真空热解工艺参数对生物油产率的影响研究

doi:10.3969/j.issn.0253-2417.2014.01.013

Abstract

Abstract: Rape straw was treated by vacuum pyrolysis for bio-oil preparation. The pyrolysis temperature, system pressure, heating rate and holding time were chosen as input factors, the bio-oil yield as the output. The response surface methodology (RSM) was employed for the optimization of bio-oil yield based on single factor tests. The Design Expert 8.0.6 software was used to build a second order quadratic equation. The optimal conditions were obtained by using the equation. In addition, confirmation experiments were conducted. The results showed that the pyrolysis temperature, system pressure, heating rate were the main factors for the bio-oil yield, while the holding time was the second factor. Optimal conditions were obtained at pyrolysis temperature of 494.0 ℃, system pressure of 5.0 kPa, heating rate of 18.4 ℃/min and holding time of 60.0 min. Confirmation runs gave 43.50 % of bio-oil yield, which is comparable to 43.63 % of predicted value.

Key words: biomass, vacuum pyrolysis, bio-oil yield, response surface methodology (RSM)

CLC Number:

TQ35

FAN Yong-sheng, CAI Yi-xi, LI Xiao-hua, ZHAO Wei-dong, YU Ning. Influence of Process Parameters on Bio-oil Yield by Vacuum Pyrolysis[J]. Chemistry and Industry of Forest Products, 2014, 34(1): 79-85.

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Influence of Process Parameters on Bio-oil Yield by Vacuum Pyrolysis

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