Fast pyrolysis experiments of pine and corncob were conducted in the fluidized bed reactor with a feed rate of 1 kg/h, and bio-oils with different properties were obtained by spray condensation. Effect of condensing temperature on properties of bio-oils was investigated. The results of experiments showed that yields of bio-oils from pine and corncob were reduced by 23. 1% and 20. 8% respectively, and water contents were also decreased by 11% and 18% respectively, while viscosities went up by 181 cSt and 10 cSt respectively, and heat values also increased by 6. 23 MJ/kg and 5. 04 MJ/kg respectively when condensing temperature rose from 25 ℃ to 75 ℃ . The chemical compositions and structures of bio-oil werernanalyzed by gas chromatography/mass spectrometry ( GC/MS ) and nuclear magnetic resonance spectroscopy ( NMR). From the GC/MS spectra it was observed that the contents of anhydrosugar significantly increased in bio-oil from pine, while the contents of most light components decreased with the rise of condensing temperature. In bio-oil from corncob contents of anhydrosugars and phenols were both slightly enhanced, while contents of organic acids, aldehydes and ketones were reduced in bio-oil from corncob. The C spectra revealed that the content of alkyl carbon decreased, while the content of aromatic carbon increased in bio-oils with the rise of condensing temperature, and thus aromaticity of bio-oil was raised.%在1 kg/h的流化床热解反应器上进行松木和玉米芯的热解试验,采用喷淋冷凝的方式获得不同性质的生物油,重点考察冷凝温度对生物油理化性质的影响.试验结果表明当冷凝温度从25℃提高到75℃,松木和玉米芯热解产生的生物油收集率分别降低了23.1％和20.8％,含水率分别降低了11％和18％,而粘度分别提高了181 cSt和10 cSt,热值分别提高了6.23 MJ/kg和5.04 MJ/kg；气相色谱质谱联用分析(气质联用)表明随着冷凝温度的提高,松木热解产生的生物油中脱水糖含量大幅提高,大部分轻质组分含量降低,而玉米芯热解产生的生物油中脱水糖和酚类物质含量都有所提高,有机酸和醛酮类化合物含量降低；核磁共振碳谱分析发现提高冷凝温度后生物油中的烷基碳含量降低,而芳香碳含量提高,芳香度增大.
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