Abstract
This paper reports on the results of the investigation of tar removal by combination of reforming and adsorption processes. Tar was produced from chicken manure pyrolysis at the pyrolysis temperature of 700 ℃. Chicken manure contains 5.2% nitrogen by weight (dry base) which is about tenfold or much higher than conventional woody biomass that promotes formation of the tar-N (nitrogen heterocyclic compounds) together with the tar-C (aromatic compounds). The experimental results demonstrated that the tar-N was decomposed completely with the high reforming temperature of 900 ℃, but the tar-C increased when we increased the reforming temperature from 800 ℃ to 900 ℃. That is, the reforming process is not enough to remove sufficient amount of tar, especially tar-C. Therefore, the adsorption bed was installed downstream of the reformer in order to remove tar remaining after the reforming process. Activated carbon and wood chips were selected to demonstrate their adsorption ability for not only tar-C but also for tar-N.
