Pb, Cu, Zn, Mn, and Cr were removed from municipal solid waste fly ash through chloride volatilization method using poly(vinyl chloride) (PVC) as the chlorinating agent. To investigate the effective utilization of PVC, chloride volatilization at 700–900 °C was conducted for 0–120 min under three conditions: elevated heating (~ 40 °C/min), isothermal heating, and isothermal heating with Ca(OH)₂ as a HCl trapping agent. PVC was a better chlorinating agent than CaCl₂ and removed ~ 100% Pb and Zn and ~ 50% Cu and Mn by isothermal heating at 900 °C for 120 min. Ca(OH)₂ reduced Pb removal at 700 °C by ~ 20% and Cu removal at 900 °C by ~ 50%; however, it promoted Zn volatilization by 10–20% at all temperatures. The effects of co-existing elements on the chloride volatilization behaviors of these heavy metals were determined by conducting thermodynamic simulations under equilibrium conditions. The combined experimental and thermodynamic approach suggested that Pb and Zn were mainly volatilized as metal chlorides via reaction with the HCl produced by PVC pyrolysis, whereas Mn was volatilized by both CaCl₂ and Na₂O. Thus, CaO, CaCO₃, MgO, and residual carbon in fly ash could inhibit the chlorination of Pb, Cu, and Cr.

使用聚氯乙烯（PVC）作为氯化剂，通过氯化物挥发法从城市固体垃圾飞灰中去除了铅，铜，锌，锰和铬。为了研究PVC的有效利用，在以下三种条件下，进行了700-900°C的氯化物挥发0-120分钟：升高的加热温度（〜40°C / min），等温加热和Ca（OH）₂等温加热作为HCl捕集剂。PVC是比CaCl ₂更好的氯化剂，并且通过在900°C下等温加热120分钟除去了〜100％的Pb和Zn以及〜50％的Cu和Mn。钙（OH）₂在700°C下将Pb去除率降低了约20％，在900°C下将Cu去除率降低了〜50％；然而，它在所有温度下都促进了Zn挥发10-20％。通过在平衡条件下进行热力学模拟，确定了共存元素对这些重金属氯化物挥发行为的影响。实验和热力学相结合的方法表明，Pb和Zn主要通过与PVC热解产生的HCl反应而作为金属氯化物挥发，而Mn被CaCl ₂和Na ₂ O挥发。因此，CaO，CaCO ₃，MgO和粉煤灰中残留的碳可以抑制Pb，Cu和Cr的氯化。