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时间:2020-03-23
《酸性糠醛残渣热解实验及热解炭性能研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第45卷第1期2017年1月化学工程CHEMICALENGINEERING(CHINA)V01.45No.1Jan.2017酸性糠醛残渣热解实验及热解炭性能研究陈文义1”,蔡雨辰1”,孙姣1”,贺强1’2(河北工业大学1.过程装备与控制工程系;2.工程流动与过程强化研究中心,天津300130)摘要:为解决糠醛渣的堆放及资源的合理利用,以糠醛渣为研究对象,分别在同步热分析仪及管式炉上进行热解实验研究,主要考察热解终温、升温速率、碳酸钠含量对糠醛渣热解产物分布及热解炭性能的影响。同步热分析仪分别以10—40c12/min的升温速率升高到850℃(1
2、0。C/min添加碳酸钠);管式炉上以10。C/min的升温速率到达热解终温300“00℃。结果表明:热重分析确定热解失重过程为干燥段、挥发分逸出段、热解炭化段3个阶段,确定主要热解温度区间为300—600℃。添加碳酸钠后抑制水分的析出,失重变化率峰值变大,表明碱金属钠盐促进纤维素的分解。随着热篇温度的升高热解碳的pH值逐渐增大,热解温度为400℃时达到最高的亚甲基蓝脱色率44.4%。热解炭可进一步用于活性炭染料吸附。关键词:糠醛残渣;热解;热解炭中图分类号:TK6文献标识码:A文章编号:1005—9954(2017)01-0005-06DoI
3、:10.3969/j.issn.1005-9954.2017.01.002AcidicfurfuralresiduepyrolysisexperimentsandpyrolyticcarbonperformanceCHENWen-yil一,CAIYu.chenl一,SUNJia01一,HEQian91·2(1.DepartmentofProcessEquipmentandControlEngineering;2.ResearchCenterofEngineeringFluidandProcessEnhancement,HebeiUniversi
4、tyofTechnology,Tianjin300130,China)Abstract:Inordertosolvethefu曲ralslagpileandtherationaluseofresources,withfurfuralresidueastheresearchobject,thepyrolysisexperimentswereconductedinsynchronousthermalanalyzerandtubularfurnacerespectively.Thefinalpyrolysistemperature,heatingra
5、teandsodiumcarbonatethatinfluencedthefurfuralresiduepyrolysisproductdistributionandthepyrolyticcarbonperformanceweremainlyinvestigated.Thesynchronousthermalanaly7zerincreasedto850℃(addingsodiumcarbonateat10oC/rain)respectivelywiththeheatingrateof10-40。C/min.Thetubefurnacerea
6、chedtheterminaltemperaturepyrolysisat300-600。Cwiththeheatingrateof10。C/min.Theresultsshowthatthewholethermaldecompositionweightlessnessprocesscanbedividedintothreesectionsofdryingsection,thevolatileevolutionsectionandpyrolysiscokingsection.andthemainpyrolysistemperaturerange
7、is300-600℃bythethermogravimetricanalysis.Afteraddingsodiumcarbonateinhibitedtheprecipitationofmoisture,theweightlessnessratepeakbecomelarger,whichshowedthatalkalimetalsodiumsaltpromotedthedecompositionofcellulose.ThepHofthepyrolyticcarbongraduallyincreasedwiththeincreasesofp
8、yrolysistemperature,andreachedthehighestwhenthemethylenebluedecolorizationr
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