采用微波水热法合成了具有发达孔结构的钛酸盐纳米管(TiNTs),并用浸渍法将二乙烯三胺(DETA)、三乙烯四胺(TETA)、四乙烯五胺(TEPA)负载至钛酸盐纳米管上,用以吸附分离CO2和CH4。利用扫描电镜(SEM)、低温氮吸附仪(BET)、傅里叶变换红外光谱(FT-IR)等方法对吸附剂结构进行表征,通过贝士德吸附仪研究其CO2和CH4的吸附性能,并对CO2/CH4的分离系数进行模拟计算。结果表明,60% TEPA改性的TiNTs分离因子最大,能很好地分离CO2和CH4;胺修饰的TiNTs除具有较高的CO2吸附能力外,还具有良好的分离能力,在煤层气CO2脱除方面表现出很大的应用潜力。
Titanate nanotubes(TiNTs) with well-developed pore structure were synthesized by microwave hydrothermal method,and modified with diethylenetriamine (DETA),triethylenetetraamine (TETA) and tetraethylenepentamine (TEPA),and the adsorbents were modified by adsorption and separation of CO2 and CH4.The sorbents were characterized by scanning electron microscopy (SEM),low-temperature nitrogen adsorption (BET),fourier transform infrared spectroscopy (FT-IR),and the adsorption properties of CO2 and CH4 were studied by using Beishide adsorption instrument,langmuir simulation were applied to investigate the separation coefficient of carbon dioxide and methane.The results shown that the 60% TEPA-TiNTs was more suitable for the adsorptive separation of the mixtures of CO2/CH4 than other samples.The amine-modified TiNTs not only had higher CO2 adsorption capacity,but also had good separation ability,indicating that it had great potential for removal of CO2 from coalbed methane.
[1] Cox P M,Betts R A,Jones C D,et al.Acceleration of global warming due tocarbon-cycle feedbacks in a coupled climate model[J].Letters to Nature,2010,408(6809):184-187.
[2] 冯明,陈力,徐承科,等.中国煤层气资源与可持续发展战略[J].资源科学,2007,2(3):100-104.
[3] Sim S,Cole I S,Choi Y S,et al.A review of the protection strategies against internal corrosion for the safe transport of supercritical CO2 via steel pipelines for CCS purposes[J].International Journal of Greenhouse Gas Control,2014,29:185-199.
[4] Jiang G,Huang Q,Kenarsari S D,et al.A new mesoporous amine-TiO2 based pre-combustion CO2 capturetechnology[J].Applied Energy,2015,147:214-223.
[5] Maryam I,Bryce D,Maohong F,et al.CO2 capture using nanoporous TiO(OH)2/tetraethylenepentamine[J].Fuel,2016,183:601-608.
[6] D'Alessandro D M,Smith B,Long J R,et al.Carbon dioxide capture:prospects for new materials[J].Angewandte Chem International Edition,2010,49(35):6058-6082.
[7] 吴彬,黄坤荣,刘子健.化学吸收法捕集二氧化碳研究进展[J].广州化工2017,45(11):11-15.
[8] Xiao Q,Wen J,Guo Y,et al.Synthesis,carbonization,and CO2 adsorption properties ofphloroglucinol-melamine-formaldehyde polymeric nanofibers[J].Industrial & Engineering Chemistry Research,2016,55(49):12667-12674.
[9] Song F,ZhaoY,Zhong Q.Adsorption of carbon dioxide on amine-modified TiO2 nanotube[J].Journal of Environmental Sciences,2013,24:554-560.
[10] 滕一万,武法文,王辉.CO2/CH4高分子气体分离膜材料研究进展[J].化工进展,2007,26(8):1075-1079.
[11] Drage T C,Smith K M,Pevida C,et al.Development of adsorbent technologies for post-combustion CO2 capture[J].Energy Procedia,2009,1(1):881-884.
[12] Venna S R,Carreon M A.Highly permeable zeolite imidazolate framework-8 membranes for CO2/CH4 separation[J].Journal of the American Chemical Society,2010,132(1):76-78.
[13] 刘洁.纳米管基CO2吸附剂的制备及其改性研究[D].浙江:浙江大学,2013.
[14] Zhou F,Yan C,Wang H,et al.Sepiolite-TiO2 nanocomposites for photocatalysis:Synthesis by microwave hydrothermal treatment versus calcination[J].Applied Clay Science,2017,146:246-253.
[15] Guo L,Hu X,Hu G,et al.Tetraethylenepentamine modified protonated titanate nanotubes for CO2 capture[J].Fuel Processing Technology,2015,138:663-669.
[16] 乐垚.二氧化硅的形貌调控及其性能研究[D].武汉:武汉理工大学,2013.
[17] 王琳.胺基功能化多子孔材料的制备及其二氧化碳吸附性能的研究[D].浙江:浙江师范大学,2016.
基金资助
国家自然科学基金(41772166);陕西省重点研发计划(2017DZCXL-GY-10-01-02)
PDF
(2806KB)
