The reaction process of petrochemical sludge under hydrothermal conditions was investigated to explore the feasibility of its disposal using hydrothermal treatment. Experiments were conducted in an autoclave for 30 min at 350–450 °C. During the hydrothermal treat of petrochemical sludge, 44.98%–59.64% of the oil (organic matter) in the sludge was decomposed into aqueous and gas products. The gas yield reached 1.37 mol/kg of organic matter at reaction temperature of 450 °C. The H₂ yield was 0.26 mol/kg of organic matter. The primary product was still in the aqueous phase. The TOC concentration of the aqueous product was in the range of 14,960–19,050 mg/L. The concentration of COD, total phenol, and total nitrogen of product were in the ranges of 9029–10,870, 13.83–20.10, and 497.5–599.0 mg/L, respectively. The group analysis and GC-MS analysis of the residual oil indicated that the saturated long chain hydrocarbons (C18–C21) in petrochemical sludge had decomposed to form saturated short chain hydrocarbons (C11–C17); however, the short chain saturated hydrocarbons in the sludge had decomposed thoroughly. The removal rate of asphaltenes, resins and aromatic hydrocarbons were low. Finally, a mechanism for treating petrochemical sludge under hydrothermal conditions was proposed. The study provides an experimental basis for the hydrothermal treatment of petrochemical sludge.

研究了石油化学污泥在水热条件下的反应过程，探讨了利用水热处理处理污泥的可行性。实验是在350–450°C的高压釜中进行30分钟。在对石化污泥进行水热处理时，污泥中的油（有机物）的44.98％–59.64％被分解为水和气体产品。在450°C的反应温度下，气体产率达到1.37 mol / kg有机物。H ₂产率为0.26mol / kg有机物。初级产物仍处于水相中。水性产品的TOC浓度在14,960–19,050 mg / L的范围内。产品的化学需氧量，总酚和总氮浓度分别在9029–10,870、13.83–20.10和497.5–599.0 mg / L范围内。残油的组分析和GC-MS分析表明，石油化学污泥中的饱和长链碳氢化合物（C18-C21）已分解形成饱和短链碳氢化合物（C11-C17）。然而，污泥中的短链饱和碳氢化合物已被彻底分解。沥青质，树脂和芳烃的去除率低。最后，提出了一种在水热条件下处理石化污泥的机理。