电化学制备硼氢化钠用于汽油脱硫的研究

研究了利用电化学方法将偏硼酸钠还原成硼氢化钠，并加入一种金属化合物，用于汽油脱硫的方法。首先通过热力学计算，偏硼酸钠由电化学还原的方法生成硼氢化钠是可行的。考察了不同金属化合物、自制阴极电解液体积、反应时间、还原脱硫体系含水量等因素对汽油脱硫率的影响。结果表明，用10mL饱和硫酸镍甲醇溶液加入到30mL汽油中，再加入50mL阴极电解液，反应时间为15min后，催化裂化汽油的硫含量从310μg/g降低到161μg/g，其汽油脱硫率达48.1％。

STUDY ON THE PREPARATION OF SODIUM BOROHYDRIDE BY ELECTROCHEMISTRY DEOXIDATION AND ITS APPLICATION IN THE DESULFURIZATION OF GASOLINE

A method for removing sulfur compounds from gasoline was investigated involving the conversion of sodium metaborate to sodium borohydride by electrochemistry deoxidation and the incorporation of a kind of metal compounds. Base on the thermodynamic calculation result, the feasibility of converting sodium metaborate to sodium borohydride by electrochemistry deoxidation was validated. Then the effects of various metal compounds, the volume of cathode electrolyte, reaction time and the water content in the deoxidation system on the desulfurization rate of gasoline were studied. The results showed that under the conditions of adding 10 mL saturated nickel sulfate methanol solution into 30 mL FCC naphtha, then adding 50 mL of prepared cathode electrolyte with a reaction time of 15 min, the sulfur content of FCC naphtha could be dropped to 161 μg/g from the original 310 μg/g, the sulfur removal rate reached 48.1%.