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1、石油學(xué)報(bào)(石油加工)2014年4月ACTAPETRO1ElSINICA(PETROIEUMPROCESSINGSECTION)第3o卷第2期文章編號(hào):1001—8719(2014)020320—08功能化硅基介孑L材料的合成及其CO2吸附性能張莉娜,王浩,秦張峰,樊衛(wèi)斌,王建國(guó)(1.中國(guó)科學(xué)院山西煤炭化學(xué)研究所煤轉(zhuǎn)化國(guó)家重點(diǎn)實(shí)驗(yàn)室,山西太原030001;2.中國(guó)科學(xué)院大學(xué),北京100049)摘要:以傳統(tǒng)的陽(yáng)離子表面活性劑十六烷基三甲基溴化銨(CTAB)和陰離子水溶性聚合物聚丙烯酸鈉(NaPAA)為復(fù)合模板劑,在室溫下合成了新型硅基介孑L材料;選用聚乙烯亞胺
2、(PEI)和硝酸鎂(Mg(NO。)?!?H。())對(duì)其進(jìn)行改性,制備了PEI和MgO改性硅基介孔材料。采用x射線衍射、N吸附一脫附、靜態(tài)體積法和程序升溫脫附手段考察了該硅基介孑L吸附材料的結(jié)構(gòu)和CO。吸附性能。結(jié)果表明,該硅基介孑L材料具有較大的比表面積和孔體積以及均勻的孔道結(jié)構(gòu),可以使改性劑很好地分散在其孔道內(nèi);PEI和MgO改性的硅基介孔吸附材料對(duì)CO。的吸附能力大大增強(qiáng)。在298K下,PEI負(fù)載質(zhì)量分?jǐn)?shù)為16.7的PEI改性硅基介孔材料對(duì)CO的吸附量最大,達(dá)到0.98mmol/g;MgO改性的硅基介孔材料在MgO負(fù)載質(zhì)量分?jǐn)?shù)為2O時(shí),對(duì)CO。的吸附量
3、最大。關(guān)鍵詞:硅基介孔材料;CO2;吸附;MgO;PEI;改性中圖分類號(hào):O647.3文獻(xiàn)標(biāo)識(shí)碼:Adoi:10.3969/j.issn.100卜8719.2014.02.020SynthesisofFunctionalizedMesoporousSilicaandItsPerformanceforCO2AdsorptionZHANGLina~,WANGHao,QINZhangfeng,F(xiàn)ANWeibin,WANGJianguo(1.StateKeyLaboratoryofCoalConversion,InstituteofCoalChemistry,Ch
4、ineseAcademyofSciences,Taiyuan,030001,China;2.UniversityofChineseAcademyofSciences,Beijing100049,China)Abstract:Mesoporoussilicawassynthesizedwiththemixtureofcationiccetyhrimethylammoiumbromide(CTAB)andanionicwater—solublesodiumpolyacrylate(NaPAA)astemplateatroomtemperature,andwas
5、furthermodifiedwithpolyethyleneimine(PEI)ormagnesiumnitratetogetPEI—loadedorMgO—loadedmesoporoussilicaadsorbentsforCO2.ThephysicalpropertiesandC()2adsorptioncapacityofas~preparedadsorbentsweredeterminedbyX—raypowderdiffraction(XRD),N2adsorption—desorption,CO2staticadsorptionandtem
6、peratureprogrammeddesorption.Theresultsindicatedthatthemesoporoussilicapossessedhighspecificsurfacearea,largeporevolumeanduniformporestructure.ThemodifiersofPEIandMgOwereuniformlydispersedinthechannelsofthemodifiedmesoporoussilica.TheadsorptioncapacitiesofthePEI—loadedandMgO—loade
7、dmesoporoussilicaadsorbentsforCO2wereenhancedsignificantly.ThehighestCO2adsorptioncapacityofPEI—loadedmesoporoussilicawasachievedat16.7PEIloading,whileanMgOloadingof20gavetheMgO—loadedmesoporoussilicathehighestCO2adsorptioncapacity.Keywords:mesoporoussilica;CO2;adsorption;MgO;PEI;
8、modification收稿日期:2013一l1一O6基金項(xiàng)目:國(guó)