磷酸-水热耦合活化法制备的活性焦及吸附性能
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摘要
将新疆淖毛湖提质长焰煤与废旧橡胶粉共热解所得半焦产物作为原料,采用磷酸-水热耦合活化法制备活性焦。以亚甲基蓝吸附值为指标,探究活化条件对活性焦吸附性能的影响,结果表明:在磷酸质量分数为48.73%、活化温度为448K、活化时间为9h的条件下制备的活性焦的亚甲基蓝吸附值最高,达154.21mg/g,比未活化时提高了6倍。FTIR测试结果表明,活性焦中含有大量羟基。SEM测试结果表明,活性焦的表面粗糙,具有大量孔结构。BET分析结果表明,活化焦的比表面积为410.71m~2/g,总孔容为0.538cm~3/g,中孔占比达55%以上。
Activated char was prepared from co-pyrolysis of refined long-flame coal from Naomaohu in Xinjiang and waste rubber powder,using phosphoric acid-hydrothermal coupling activation method.The effects of activation conditions on the adsorption properties of activated char were investigated through taking methylene blue adsorption value as the adsorption index.The results show that when the mass fraction of phosphoric acid is 48.73%,the activation temperature is 448 K,and the activation time is 9 h,the methylene blue adsorption value of activated char is up to 154.21 mg/g,which is 6 times higher than that before activation.The results of FTIR test show that the activated char contains a large number of hydroxyl groups.The results of SEM test show that the surface of activated char is rough,and it has a large number of pore structures.The results of BET analysis show that the specific surface area of activated char is 410.71 m~2/g,the total pore volume is 0.538 cm~3/g,and the mesopore accounts for more than 55%.
Activated char was prepared from co-pyrolysis of refined long-flame coal from Naomaohu in Xinjiang and waste rubber powder,using phosphoric acid-hydrothermal coupling activation method.The effects of activation conditions on the adsorption properties of activated char were investigated through taking methylene blue adsorption value as the adsorption index.The results show that when the mass fraction of phosphoric acid is 48.73%,the activation temperature is 448 K,and the activation time is 9 h,the methylene blue adsorption value of activated char is up to 154.21 mg/g,which is 6 times higher than that before activation.The results of FTIR test show that the activated char contains a large number of hydroxyl groups.The results of SEM test show that the surface of activated char is rough,and it has a large number of pore structures.The results of BET analysis show that the specific surface area of activated char is 410.71 m~2/g,the total pore volume is 0.538 cm~3/g,and the mesopore accounts for more than 55%.
引文
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[2]扬子江.快速热解是废轮胎回收炭黑的优化工艺方案[J].中国轮胎资源综合利用,2018(12):24.YANG Zijiang.Rapid Pyrolysis is an Optimized Process for Recovering Carbon Black from Waste Tires[J].China Tire Resources Recycling,2018(12):24.
[3]张冰,付琦,梁畅.废轮胎橡胶热解技术研究进展[J].橡塑技术与装备,2018,44(15):19-23.ZHANG Bing,FU Qi,LIANG Chang.Research Progress on Waste Tire Rubber Pyrolysis Technology[J].China Rubber/Plastics Technology and Equipment,2018,44(15):19-23.
[4]李翠华,何选明,易霜,等.甘蔗渣与褐煤低温共热解产物特性分析[J].煤炭转化,2017,40(2):29-35.LI Cuihua,HE Xuanming,YI Shuang,et al.Analysis of Low-temperature Co-pyrolysis Product of Sugarcane Bagasse and Lignite[J].Coal Conversion,2017,40(2):29-35.
[5]程晓晗,何选明,柴军,等.石莼与褐煤低温共热解产物的特性[J].化工进展,2016,35(1):105-109.CHENG Xiaohan,HE Xuanming,CHAI Jun,et al.Characteristics of Low-temperature Co-pyrolysis Products of Ulva and Lignite[J].Chemical Industry and Engineering Progress,2016,35(1):105-109.
[6]李沙沙,刘杰飞,张莉,等.废轮胎与煤的共热解特性[J].中国轮胎资源综合利用,2017,39(3):31-35.LI Shasha,LIU Jiefei,ZHANG Li,et al.Co-pyrolysis Characteristics of Waste Tires and Coal[J].China Tire Resources Recycling,2017,39(3):31-35.
[7]邓德敏,刘霞,廖洪强.废轮胎与煤共热解失重特性研究[J].化工环保,2010,30(2):117-120.DENG Demin,LIU Xia,LIAO Hongqiang.Thermogravimetric Characteristic of Waste Tyre in Co-pyrolysis with Coal[J].Environmental Protection of Chemical Industry,2010,30(2):117-120.
[8]常娜,陈延信,甘艳萍.微负压系统中煤与橡胶共热解的协同作用[J].煤化工,2013,41(1):47-50.CHANG Na,CHEN Yanxin,GAN Yanping.Study on the Synergy of Coal and Rubber Co-pyrolysis Process at Micro Negative Pressure[J].Coal Chemical Industry,2013,41(1):47-50.
[9]刘海兵.尾煤和废轮胎共热解研究[D].北京:中国矿业大学(北京),2012.LIU Haibing.Study on the Co-pyrolysis of Tailings Coal and Waste Tires[D].Beijing:China University of Mining and Technology(Beijing),2012.
[10]武明华.煤和废橡胶粉的共热解研究[D].大连:大连理工大学,2007.WU Minghua.Co-pyrolysis of Coal and Waste Rubber Powder[D].Dalian:Dalian University of Technology,2007.
[11]CUNLIFFE A M,WILLIAM P T.Composition of Oils Derived from the Batch Pyrolysis of Tires[J].Journal of Analytical and Applied Pyrolysis,1998,44(2):131-152.
[12]罗雄威,马宝岐.活性半焦的应用性研究[J].煤炭加工与综合利用,2014(6):73-76.LUO Xiongwei,MA Baoqi.Application of Activated Semi-coke[J].Coal Processing and Comprehensive Utilization,2014(6):73-76.
[13]严伟.毛竹水热功能炭材料的制备、表征与性能研究[D].杭州:浙江大学,2018.YAN Wei.Preparation,Characterization and Properties of Functional Hydrochar Materials Derived from Mosobamboo[D].Hangzhou:Zhejiang University,2018.
[14]王依雪.山核桃壳基水热炭的制备及其对碱性染料的吸附性能研究[D].长春:吉林大学,2016.WANG Yixue.Preparation of Walnut Shell-based Hydrothermal Biochar and Its Adsorption of Basic Dyes[D].Changchun:Jilin University,2016.
[15]吴艳姣.生物质水热炭的制备及性能研究[D].哈尔滨:东北林业大学,2016.WU Yanjiao.Preparation and Properties Research of Bio-based Hydrochar[D].Harbin:Northeast Forestry University,2016.
[16]何铁石,杜微,郭中台,等.水热法二次活化超级电容器用活性炭研究[J].电子元件与材料,2013,32(11):35-38.HE Tieshi,DU Wei,GUO Zhongtai,et al.Reactivation of Activated Carbon for Supercapacitor Under Hydrothermal Conditions[J].Electronic Components and Materials,2013,32(11):35-38.
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[18]冯玲玲,卫新来,张娜,等.氯化锌活化梧桐树皮制备活性炭及其特性表征[J].阜阳师范学院学报(自然科学版),2016,33(1):41-45.FENG Lingling,WEI Xinlai,ZHANG Na,et al.Preparation and Characterization of Activated Carbon from Sycamore Bark by Zinc Chloride[J].Journal of Fuyang Normal University(Natural Science),2016,33(1):41-45.
[19]张芸.磷酸活化兰炭粉末制备活性炭的研究[J].煤炭科学技术,2016,44(2):180-184.ZHANG Yun.Study on Activated Carbon Prepared with Phosphoric Acid Activated Semi-coke Powder[J].Coal Science and Technology,2016,44(2):180-184.
[20]吴鹏,滕济林,张旭辉.兰炭活性焦的制备及应用性能研究[J].煤炭技术,2017,36(11):333-335.WU Peng,TENG Jilin,ZHANG Xuhui.Preparation and Application Properties Research on Activated Coke Based on Semicoke[J].Coal Technology,2017,36(11):333-335.
[21]刘靖,何选明,柯萍,等.石莼基微/中孔复合结构活性炭的制备及性能[J].精细化工,2019,36(2):225-230.LIU Jing,HE Xuanming,KE Ping,et al.Preparation and Properties of Micro-and Mesoporous Ulva-based Activated Carbon[J].Fine Chemicals,2019,36(2):225-230.