Thermogravimetric characteristics and combustion emissions of rubbers and polyvinyl chloride in N₂/O₂ and CO₂/O₂ atmospheres

Tang, YuTing; Ma, XiaoQian; Lai, ZhiYi; Zhou, DaoXi; Chen, Yong

Thermogravimetric characteristics and combustion emissions of rubbers and polyvinyl chloride in N₂/O₂ and CO₂/O₂ atmospheres

2013

Tang, YuTing | Ma, XiaoQian | Lai, ZhiYi | Zhou, DaoXi | Chen, Yong

The thermogravimetric characteristics of tire rubber (TR), rubber mattress (RM) and polyvinyl chloride (PVC), representing the rubber and plastic materials of municipal solid waste (MSW) were compared under 80N₂/20O₂ and 80CO₂/20O₂ atmospheres. Replacement of N₂ by CO₂ reduced the weight loss rate of most peaks below 600°C, postponed the location of the peaks above 600°C, and resulted in less complete burnout, which indicated the combustion in CO₂/O₂ atmosphere decreased the reactivity of the samples. The emissions of TR, RM and PVC combustion in a tube reactor were analyzed by a flue gas analyzer. The concentrations of CO, H₂, SO₂ and NOₓ all increased initially and decreased afterwards along with the heating time. During 800–1000°C, NOₓ and SO₂ emissions of all samples increased by the temperature, and decreased by the replacement of N₂ by CO₂. In both atmospheres, the subsequence of the NOₓ emission was TR>RM>PVC, and the subsequence of the SO₂ emission was TR>PVC>RM. The effects of temperature and atmosphere on the CO and H₂ emissions of two rubbers were different from those of PVC.

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