Co-gasification of meat and bone meal with coal in a fluidised bed reactor

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• 作者：E. Cascarosa ; ^a ; ^{ecascano@unizar.es"" rel=""nofollow} ; L. Gasco^a ; G. Gea^a ; J.L. Sá ; nchez^a ; J. Arauzo^a
• 关键词：Co-gasification ; Meat and bone meal ; Fluidised bed
• 刊名：Fuel
• 出版年：2011
• 出版时间：August 2011
• 年：2011
• 卷：90
• 期：8
• 页码：2798-2807
• 全文大小：919 K

文摘

After the Bovine Spongiform Encephalopathy illness appeared, the meat and bone meat (MBM) produced from animal residues became an important waste. In spite of being a possible fuel due to its heating value (around 21.4 MJ/kg), an important fraction of the meat and bone meal is being sent to landfills. The aim of this work is to evaluate the co-gasification of low percentages of meat and bone meal with coal in a fluidised bed reactor as a potential waste management alternative. The effect of the bed temperature (800–900 °C), the equivalence ratio (0.25–0.35) and the percentage of MBM in the solid fed (0–1 wt. % ) on the co-gasification product yields and properties is evaluated. The results show the addition of 1 wt. % of MBM in a coal gasification process increases the gas and the liquid yield and decreases the solid yield at 900 °C and 0.35 of temperature and equivalence ratio operational conditions. At operational conditions of 900 °C and equivalence ratio of 0.35, the specific yield to gas (y_gas) increases from 3.18 m³(STP)/kg to 4.47 m³(STP)/kg. The gas energy yield decreased 24.1 % and the lower heating value of the gas decreases from 3.36 MJ/m³(STP) to 2.16 MJ/m³(STP). The concentration of the main gas components (H₂, CO and CO₂) hardly varies with the addition of MBM, however the light hydrocarbon concentrations decrease and the H₂S concentration increases at the higher temperature (900 °C).