烟气脱硫活性炭纤维毡催化剂的研究

将活性炭纤维毡用浸渍法进行处理，实验确定的浸渍条件为：浸渍混合液中含NH₄VO₃ 质量分数为197%, CsNO₃质量分数为068%，浸渍液温度70 ℃，1 250 mL浸渍液浸渍活性炭纤维（ACF） 20 g，每次浸渍时间6 h，重复浸渍3次。随后在N₂保护下于250 ℃焙烧50 min,冷却至室温得到ACF催化剂。在实验室模拟试验装置上对ACF催化剂的烟气脱硫反应特性进行测试。实验结果表明,对烟气脱硫的反应活性次序为：KI-ACF＞V₂O₅-Cs₂O-ACF＞空白-ACF。并且在烟气中含 SO₂0.225 mol·m^－3，空速为2 400 h^－1，反应温度348 K，测取实验数据，回归得到烟气在V₂O₅-Cs₂O-ACF上脱除硫的反应动力学方程:dc_SO2/dt=0.072exp(－7.843×10³/RT)c_SO2^1.025·c_O2^0.579。

Study on carbon fibre felt catalyst for flue gas desulfurization

Activated carbon fiber(ACF) felt was impregnated under the following condition: impregnating solution containing 1.96%(mass fraction) NH₄VO₃, 0.68%(mass fraction) CsVO₃,impregnating temperature 70 ℃,20 g ACF impregnated in 1 250 mL impregnating solution for three times with six hours each time. The impregnated ACF was then calcined in nitrogen atmosphere at 250 ℃ for 50 minutes, and cooled down to room temperature to obtain ACF catalyst. Properties of the ACF catalyst for flue gas desulfurization was tested on a simulation bench-scale apparatus. The test results showed that activity of the ACF felt catalyst of flue gas desulfurization were as follow:KI-ACF＞V₂O₅-Cs₂O-ACF＞air-ACF. Kinetic equation for flue gas desulfurization over V₂O₅-Cs₂O-ACF catalyst was dc_SO2/dt=0.072exp(－7.843×10³/RT)c_SO2^1.025·c_O2^0.579, obtained under the following condition: 348 K, 0.225 mol·m^－3 SO₂ in flue gas, GHSV 2 400 h^－1.