磷石膏-废氨水对CO_2矿化能力的研究  

Study on mineralization ability for CO_2 of phosphogypsum-waste aqueous ammonia

作　　者：张红星 谭晓婷 王奕晨 郑化安 张生军 田士东 岳婷婷 李克伦 杜秉霖 

机构地区：[1]陕西煤业化工技术研究院有限责任公司,陕西西安710065 [2]国家能源煤炭分质清洁转化重点实验室,陕西西安710065

出　　处：《磷肥与复肥》2017年第10期10-13,共4页Phosphate & Compound Fertilizer

基　　金：陕西省社会发展科技攻关项目(2015SF269)

摘　　要：利用磷石膏和废氨水对二氧化碳(CO_2)进行矿化反应,研究反应温度、反应时间、液固比、氮硫物质的量之比、CO_2流量、搅拌转速、水洗预处理次数等因素对磷石膏-废氨水体系矿化CO_2能力的影响。通过实验确定最佳反应条件:反应温度40℃、反应时间60 min、液固比8.0 m L/g、氮硫物质的量之比2.4、CO_2流量500 m L/min、搅拌转速300 r/min、水洗预处理次数3次。在此条件下,磷石膏-废氨水对CO_2的矿化能力可达到100g磷石膏固定CO_223.60 g。Based on the mineralization reaction of phosphogypsum and waste aqueous ammonia with CO_2,theinfluence of different factors on the mineralization ability are studied including reaction temperature,reactiontime,liquid-solid ratio,nitrogen-sulfur ratio,CO_2 flow,stirring speed and pre-washed with water.Theexperimental results show that the optimum conditions are as follows：reaction temperature is 40 ℃,reaction time is60 min,liquid-solid ratio is 8.0 m L/g,nitrogen-sulfur ratio of amount of substance is 2.4,CO_2 flow is 500 m L/min,stirring speed is 300 r/min and pre-washed with water is 3 times.Under the optimum conditions,the mineralizationability for CO_2 of phosphogypsum-waste aqueous ammonia can achieve to 23.60 g CO_2 per 100 g phosphogyspum.

关 键 词：二氧化碳 矿化 磷石膏 废氨水 

分 类 号：X701[环境科学与工程—环境工程] X78