SELF-POWER PROPERTY OF PYROLYSIS OF KITCHEN WASTE: AN INVESTIGATION ON THE MASS AND ENERGY FLOW

HOU Lintong; YANG Xuezhong; LI Jian; YAN Beibei; CHEN Guanyi

doi:10.13205/j.hjgc.202212006

Volume 40 Issue 12

Nov. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(12): 37-45

HOU Lintong, YANG Xuezhong, LI Jian, YAN Beibei, CHEN Guanyi. SELF-POWER PROPERTY OF PYROLYSIS OF KITCHEN WASTE: AN INVESTIGATION ON THE MASS AND ENERGY FLOW[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 37-45. doi: 10.13205/j.hjgc.202212006

Citation:

HOU Lintong, YANG Xuezhong, LI Jian, YAN Beibei, CHEN Guanyi. SELF-POWER PROPERTY OF PYROLYSIS OF KITCHEN WASTE: AN INVESTIGATION ON THE MASS AND ENERGY FLOW[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 37-45. doi: 10.13205/j.hjgc.202212006

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SELF-POWER PROPERTY OF PYROLYSIS OF KITCHEN WASTE: AN INVESTIGATION ON THE MASS AND ENERGY FLOW

doi: 10.13205/j.hjgc.202212006

1. School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China;
2. School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China

Received Date: 2022-07-27
Available Online: 2023-03-23

Abstract

Abstract

Food waste has a complex composition and high moisture content. Although the pyrolysis process can achieve fast, harmless reduction and energy reuse of food waste, the process highly relies on external energy input. Thus the mass and energy evaluation for the pyrolysis process is very important. In this work, the mass distribution and energy flow for the pyrolysis of food waste were comprehensively investigated. We tried to achieve self-powered prolysis by burning the pyrolytic products. The pyrolysis experiments were conducted in a lab-scale fixed-bed reactor, and the influence of moisture on food waste and pyrolysis temperature was investigated. Moreover, based on the results of TG-DSC, an index (ERPC) was built for evaluating the potential of self-power. Results showed that when the temperature increased from 400 ℃ to 800 ℃, the solid product of pyrolysis decreased while the gaseous product increased. The liquid product increased firstly then decrease, and peaked at 500 ℃. Based on the analysis of the heating value of the products, the high pyrolysis temperature and moisture content weakened energy production. If all of the pyrolysis products (gas, oil and char) were burned, the moisture content of food waste should be lower than 40% for achieving self-power, and the pyrolysis temperature should be lower than 500 ℃. If only burning gas and oil products, the pyrolysis temperature should be lower than 600 ℃, and the moisture content lower than 10%. However, self-power can never be achieved under any conditions, if only burning prolysis gas.
- food waste,
- pyrolysis characteristics,
- combustion,
- self-power

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References(29)

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