为探究钙基前驱体对Ni/CaO双功能材料（DFM）活性的影响，分别以分析纯Ca（NO₃）₂·4H₂O、Ca（CH₃OO）₂·H₂O、CaCl₂和Ca（ClO）₂为CaO前驱体制备Ni/CaO-DFM[w（Ni）=10%]，并考察了4种Ni/CaO-DFM转化CO₂的性能。利用TGA、BET、SEM、XRD、H₂-TPR等方法对Ni/CaO-DFM进行表征。结果表明，以分析纯Ca（NO₃）₂·4H₂O为CaO前驱体制备的Ni/CaO-DFM（R1）孔隙发达、结构蓬松，对CO₂的吸附量明显优于其他样品，且R1生成的CaCO₃最易分解，有利于实现Ni/CaO-DFM的循环利用；同时，R1中与CaO接触较为紧密的NiO分散度提高，Ni的活性增强。固定床实验表明，4种Ni/CaO-DFM中R1对CO₂转化效率最高，达到30%，CO产量达到0.514 mmol/g；R1的耐久性强，经过10个碳吸附解析循环，质量保持在88.4%左右且无明显烧结现象。

In order to investigate the effect of calcium-based precursors on the activity of Ni/CaO dual function material (DFM),analytically pure Ca(NO₃)₂·4H₂O,Ca(CH₃OO)₂·H₂O,CaCl₂ and Ca(ClO)₂ are used as CaO precursors to prepare Ni/CaO-DFM(W_Ni=10%),and the catalytic performances of four kinds of Ni/CaO-DFMs in conversion of CO₂ are evaluated.Ni/CaO-DFM is characterized by means of thermogravimetric analysis (TGA),isothermal nitrogen adsorption desorption (BET),scanning electron microscope (SEM),X-ray diffraction analysis (XRD),programmed temperature reduction (H₂-TPR) and other measurements.The results show that Ni/CaO-DFM (R1) prepared by using analytically pure Ca(NO₃)₂·4H₂O as CaO precursor owns developed pores and fluffy structure,and its adsorption capacity to CO₂ is significantly better than other samples.CaCO₃ generated by R1 is most easily decomposed,which is conducive to the recycling of Ni/CaO-DFM.Moreover,the dispersity of NiO in R1,which is in close contact with CaO,increases and the activity of Ni increases.The experiment through fixed bed shows that among four Ni/CaO-DFMs,R1 gives the highest CO₂ conversion efficiency,reaching 30%,and CO output reaches 0.514 mmol·g^-1.R1 has strong durability.After 10 cycles of carbon adsorption and desorption,the mass of R1 has kept at about 88.4% and there is no obvious sintering phenomenon.

康东芮(1991-),女,硕士研究生,研究方向为CO₂捕集及利用,314113605@qq.com