Dioxin reduction by sulfur component addition

Evaluation of PCDD/Fs emission from fluidized bed incinerators co-firing MSW with coal in China

“…On the other hand, it has also been approved by Gullett et al that co-firing MSW with coal containing sulfur can reduce PCDD/F emissions considerably [3][4][5]. This phenomenon has also been supported by the archival PCDD/F literature [6,7] In this paper, the levels, homologue and congener distributions of PCDD/F emissions from flue gas of three FB incinerators which co-fire MSW and coal are determined. In the meantime, the difference between experimental results by two different resolution mass spectrometric methods is reported.…”

Effects of gaseous NH3 and SO2 on the concentration profiles of PCDD/F in flyash under post-combustion zone conditions

“…These reduction efficiencies are high compared to the results of a previous study conducted by Pekarek et al (2007), who reacted a homogenized mixture of dioxin-free flyash, NaCl, CuCl. According to several authors, SO 2 sulphonates the phenolic precursors which prevent chlorination and bi-aryl synthesis, and promote the formation of sulphur analogues of PCDD/F (Gullett et al, 1992, Ogawa et al, 1996. In addition, Ke et al, (2010) suggested that SO 2 can sulphonate the copper catalysts resulting in the suppression of organic chlorine (C-Cl) formation.…”

“…ii) Conversion of metal oxide/chloride catalyst to metal sulphates which show less catalytic activity, therefore reducing the catalytic activity of the 'Deacon Reaction'. and iii) SO 2 sulphonates the phenolic precursors which prevents chlorination and bi-aryl synthesis, and promotes the formation of sulphur analogues of PCDD/F (Ogawa et al, 1996Ryan et al, 2006;Ke at al., 2010). In addition, Addink et al (1996) showed that sulphur-based inhibitors were capable of changing the number of chlorine atoms built into PCDD/F molecules but not the position of chlorination.…”

Emissions Minimization of Chlorinated Micropollutants in Coal Solid Waste Co‐Combustion by Primary Measures

“…It has been found that increasing amount of sulfur reduces the formation of PCBz, especially the Cl 2 -and Cl 3 -isomers. In contrast, the formation of PCDD is preferred compared to that of PCDF due to their formation via different Dioxin reduction tests by sulfur component addition were carried out using small scale fluidised bed combustor system [96]. Dioxin reduction occurred for each test where gaseous SO 2 was added.…”