In order to reduce the tar content in the gasification syngas of industrial organic waste furfural residue, on the one hand, increased the gasification temperature in the furfural residue gasification by adding high energy density coal and organic solid waste furfuralresidue for co-gasification to achieve thermal cracking of gasification tar and improve the carbon conversion. On the other hand, CaO catalysts was introduced to crack the tar, which enabled the purification of the syngas and increased the elemental utilization of the furfuralresidues gasification. In this study, the effect of CaO addition on the products in co-pyrolysis stage and co-gasification stage was investigated to supplement the basic data of syngas purification in furfural residue gasification. The results show that CaO can improve the pyrolysis rate and promote the transformation of raw materials to light oil and syngas during the furfural residue pyrolysis stage. In the furfuralresidues and coal co-gasification, compared with no catalysis added gasification, 17.42% of tar can be thermal cracking when CaO is added in a mechanical mix as mechanical mixing, while the CaO is added by impregnation method can make the tar removal rate up to69.41%, and the degree of tar lightening is improved. Both increasing temperature and adding CaO can decrease tar concentration and increase gas yield in co-gasification. In addition, X-ray diffraction spectroscopy (XRD) and scanning electron microscopy (SEM) wereused to analyze the solid residue after gasification. Due to the fluxing effect of CaO, ash agglomeration occurs at 1 000 ℃ .

陈玉卓(1995—),男,河北石家庄人,硕士研究生。E-mail:904902719@qq.com

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CHEN Yuzhuo,SONG Yuncai,FENG Jie.Influence of CaO on furfural residue/ coal co-gasification products[J].Clean CoalTechnology,2023,29(12):51-58.