OXIDATIVE REGENERATION OF SULFIDED SORBENT BY H2S WITHOUT EMISSION OF SO2

被引：7

作者：

LEE, YS ^{[1
]}

PARK, DH ^{[1
]}

KIM, HT ^{[1
]}

YOO, KO ^{[1
]}

机构：

[1] HANYANG UNIV,DEPT CHEM ENGN,SEOUL 133791,SOUTH KOREA

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 1995年 / 12卷 / 01期

关键词：

OXIDATIVE REGENERATION OF SULFIDED SORBENT; SO2; REMOVAL; EPMA; PRODUCT LAYER DIFFUSION CONTROL;

D O I：

10.1007/BF02697702

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Much SO2, another perilous air pollutant, was emitted during the oxidative regeneration of sulfided sorbent by H2S. In order to prevent emission of SO2, we carried out oxidative regeneration with the physical mixture of CaO and sulfided sorbent and investigated the effect of regeneration temperature and oxygen concentration on the reactivity of CaO with SO2. The effluent gases were analyzed by G.C. and the properties of sorbent were characterized by XRD, SEM, TG/DTA and EPMA. Deterioration of reactivity of CaO with SO2 resulted in increment of emission of SO2 due to the structural changes of CaO above 750-degrees-C and that at 850-degrees-C was more severe. Furthermore EPMA and XRD analysis revealed that product layer diffusion through the solid product, CaSO4, was the rate limiting step for CaO sulfidation. The reaction of CaO with SO2 was first order approximately and that was accelerated by high O2 concentration.

引用

页码：23 / 28

页数：6

共 27 条

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