Research on the 9,10-dihyroanthrancene assisted catalytic pyrolysis of pine over nitrogen-doped activated carbon for preparation of alkoxyphenols

In this study, nitrogen-doped activated carbon (NAC) was prepared from walnut shell and applied to the catalytic pyrolysis of pine for selective preparation of alkoxyphenols with 9,10-dihyroanthrancene (DHA) as the hydrogen donor. The effects of the mass fraction of ammonia solution on the physicochemical properties of NAC were investigated. The regulatory functions of DHA/pine ratio, pyrolysis temperature, and NAC/pine ratio on the generation of alkoxyphenols were revealed. The results showed that the pore structure and active sites distribution of NAC could be improved by proper mass fraction of ammonia solution. The NAC prepared at mass fraction of ammonia solution of 15% was the best for the production of alkoxylphenols. The yield of alkoxylphenols reached its maximum value of 5.27% at DHA/pine ratio of 1, pyrolysis temperature of 550 ℃, and NAC/pine mass ratio of 3, which was much higher than that from catalytic pyrolysis of pure pine (1.74%).