常温常压KBH_4还原法快速脱除水煤浆中的硫  

Rapid sulfur removal from coal water slurry by potassium borohydride reduction under ambient conditions

作　　者：沈亚飞[1] 孙同华[1] 贾金平[1] 刘训悦[2] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240 [2]浙江大学原子核农业科学研究所,杭州310029

出　　处：《环境化学》2012年第5期697-701,共5页Environmental Chemistry

基　　金：国家高新技术研究发展计划(863计划;2009AA062603)资助

摘　　要：使用KBH4还原法脱除水煤浆中的硫.在常温常压,KBH4浓度为2.0 mmol.L-1、煤炭粒径109μm、处理时间10 min、搅拌速度为200 r.min-1的条件下,低硫水煤浆中煤炭的总脱硫率可以达到43.0%.而且硫酸盐硫的脱除率约47.8%,黄铁矿硫的脱除率约55.4%;同时有机硫的脱除率约23.9%.硼氢化钾还原法相比其它传统化学脱硫方法,对有机硫和无机硫脱除均有作用,试剂用量少,反应条件温和,脱硫速度快,热值的损耗小,处理后水煤浆中煤炭的热值有所提高,起燃温度降低.The present work employed KBH4 reduction to remove sulfur in coal water slurry（CWS） for the first time.Under the conditions of normal pressure and temperature,2.0 mmol·L-1 KBH4,109 μm coal particle,10 min treatment time and 200 r·min-1 shaking rate,the total sulfur reduction of low-sulfur CWS was about 43.0%.The removal efficiency of sulfate sulfur was 47.8%,and the removal efficiency of pyrite sulfur was 55.4%.Besides,organic sulfur reduction was 23.9%.Compared with traditional chemical desulfurization methods,the current method was effective in removing both organic and inorganic sulfurs.It also used less reagent,mild reaction conditions,short treatment time,and less loss of calorific value.After the treatment,calorific value of CWS got improved,and ignition temperature was reduced.

关 键 词：水煤浆 硼氢化钾 还原脱硫 

分 类 号：TQ536[化学工程—煤化学工程]