Biochar surface functional groups as affected by biomass feedstock, biochar composition and pyrolysis temperature

作     者：Rainer Janu Verena Mrlik Doris Ribitsch Jakub Hofman Petr Sedlácek Lucie Bielsk Gerhard Soja 

作者机构：AIT Austrian Institute of Technology GmbHKonrad Lorenz-Str.243430 TullnAustria University of Natural Resources and Life SciencesInstitute of Environmental BiotechnologyKonrad Lorenz-Str.203430 TullnAustria Masaryk UniversityFaculty of ScienceRECETOXKamenice 753/562500 BrnoCzech Republic Brno University of TechnologyMaterials Research CentrePurkyňova 464/11861200 BrnoCzech Republic University of Natural Resources and Life SciencesInstitute for Chemical and Energy EngineeringMuthgasse 1071190 WienAustria 

出 版 物：《Carbon Resources Conversion》 (碳资源转化（英文）)

年 卷 期：2021年第4卷第1期

页      面：36-46页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：financial support by the Austrian FWF(Austrian Science Fund),Project Nr.I 3133-N34 by the Czech Science Foundation(GF17-33820L) 

主　　题：FTIR DRIFTS Spectroscopy Characterization Carbonization 

摘      要：By testing 92 different biochars,this study had the objective to determine the relations between simple physico-chemical characteristics of biochar(elemental composition,ash fraction,specific surface area,process parameters)and infrared sorption characteristics revealing the presence of specific functional *** results of Diffusive Reflection Fourier Transformation Infrared Spectroscopy were statistically analyzed with multiple linear regression techniques and Principal Component Analysis(PCA)with the biochar characterization parameters as model *** dominant parameters affecting the functional group signals were the pyrolysis temperature,the H/C-ratio and specific surface area of the biochar and the ash *** models were able to explain 60-90%of data variance for specific peaks in the *** application of PCA could further reduce the input parameters to three main factors explaining 70.8%of total data *** of the first two main factors showed the similarity of infrared spectra of biochars produced at 300 and 450℃,whereas a pyrolysis temperature of 600℃ lead to a partial and a 750℃ to a nearly complete loss of biochar surface functional groups.