Oil sludge (OS) is a typical dangerous waste in petroleum industry, which also contains abundant energy. The purpose of this study was to recover resources from OS gasification. To figure out the gasification process, a thermal analyzer was used to carry out OS gasification experiments under steam/nitrogen atmosphere with different heating rates. Results showed that the OS gasification reaction could be divided into five stages: free water volatilization, the escape of light components, the cracking of heavy components and steam reforming, the charring process and water gas shift (WGS) reactions, and inorganic mineral decomposition. The activation energy (E), pre‐exponential factor (A), enthalpy change (ΔH), Gibbs free energy change (ΔG), and entropy change (ΔS) of three main reaction stages (Stages 2–4) were analyzed through kinetic and thermodynamic analysis. From Stage 2 to Stage 4, E, ΔH, and ΔS decreased from 118.80 kJ·mol⁻¹, 113.92 kJ·mol⁻¹, and −4.09 J·(K mol)⁻¹ to 13.19 kJ·mol⁻¹, 5.92 kJ·mol⁻¹, and −234.06 J·(K mol)⁻¹, respectively. Nevertheless, ΔG increased from 116.01 to 210.04 kJ·mol⁻¹. From these parameters, it could be found that the decrease of E was beneficial to the reaction. However, the values of ΔG were always positive and the reaction could not happen spontaneously.

中文翻译：

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污泥气化动力学特性的实验研究

油泥（OS）是石油工业中的典型危险废物，也含有丰富的能量。这项研究的目的是从OS气化中回收资源。为了确定气化过程，使用热分析仪在蒸汽/氮气气氛下以不同的加热速率进行OS气化实验。结果表明，OS气化反应可分为五个阶段：自由水挥发，轻组分逸出，重组分裂解和蒸汽重整，炭化过程和水煤气变换（WGS）反应以及无机矿物分解。活化能（E），指数前因子（A），焓变（ΔH），吉布斯自由能变化（ΔG），并通过动力学和热力学分析来分析三个主要反应阶段（阶段2-4）的熵变（ΔS）。从阶段2到阶段4，ë，Δ ħ，和Δ小号从118.80千焦耳下降·摩尔^-1，113.92千焦·摩尔^-1，和-4.09·J·（K摩尔）^-1至13.19千焦·摩尔^-1，分别为5.92 kJ·mol ^-1和-234.06 J·（K mol）^-1。然而，ΔG从116.01增加到210.04kJ·mol ^-1。从这些参数可以发现，E的减少对反应是有益的。但是，ΔG的值 总是积极的，反应不可能自发地发生。