Study on safe disposal of cephalosporins based on kinetic pyrolysis mechanism

IF 0.7 4区工程技术 Q4 CHEMISTRY, APPLIED

Polish Journal of Chemical Technology Pub Date : 2024-01-11 DOI:10.2478/pjct-2023-0038

Jiangxue Fan, Meng Zhang, Xiaofei Hou, Fang Wang, Mengyuan Bai, Ruoxi Jiao, Zhongyu Yang, Erhong Duan, Fengfei Cheng, Wen Zhou

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Abstract

Based on the global goals for cleaner production and sustainable development, the pyrolysis behavior of cephalosporin residues was studied by TG-MS method. The influence of full temperature window on the safe disposal of residues was analyzed based on the “3-2-2” and “1+1” of thermal analysis kinetics, and the gas by-products of thermal degradation were monitored. Results showed that the pyrolysis of distillation residues were divided into low and high-temperature zones, including six stages. Maximum error rate (8.55%) by multiple scan rate was presented based on “3-2-2” pattern and maximum total fluctuation (33.7) by single scan rate was presented based on “1+1” pattern, which implied that the comprehensive multi-level comparison method was very reliable. The E value “E” of six stages showed an increasing trend ranging 166.8 to 872.8 kJ/mol. LgA (mean) was 27.28. Most mechanism function of stage 1, 2 were Z-L-T equation (3D), stage 3, 4, 6 were Avrami-Erofeev equation (AE3, AE4, AE2/3) and stage 5 was Reaction Order (O2). In addition, various small molecular micromolecule substances were detected such as C2H4O, C2H6, NH3, CH4, CO2 under full temperature windows and a possible pyrolysis path of residues was provided.

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基于动力学热解机制的头孢菌素安全处置研究

基于清洁生产和可持续发展的全球目标，采用TG-MS方法研究了头孢菌素残留物的热解行为。根据热分析动力学的 "3-2-2 "和 "1+1"，分析了全温度窗对残留物安全处置的影响，并监测了热降解的气体副产物。结果表明，蒸馏残渣的热解分为低温区和高温区，包括六个阶段。基于 "3-2-2 "模式的多重扫描速率呈现出最大误差率（8.55%），基于 "1+1 "模式的单一扫描速率呈现出最大总波动（33.7），这意味着多级综合比较方法非常可靠。六个阶段的 E 值 "E "在 166.8 至 872.8 kJ/mol 之间呈上升趋势。LgA（平均值）为 27.28。第 1、2 阶段的大部分机理函数为 Z-L-T 方程（3D），第 3、4、6 阶段为阿夫拉米-埃罗费耶夫方程（AE3、AE4、AE2/3），第 5 阶段为反应顺序（O2）。此外，还在全温度窗口下检测到各种小分子微分子物质，如 C2H4O、C2H6、NH3、CH4、CO2，并提供了残留物可能的热解路径。

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来源期刊

Polish Journal of Chemical Technology CHEMISTRY, APPLIED-ENGINEERING, CHEMICAL

CiteScore

1.70

自引率

10.00%

发文量

审稿时长

4.5 months

期刊介绍： Polish Journal of Chemical Technology is a peer-reviewed, international journal devoted to fundamental and applied chemistry, as well as chemical engineering and biotechnology research. It has a very broad scope but favors interdisciplinary research that bring chemical technology together with other disciplines. All authors receive very fast and comprehensive peer-review. Additionally, every published article is promoted to researchers working in the same field.