Analysis of tar and pyrolysis gas from low-rank coal pyrolysis assisted by apple branch

Low-rank coal (LRC) pyrolysis assisted by biomass can realize the clean and efficient conversion utilization of LRC. The gas tar characteristics obtained from co-pyrolysis apple branch (AB) LRC at different stages were studied with TG-FTIR Py-GC/MS. It was found that process could be divided into four stages, weight loss rate AB+LRC 24.03% in second stage (194.60–404.63 °C), lower than calculated value. However, third (404.63–594.33 °C) 13.33%, higher content volatile products increased during co-pyrolysis, resulting a total There synergistic effect between AB Aromatic hydrocarbon release intensity significantly enhanced it stronger alone; contrast, gaseous weaker alone. In tar, monocyclic bicyclic aromatic hydrocarbons increased. C<10 component 86.48%, value 12.68%. proportion phenols compared