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CO2 CAPTURE USING NANOPOROUS TIO(OH)2/TETRAETHYLPENTAMINE

机译:纳米TIO(OH)2 /四乙基苯丙胺捕获二氧化碳

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In this work, an inorganic-organic CO2 sorbent was prepared by immobilizing tetraethylenepentamine (TEPA) onto nanoporous titanium oxyhydrate (TiO(OH)2). The prepared sorbents were characterized using X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and Brunauer-Emmett-Teller (BET) analysis. At the optimal TEPA loading of 60 wt.% on TiO(OH)2, its CO2 sorption capacity reached 3.1 mmol CO2/g-sorbent for 1 vol.% CO2 in N2 along with -1 vol.% H2O at 60℃. Studies of adsorption kinetics and thermodynamics showed that the activation energies for CO2 adsorption and desorption of TiO(OH)2/TEPA are 38.31 kJ/mol and 44.51 kJ/mol, respectively. Its low CO2 desorption activation energy means a high CO2 dsorption rate and thus a low CO_2 capture cost. The sorbent has the potential to be used for capturing ultra-dilute CO2 from gas mixtures.
机译:在这项工作中,通过将四亚乙基五胺(TEPA)固定在纳米多孔羟基氧化钛(TiO(OH)2)上制备了无机有机CO2吸附剂。使用X射线衍射,傅立叶变换红外光谱(FTIR),扫描电子显微镜(SEM),热重分析(TGA)和Brunauer-Emmett-Teller(BET)分析对制得的吸附剂进行表征。在60%(重量)的TiO(OH)2上的最佳TEPA​​负载下,在60℃下,N2中1%(体积)的CO2和-1%(体积)的H2O的CO2吸附容量达到3.1 mmol / g-吸附剂。吸附动力学和热力学研究表明,TiO(OH)2 / TEPA的CO2吸附和解吸活化能分别为38.31 kJ / mol和44.51 kJ / mol。其低的CO2解吸活化能意味着高的CO2吸附速率,从而降低了CO_2的捕集成本。该吸附剂有潜力用于从混合气体中捕获超稀二氧化碳。

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