CAJ | 학술논문

为了研究石灰石煅烧产物 CaO 的孔隙特征与脱硫过程的关系,建立了 CaO 孔结构特征的数学模型,利用模型计算了 CaO 内部孔的比表面积和孔容积,计算值与实测值吻合良好.重点对0～5 nm,5～20 nm,20～100 nm及>100 nm 4个孔径范围进行了分析,结果表明:在 3 种试样中,试样 A 的粒径最大,孔径分布最宽,函数峰值所对应的孔半径及平均孔半径最大;试样 B 的粒径居中,但是孔径分布最窄,函数峰值所对应的孔半径及平均孔半径最小;粒径最小的试样 C,煅烧时可能部分烧结,导致函数峰值所对应的孔半径及平均孔半径比试样 B 大.在 3 种试样中,试样 B 的有效孔径(5～20 nm)所占的比例最大,由此预测其脱硫效果最好,选取上述 3 种粒径石灰石煅烧产物进行脱硫实验,实验结果与预测结果一致.
위료연구석회석단소산물 CaO 적공극특정여탈류과정적관계,건립료 CaO 공결구특정적수학모형,이용모형계산료 CaO 내부공적비표면적화공용적,계산치여실측치문합량호.중점대0～5 nm,5～20 nm,20～100 nm급>100 nm 4개공경범위진행료분석,결과표명:재 3 충시양중,시양 A 적립경최대,공경분포최관,함수봉치소대응적공반경급평균공반경최대;시양 B 적립경거중,단시공경분포최착,함수봉치소대응적공반경급평균공반경최소;립경최소적시양 C,단소시가능부분소결,도치함수봉치소대응적공반경급평균공반경비시양 B 대.재 3 충시양중,시양 B 적유효공경(5～20 nm)소점적비례최대,유차예측기탈류효과최호,선취상술 3 충립경석회석단소산물진행탈류실험,실험결과여예측결과일치.
In order to find the relationship between the pore structure of Cad from limestone calcination and the desulfurization process, a mathematical model for describing the pore structure was developed, with which pore volume and specific surface area calculated. The calculated results agree well with that of actual measurements. With focus on following 4 pore size ranges: 0-5 nm, 5-20 nm, 20-100 nm and 100 nm above, 3 samples respectively coded as A, B and C were analyzed. Results show that among the 3 samples tested, sample A, whose particle sizes are the largest, has the widest range of pore size distribution, the largest pore size corresponding to the peak value and the largest average pore radius; sample B, whose particle sizes are the medium, has the narrowest range of pore size distribution, the smallest pore size corresponding to the peak value and the smallest average pore radius; sample C, whose particle sizes are the smallest, may be partially sintered, and therefore resulting in larger pore radius corresponding to the peak value and larger average pore radius than sample B. Particles of sample B have the largest proportion of effective radius (5-20 nm) among the 3 samples, and therefore it is believed to have the best desulfurization effect. This assumption has been proved by actual experiments based on Cad with above 3 sizes.