Development of quantitative C NMR characterization and simulation of C, H, and O content for pyrolysis oils based on C NMR analysis.

Bio-oil is a valuable liquid product obtained from pyrolysis of biomass and it contains tens of hundreds of compounds, which brings about difficulties for characterization with various analytical methods. C NMR has advantages over other detection methods as it can characterize the entire composition of bio-oil and distinguish different types of carbon. But various shortcomings limit the application of C NMR.

In-depth study on the effect of oxygen-containing functional groups in pyrolysis oil by P-31 NMR.

One of the major obstacles to the widespread use of pyrolysis oil is its high oxygen content, with oxygen atoms being mainly present in the hydroxyl and the carboxyl groups. Therefore, quantitative and accurate characterization of oxygen-containing functional groups is of great significance. This study employed P NMR to conduct in-depth studies on several model compounds including four kinds of alcohols and carboxylic acids.