纤维素热解（空气中）怎么会产生甲醇？

次甲基氧化产物，强氧化环境也可以有甲醛

降低酿造酒中的甲醇含量文献Mutation breeding of Saccharomyces cerevisiae with lower methanol content and the effects of pectinase, cellulase and glycine in sugar cane spirits；Reduction of Methanol in Brewed Wine by the Use of Atmospheric and Room-Temperature Plasma Method and the Combination Optimization of Malt with Different Adjuncts，