Abstract

This article presents the results of study of dibenzothiophene (DBT, the fuel equivalence ratio \(\varphi = 0.94\)–1.01) oxidation in a medium of dense water vapor or argon at uniform heating (1 K/min) to 853 K of a tubular reactor made of stainless steel. The oxidation of DBT was found to proceed by the mechanisms of heterogeneous and homogeneous reactions. From the dynamics of the temperature of the reaction mixtures it follows that self-ignition of DBT in an environment of water vapor and argon occurs at 532 K. A Pt-Rh/Pt thermocouple introduced into the center of the reaction volume was found to have a catalytic effect on DBT oxidation. The results of mass spectrometry analysis of gas products show that the degree of carbon burnout exceeds 95% mol. The interaction of stainless steel and H\(_{2}\)SO\(_{4}\) formed in the DBT oxidation in water vapor causes steel corrosion, which is suppressed due to neutralization of the acid by calcium carbonate. The composition of the corrosion products was determined by the X-ray diffraction and energy-dispersive analysis methods.

中文翻译：

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高压下水蒸气和氩气中二苯并噻吩的氧化

摘要

本文介绍了在浓水蒸气或氩气介质中均匀加热（1 K / min）至853 K的二苯并噻吩（DBT，燃料当量比\（\ varphi = 0.94 \）– 1.01）氧化的研究结果。由不锈钢制成的管式反应器。发现DBT的氧化是通过异质和均相反应的机理进行的。根据反应混合物温度的动态变化，可以得出DBT在水蒸气和氩气环境中的自燃在532 K下发生。发现引入反应体积中心的Pt-Rh / Pt热电偶具有对DBT氧化的催化作用。气体产物的质谱分析结果表明，碳燃尽程度超过95％mol。不锈钢与H的相互作用在水蒸气中DBT氧化过程中形成的\（_ {2} \） SO \（_ {4} \）导致钢腐蚀，由于碳酸钙对酸的中和作用而被抑制。腐蚀产物的组成通过X射线衍射和能量色散分析方法确定。