A method of evaluating limestone reactivity with SO2 under fluidized bed combustion conditions

被引：16

作者：

Mattisson, T ^{[1
]}

Lyngfelt, A

机构：

[1] Univ Gothenburg, Dept Inorgan Chem, S-41296 Gothenburg, Sweden

[2] Chalmers Univ Technol, Dept Energy Convers, S-41296 Gothenburg, Sweden

来源：

CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 1998年 / 76卷 / 04期

关键词：

sulphur dioxide; limestone; reactivity; fluidized bed combustion; sulphur capture model;

D O I：

10.1002/cjce.5450760411

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The reactivity of limestone with sulphur dioxide has been evaluated during conditions similar to those existing in a fluidized bed combustor using a fixed-bed quartz reactor. The reactivity of up to 11 particle sizes of 2 limestones were evaluated, and an exponential decay function was found to best describe the rate behaviour versus conversion of CaO to CaSO4. The two constants in the exponential decay approximation could both be expressed as functions of particle size. Subsequently, the limestone reactivity as a function of both size and conversion could be reasonably well described by a total of 4 to 6 constants. An analytical sulphur capture model for fluidized bed boilers (FBB) that incorporates this type of reactivity function is proposed.

引用

页码：762 / 770

页数：9

共 40 条

[1] Comparison of mechanistic models for the sulfation reaction in a broad range of particle sizes of sorbents [J].