采用SEM、EDS、BET和气相色谱等分析方法,研究了NaOH碱处理对5A分子筛显微形貌、成分、比表面积、孔容和氢吸附性能的影响.结果表明,NaOH碱处理降低了5A分子筛骨架中硅铝比,增大分子筛比表面积、孔容和平均孔径,提高了分子筛活化温度.在77K温度及100KPa压力下,碱处理5A分子筛对含0.1vol％H2/He混合气体吸附后尾气氢浓度小于1ppm,氢吸附容量为6.9ml/g.碱处理增加了5A分子筛介孔数量和比表面积及平均孔径,但因为孔径增大,吸附中心周围阳离子对H2分子的作用减弱,碱处理5A分子筛低分压氢吸附容量并无增加.
参考文献
| [1] | H.Albrecht;E.Hutter .Tritium recovery from an ITER ceramic test blanket module-process options and critical R&D issues[J].Fusion engineering and design,2000(0):769-773. |
| [2] | K.M. Feng;C.H. Pan;G.S. Zhang;D.L. Luo;Z.W. Zhou;Y.W. Yang;X.Y. Wang;G. Hu;T. Yuan;Z. Chen;H.Y. Wang;C.A. Chen;Z.X.Li;Z.Zhao;Z.Q. Li .Preliminary design for a China ITER test blanket module[J].Fusion engineering and design,2006(8/14):1219-1224. |
| [3] | A.A. Garcia Blanco;A.F. Vallone;A. Gil;K. Sapag .A comparative study of various microporous materials to store hydrogen by physical adsorption[J].International journal of hydrogen energy,2012(19):14870-14880. |
| [4] | Willms R S;Taylor D J;Enoeda M et al.Practical-scale tests of cryogenic molecular sieve for separating low-concentration hydrogen isotopes from helium[J].Fusion Engineering and Design,1995,28:386-391. |
| [5] | Xiaojing Qian;Deli Luo;Guoqiang Huang;Xiaojing Song;Weidong Liu .Experimental investigation on cryogenic hydrogen adsorption of molecular sieves[J].Fusion engineering and design,2012(4):359-362. |
| [6] | 赵忠林,李鹏飞,马静红,李瑞丰.凹凸棒土粘结剂对13X分子筛吸附性能的促进作用[J].离子交换与吸附,2008(01):25-32. |
| [7] | 张平萍,陈雪刚,程继鹏,叶瑛.以坡缕石为原料制备方沸石[J].材料科学与工程学报,2010(04):501-504. |
| [8] | Yuying Shu;Ding Ma;Longya Xu;Yide Xu;Xinhe Bao .Methane dehydro-aromatization over Mo/MCM-22 catalysts: a highly selective catalyst for the formation of benzene[J].Catalysis Letters,2000(1/2):67-73. |
| [9] | Yuning Li;Shenglin Liu;Zekai Zhang .Aromatization and isomerization of 1-hexene over alkali-treated HZSM-5 zeolites: Improved reaction stability[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2008(1/2):100-113. |
| [10] | 宋春敏,阎子峰,王槐平,姜杰,乔柯.用碱处理的ZSM-5沸石合成MCM-41型结构复合分子筛的研究[J].中国石油大学学报（自然科学版）,2006(05):113-117. |
| [11] | 李鹏飞 .X型沸石分子筛吸附剂的制备及其吸附性能研究[D].太原理工大学,2007. |
| [12] | 黎水平,吴其胜.煤系高岭土制备碱性分子筛材料[J].材料科学与工程学报,2009(02):233-237. |
| [13] | Chu XZ;Zhou YP;Zhang YZ;Su W;Sun Y;Zhou L .Adsorption of hydrogen isotopes on micro- and mesoporous adsorbents with orderly structure[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2006(45):22596-22600. |
| [14] | Xiao-Zhong Chu;Ji-Ming Xu;Yi-Jiang Zhao .Monolayer Adsorption Behavior of Hydrogen Isotopes on Microporous and Mesoporous Molecular Sieves[J].Journal of Chemical and Engineering Data: the ACS Journal for Data,2010(7):2512-2516. |
| [15] | P. Nachtigall;M. R. Delgado;D. Nachtigallova .The nature of cationic adsorption sites in alkaline zeolites—single, dual and multiple cation sites[J].Physical chemistry chemical physics: PCCP,2012(5):1552-1569. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%