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- W2481753506 abstract "Abstract Pyrolysis biochar is widely used as the catalyst for tar cracking during biomass gasification. K and Ca in pyrolysis biochar affect the reforming of biomass tar under H 2 O or CO 2 atmosphere significantly. In this paper, the transformation mechanism of H-form/K-loaded/Ca-loaded biochar structures and the reaction route of model tar compounds catalytic reforming were identified. The results show that during the reforming of model tar compounds in 15% H 2 O or pure CO 2 at 800 °C, the release of K from biochar samples is nearly twice as that of Ca. More O-containing functional groups are formed on K-loaded biochar than Ca-loaded and H-form biochars. H 2 O or CO 2 activation increases the lattice defects and surface functional groups in biochars to promote the combination between biochar and model tar compounds. The pathways for tar reformed in H 2 O or CO 2 by K and Ca in biochar include direct homogeneous reforming and consumed by H 2 O or CO 2 gasification on biochar surface. Tars containing heteroatoms are converted faster than those containing aliphatic chains and pure aromatic rings. On catalytic reforming of naphthalene and toluene with biochars, in 15% H 2 O atmosphere the effect of K is about 10% greater than that of Ca, while in pure CO 2 atmosphere the effect of K is approximately 5% greater than that of Ca." @default.
- W2481753506 created "2016-08-23" @default.
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- W2481753506 date "2016-12-01" @default.
- W2481753506 modified "2023-10-15" @default.
- W2481753506 title "Effects of K and Ca on reforming of model tar compounds with pyrolysis biochars under H 2 O or CO 2" @default.
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- W2481753506 doi "https://doi.org/10.1016/j.cej.2016.07.065" @default.
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