Study on safe disposal of cephalosporins based on kinetic pyrolysis mechanism
Author:
Fan Jiangxue12, Zhang Meng12, Hou Xiaofei12, Wang Fang12, Bai Mengyuan12, Jiao Ruoxi12, Yang Zhongyu12, Duan Erhong12, Cheng Fengfei3, Zhou Wen4
Affiliation:
1. School of Environmental Science and Engineering , Hebei University of Science and Technology , Shijiazhuang, Hebei 050018, PR China 2. National and Local Joint Engineering Center of Volatile Organic Compounds & Odorous Pollution Control Technology , Shijiazhuang, Hebei 050018, PR China 3. Hebei provincial pollutant emission rights trading service center , Shijiazhuang, Hebei 050000, PR China 4. The State Grid Hebei Electric Power Company Electric Power Research Institute , Shijiazhuang, Hebei, 050021, PR China
Abstract
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.
Publisher
Walter de Gruyter GmbH
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