摘要
在固体颗粒孔径增扩仪上对石灰石进行了孔径闪蒸增扩试验,并在气流反应器上对样品进行了脱硫试验研究.结果表明,在一定的压力和温度下,闪蒸改性试验能够增大石灰石的小孔孔径,降低石灰石的平均粒径,增加孔容积.由于石灰石孔径增扩后,孔隙之间的交联性得到了提高,所以使比表面积稍有减小.闪蒸改性后石灰石对反应气体的输运性能得到了较大的改善,减小了热解过程中烧结的影响,提高了孔隙内表面积的脱硫活性,所以在相同的试验条件下,孔径增扩后样品的脱硫效率得到了明显提高.
Modification of pore sizes of limestone particles was carried out in solid particle pore size enlarging apparatus by flash,and desulfurization experiments of some samples were accomplished in a drop tube reactor.The results show that under certain pressure and temperature, smaller pore size and pore volume of limestone are enlarged by the flash evaporation,the average particle size is reduced ,and after modification,the conjunction of pores is enhanced,so specific surface areas are reduced.Through flash modification,the transportation performance of reacting gas in limestone is improved greatly,thus reducing the sintering effect on pyrolysis and improving the desulfurizing activity of inner specific surface areas.So the desulfurization efficiency of modified samples is improved greatly under the same conditions.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2003年第3期280-284,共5页
Journal of Combustion Science and Technology
基金
国家重点基础研究专项经费基金资助项目(G1999022201 04)
浙江大学能源洁净利用与环境工程教育部重点实验室开放基金资助项目.
关键词
闪蒸
改性
石灰石
孔结构
脱硫
flash evaporation
modification
limestone
pore structure
desulfurization
