Effects of pyrolysis parameters on physicochemical properties of biochar and bio-oil and application in asphalt

Authors

Xinxing Zhou, Key Laboratory of Highway Construction and Maintenance Technology in Loess Region, Shanxi Transportation Technology Research & Development Co., Ltd., Taiyuan 030032, China; State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China. Electronic address: zxx09432338@whut.edu.cn.
Taher Baghaee Moghaddam, Department of Civil and Environmental Engineering, University of Waterloo, Ontario N2L 3G1, Canada.
Meizhu Chen, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
Shaopeng Wu, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
Yuan Zhang, Department of Civil & Environmental Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
Xiaorui Zhang, School of Transportation, Southeast University, Nanjing 211189, China.
Sanjeev Adhikari, Kennesaw State University, 1100 South Marietta Parkway, Marietta, GA 30060, USA.
Xiao Zhang, College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China. Electronic address: zhangxiao01@tyut.edu.cn.

Department

Construction Management

Document Type

Article

Publication Date

8-1-2021

Abstract

Adoption of renewable energy sources such as biomass has been increasing worldwide. In this study, fast pyrolysis as an acceptable and viable method to get renewable bio-oil and biochar is used. Different temperatures and N flow velocities were used in the fast pyrolysis process to evaluate the pyrolysis yield of biochar and bio-oil. The waste wood and pig manure were utilized to prepare biochar and bio-oil. X-ray fluorescence, X-ray diffraction, high-pressure liquid chromatograph, Micro confocal laser Raman spectrometer, Fourier transform infrared spectrometer, and dynamic shear rheometer were used to measure the chemical compositions, structure, and pyrolysis yield of biochar and bio-oil. The obtained results indicate that pyrolysis temperature increases the purity of inorganic oxide in biochar and N flow velocity promotes the yield of carbon in biochar. The increase of N flow velocity would increase the acid property of bio-oil and damage the products yield of bio-oil. It was also observed that biochar could remarkably alter the fundamental performances of petroleum asphalt including penetration, softening point, ductility, viscosity, and complex modulus. The most important is that the upgraded bio-oil can be used to replace partly or fully the petroleum asphalt which is a promising biomass application.

Journal Title

The Science of the total environment

Volume

780

First Page

146448

Digital Object Identifier (DOI)

10.1016/j.scitotenv.2021.146448