采用化学镀方法在非对称氧化铝管状载体上制备出3μm厚的Pd59Cu41(质量分数,%)合金复合膜.考察了合金膜在473～953 K间的氢气渗透性能.在高于873 K和低于723 K温度区间内,氢气渗透都遵循单一的Arrhenius方程,活化能分别为30.0和9.8 kJ/mol.在723～873 K温度区间内,氢气渗透量随温度降低而增加的现象说明此时晶体结构为fcc和bcc的混合相,并且晶体结构正逐渐从fcc相向bcc相转变.0.5的压力指数说明在473～873 K温度区间内氢气扩散都遵循Sievert's方程.合金膜的厚度,组成和晶体结构分别用SEM,EDS和XRD进行表征.
参考文献
| [1] | Dittmeyer R;H(o)llein V;Daub K .Membrane reactors for hydrogenation and dehydrogenation processes based on supported paltadium[J].Journal of Molecular Catalysis A:Chemical,2001,173:135-184. |
| [2] | Uemiya S;Seto N;Ando H .Separation of hydrogen through palladium thin film supported on a porous glass tube[J].Journal of Membrane Science,1991,56:303-313. |
| [3] | McKinley D L .Method for H2 separation and purification[P].US 3350845,1969-04-22. |
| [4] | Morreale BD;Ciocco MV;Howard BH;Killmeyer RP;Cugini A;Enick RM .Effect of hydrogen-sulfide on the hydrogen permeance of palladium-copper alloys at elevated temperatures[J].Journal of Membrane Science,2004(2):219-224. |
| [5] | Shu J;Grandjean B;Neste V .Catalytic palladium-based membrane reactors:a review[J].Canadian Journal of Chemical Engineering,1991,69:1036-1060. |
| [6] | Knapton A G .Palladium alloys for hydrogen diffusion membranes[J].Platinum Metals Review,1977,21:44-50. |
| [7] | Li A;Liang W;Hughes R .Fabrication of defect-free Pd/α-Al2O3 composite membranes for hydrogen separation[J].Thin Solid Films,1999,350:106-112. |
| [8] | Tong J;Su C;Kuraoka K .Prepation of thin Pd membrahe on CeO2-modified porous metal by a combined method of dectroless plating and chemical vapor deposition[J].Journal of Membrane Science,2006,269:101-108. |
| [9] | Pan X L;Xioug G X;Sheug S S.Thin dense Pd membranes suported on α-Al2O3 hollow fibers[J].Chemical Communications,2001:2536-2537. |
| [10] | Fernando Roa;J.Douglas Way;Robert L.McCormick .Preparation and characterization of Pd-Cu composite membranes for hydrogen separation[J].Chemical Engineering Journal,2003(1):11-22. |
| [11] | Pan X L;Kilgus M;Goldbach A .Low-temperature H2 and N2 transport thigh thin Pd66 Cu34 Hx layers[J].Catalysis Today,2005,104:225-230. |
| [12] | 徐恒泳;侯守福;李文钊 等.一种复合金属钯膜或合金钯膜及其制备方法[P].CN 200410021025.6,2005-07-20. |
| [13] | Zhang J;Xu HY;Li WZ .High-purity COx-free H-2 generation from NH3 via the ultra permeable and highly selective Pd membranes[J].Journal of Membrane Science,2006(1/2):85-93. |
| [14] | Taylor R .Transformations in the copper-palladium alloys[J].Journal of the Institute of Metals,1934,54:255-273. |
| [15] | Ward T L;Dao T .Model of hyarogen permeation behavior in palladium membranes[J].Journal of Membrane Science,1999,153:211-231. |
| [16] | Burch R;Buss R G .Pressure-composition isotherms in the palladium-copper-hydrogen system[J].Solid State Communications,1974,15:407-409. |
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%