Mercury emissions to the atmosphere from natural gas burning in Brazil

Quimica nova

Marins, Rozane Valente²  Lacerda, Luiz Drude de³  Santos, Angelo Francisco dos⁴ 

[1] Energia, Rio de Janeiro, Brasil;Petrobrás Gás &Universidade Federal Fluminense, Niterói;Universidade Federal do Ceará, Fortaleza, Brasil;amp

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

【 授权许可】

CC BY