纳米ZnO脱硫剂硫容的测定及其测定条件的研究

对采用燃烧-酸碱滴定法测定纳米ZnO脱硫剂硫容的测定条件进行了研究,并对脱硫剂的硫容进行了测定.实验结果表明,测定硫容时称样量大,测定结果偏低,在0.015 0~0.0070 g有最佳测定值;吸收液中无H2O2存在时,测定结果偏低;H2O2含量过大,使吸收液pH值下降,当吸收液pH值小于酸碱指示剂的变色点5.1时,测定结果偏高;酸碱指示剂的用量以每120 mL溶液中,滴入2~3滴为宜;在最佳测定条件下,测定硫容与理论硫容的相对误差小于5%.

Study on the measurement of the sulfur capacity and the measurement conditions of the nanocrystalline ZnO desulfurizer

The measurement conditions of sulfur capacity of nanocrytalline ZnO as a desulfurizer, measured with the technique of the acid-alkali titration, were studied, and the sulfur capacity was also measured. It was proven by the experiment that when weighing quantity of the sample was larger, the measuring level became less, but within 0. 015 0 g -0. 007 0 g, the measurement was the best. In the absorbent with no H2O2, the measurement results were in less level. However when H2O2 increased, the pH value of absorbent became smaller. When the pH value was less than 5. 1 of colour changing point in the indicator acid-alkali, the measurement results were in higher level. The dose of indicator acid-alkali in every 120 mL solvent was dripped in two or three drops. In the proper condition, the relative error between the theoretic acid capcity and measuring one was less than that of 5%.