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| Pyrolysis characteristics of pork by thermogravimetry and fourier-transform infrared spectroscopy |
| Received:November 25, 2017 |
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| KeyWord:pyrolysis;pork;fat;protein;thermogravimetry analysis;fourier-transform infrared spectroscopy analysis |
| Author Name | Affiliation | E-mail | | ZHANG Yi-ke | State Key Lab of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China | | | MA Zeng-yi | State Key Lab of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China | mazy@zju.edu.cn | | YAN Jian-hua | State Key Lab of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China | |
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| Abstract: |
| In order to understand the pyrolysis of livestock carcass in rotary kiln, pork was selected as a typical carcass and its pyrolysis characteristics were studied by thermogravimetry and fourier-transform infrared spectroscopy. During pyrolysis, the evaporation of water was accompanied by the volatilization of small molecules, such as peptides, fatty acids, and esters. The activation energy of protein was 80.8 kJ·mol-1, and protein began to decompose at around 180℃. Protein decomposition was dominant during the low temperature stage (180~300℃) of pyrolysis. Further, the activation energy of fat was 206 kJ·mol-1, and it began to pyrolyze at 280℃. Fat was pyrolyzed the most during the high temperature stage (300~500℃) of pyrolysis. Significant differences were observed between the pyrolytic products of fat and protein. The main products during the pyrolysis of protein were inorganic gases, including carbon dioxide (CO2), ammonia (NH3) and hydrogen cyanide (HCN); and some organic compounds, such as amides, carboxylic acids, and aromatic hydrocarbons. The pyrolysis of fat produced high amounts of organic compounds, such as hydrocarbons, aldehydes, fatty acids, and aromatics. In addition, the interaction between fat and protein generated high amounts of amides, and it accelerated the pyrolysis process. The results of the present study will help the future designing of rotary kilns, and also provide information on the large-scale pyrolytic disposal of livestock carcass in the rotary kilns. |
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