natural gas contributes with 0.04 t yr-1, mostly from electricity generation (88%) and industrial uses (7.6%). Preliminary results on Hg concentrations in natural gas suggest that a large fraction of it is trapped during refining and transport, which may create Hg point sources between extraction and consumption.

【 授权许可】

Unknown