中国农业科技导报2025，Vol.27Issue(2)：211-217,7.DOI:10.13304/j.nykjdb.2024.0453
热解温度及时间对生物炭理化性质及吸附性能的影响
Effects of Pyrolysis Temperature and Time on Physicochemical Properties and Adsorption Properties of Biochar
摘要
Abstract
In order to explore the response of physicochemical properties and adsorption properties of biochar to pyrolysis temperature and time,and clarify the appropriate time for preparing biochar at different pyrolysis temperatures,the garden waste branches were used as raw materials,and 5 pyrolysis times(12,24,36,48,60 min)were set at conventional pyrolysis temperatures of 450 and 650℃.The effects of pyrolysis time on biochar yield,pH,ash content,aromaticity,hydrophilicity,polarity and iodine adsorption value at different pyrolysis temperatures were analyzed.The results showed that the yield of biochar decreased with the increase of pyrolysis time.At 450℃,compared with 12 min pyrolysis treatment,the yield of biochar decreased significantly under 24,36,48 and 60 min pyrolysis treatments,but there was no significant difference among these treatments,and the above changes were consistent with those at 650℃.With the increase of pyrolysis time,the pH,ash content and aromaticity of biochar increased continuously,while the hydrophilicity and polarity decreased continuously.At 450℃,there was little or no significant difference in each index under 48 and 60 min pyrolysis treatments.At 650℃,there was no significant difference in pH of biochar under 24,36,48 and 60 min pyrolysis treatments,and there was no significant change in ash content,aromaticity,hydrophilicity and polarity of biochar under 36,48 and 60 min pyrolysis treatments.With the increase of pyrolysis time,the iodine adsorption value of biochar increased continuously.At 450℃,the iodine adsorption value of biochar was the largest under 48 and 60 min pyrolysis treatments,which was higher than other treatments.At 650℃for 36,48 and 60 min pyrolysis,the pyrolysis time had no significant effect on the iodine adsorption value of biochar.Based on the changes of physical and chemical properties and adsorption properties of biochar,the pyrolysis time required for the preparation of biochar at 450℃should not be less than 48 min,and the pyrolysis time at 650℃should not be less than 36 min.Above the time value,the effect of pyrolysis time on the properties and functions of biochar should be significantly reduced.关键词
生物炭/热解温度/热解时间/理化性质/吸附性能Key words
biochar/pyrolysis temperature/pyrolysis time/physicochemical properties/adsorption properties分类
农业科技引用本文复制引用
吕志伟,李冬梅,金梅娟,张燕辉,陶玥玥,周新伟,王海候..热解温度及时间对生物炭理化性质及吸附性能的影响[J].中国农业科技导报,2025,27(2):211-217,7.基金项目
江苏省农业科技自主创新资金项目-江苏现代农业产业单项技术研发项目(CX(22)3126) （CX(22）
苏州市农业科学院科研基金项目(23028) （23028）
苏州市姑苏乡土人才培养计划科研项目(22037). （22037）
