Sample records for gaseous effluents

Sample records 1 - 2 shown.


Análise de compostos sulfurados em efluentes gasosos de refinaria de petróleo/ Analysis of sulfur compounds in petroleum refinery gaseous effluents

Afonso, Júlio Carlos; Pereira, Kátia da Silva

Resumo em inglês This work discusses an analytical procedure for analysis of sulfur compounds in treated petroleum refinery gaseous effluents using a sulfur chemiluminescence detector with dual plasma burner (SCD-DP). Calibration was accomplished by using standards and gaseous streams of known concentration of sulfur compounds. The response factors agree with the calibration table of ASTM standard D 5504 (2008). The detection range for sulfur compounds is in μg m-3. The analytical pr (mais) ocedure allowed the construction of a chromatographic chart of sulfur compounds present in several refinery gaseous effluents. SO2 was the most difficult compound to be determined because of its high reactivity.

Scientific Electronic Library Online (Portuguese)


Gerenciamento de resíduos químicos e águas servidas no laboratório de isótopos estáveis do CENA/USP/ Chemistry waste and residues waters management at the stable isotope laboratory of the CENA/USP

Bendassolli, José Albertino; Máximo, Everaldo; Tavares, Glauco Arnold; Ignoto, Raquel de Fátima

Resumo em inglês A system for disposal and recovery of the main effluents and chemical waist from isotope separation plants and enriched compounds-15N and 34S production has been carried out at the Stable Isotope Laboratory (LIE) of the CENA/USP. Around four hundred thousand liters of effluents has been recovered yearly. Among the recovered chemical wastes, the more relevant are: ammonia; brome; ammonium and sodium sulfate; sodium hydroxide; sulfur dioxide; and hydrochloric acid. Chemical (mais) wastes containg recoverable heavy metals (Ag, Cr and Cu) and solvents (methanol, ethanol and acetone) are processed and recovered. Gaseous emissions, mainly H2S are used for recovery of heavy metals solutions. The minimization of the residues waters, as well the reduction of electric energy consume was established using a water deionization system. A cost/effect balance of the process is reported.

Scientific Electronic Library Online (Portuguese)