Tailor made CuO/ZIF-8 hybrid structure as a potential candidate for thermocatalytic degradation of nitrocellulose

• Published in: Thermochimica acta Vol. 707; p. 179101
• Main Authors: Zhao, Ningning, Yu, Zhong, Wang, Jia, Ma, Haixia, Yao, Ergang, An, Ting, Zhao, Fengqi, Yu, Xiaojiao
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2022
• Subjects: activation energy; algorithms; catalysts; Catalytic activity; heat production; kinetics; Metal oxides/MOFs; Model reconstruction; pyrolysis; Pyrolysis mechanism; temperature; zero gravity; Model reconstruction; Catalytic activity; Metal oxides/MOFs; Pyrolysis mechanism
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/j.tca.2021.179101

•Catalytic effects of CuO/ZIF-8 on the thermolysis process of NC are first studied.•Pyrolysis behavior and kinetics of NC/catalyst complex were evaluated comparatively.•Catalytic activity of CuO/ZIF-8 is confirmed to be superior to that of CuO and ZIF-8. CuO/ZIF-8 hybrid structure was obtained by adding the PVP-modified foliaceous CuO microstructures during the preparation of ZIF-8 polygon particles as a promising candidate for promoting the thermolysis process of NC. Thermoanalysis and pyrolysis kinetics based on the DSC and TG/DTG data revealed that the CuO/ZIF-8-NC decomposition had a weightlessness rate of 77.81%, heat release of 2882.5 J⋅g–1, the exothermic peak temperature of 471.25 K, and activation energy of 172.2 ± 16.0 kJ⋅mol–1, indicating that CuO/ZIF-8 has better catalytic activity than CuO and ZIF-8. The reconstructed nth-order kinetic models for NC/catalysis complexes were obtained using a modified fitting algorithm based on the results of isoconversional kinetic analysis, indicating that CuO/ZIF-8, CuO, and ZIF-8 had different catalytic effects on the thermolysis pathways of NC. This study suggests that CuO/ZIF-8 composite may have prospective application as a high potential and unique catalyst for accelerating NC pyrolysis. [Display omitted]