The pyrolysis behavior of cattle manure was analyzed by three methods in this work: thermogravimetric analyzer (TG), Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and pyrolysis photoionization time-of-light mass spectrometry (Py−PI−TOFMS). The pyrolysis process of cattle manure could be divided into four stages, dehydration stage, lignocellulose decomposition stage, lignin and protein decomposition stage, char and mineral matter decomposition stage. The products was mainly classified into six groups: ketones, aldehydes, phenolic compounds, acids, hydrocarbons and N-containing compounds. Based on the time-evolved profiles and temperature-evolved profiles, the characteristics of these major products were analyzed and discussed. Furthermore, their possible formation pathways were also proposed and discussed.
Keywords Cattle manure, Pyrolysis, Products analysis, TG, GC-MS, PI-TOFMS