【摘要】 以白云石矿为脱硫剂,研究了不同脱硫温度、不同Ca/S值（CaO与SO₂摩尔比）,以及添加CaCl₂·2H₂O脱硫助剂对燃煤脱硫性能的影响。结果表明,白云石矿具有较好的脱硫性能,在空气流量200 mL/min,Ca/S=2,随着脱硫温度升高脱硫效率逐渐增加,900℃时,白云石脱硫效率可达75.23%。随着Ca/S值增加脱硫效率快速增加,Ca/S值超过2后脱硫效率缓慢增加。白云石中添加CaCl₂·2H₂O改性剂可以明显提高白云石脱硫效率,添加3%CaCl₂·2H₂O时脱硫效率可以从75.23%提高到84.58%。采用XRD和FESEM对脱硫产物进行物相和显微形貌表征,探索了白云石脱硫过程及机理。更多还原

【Abstract】 Dolomite was used as desulfurizer during coal combustion in this study. The effects of different desulfurization temperature, different Ca/S ratio（molar ratio of CaO to SO₂） and adding CaCl₂·2 H₂O as assistant on desulfurization performance were studied. The study found that the dolomite has good desulfurization performance. The desulfurization efficiency of dolomite is 75.23% under the condition of 900 ℃, Ca/S=2 and air flow rate is 200 mL/min. With the increase of Ca/S, the desulfurization efficiency increased rapidly while Ca/S increased from 1 to 2. When Ca/S exceeded 2, the desulfurization efficiency increases slowly. The study found that adding CaCl₂·2 H₂O in dolomite can obviously increase the desulfurization efficiency. The desulfurization efficiency can be increased from 75.23% to 84.58% when adding 3% CaCl₂·2 H₂O in dolomite. The dolomite desulfurization process and its mechanism were explored through the study of the phase and microscopic morphology analysis of desulfurization products by XRD and FESEM.更多还原