PREPARATION OF PALLADIUM SILVER ALLOY MEMBRANES FOR HYDROGEN SEPARATION BY THE SPRAY PYROLYSIS METHOD

被引：108

作者：

LI, ZY

MAEDA, H

KUSAKABE, K

MOROOKA, S

ANZAI, H

AKIYAMA, S

机构：

[1] KYUSHU UNIV,DEPT CHEM SCI & TECHNOL,6-10-1 HAKOZAKI,HIGASHI KU,FUKUOKA 812,JAPAN

[2] NOK CORP,FUJISAWA 251,JAPAN

来源：

JOURNAL OF MEMBRANE SCIENCE | 1993年 / 78卷 / 03期

关键词：

SPRAY PYROLYSIS; PALLADIUM SILVER ALLOY MEMBRANES; GAS PERMEATION; SEPARATION OF HYDROGEN NITROGEN;

D O I：

10.1016/0376-7388(93)80004-H

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A Pd-Ag alloy membrane is formed on the outer surface of a porous alumina hollow-fiber support by spray pyrolysis of a Pd (NO3) 2 and AgNO3 solutiOn in a H-2-O2 flame. The mass fraction of silver in the membrane obtained at a support-surface temperature of 1240-1340 K is as low as 0.04, while its fraction in the total metal mass dissolved in the spray solution is 0.1-0.4. This is explained by the higher partial pressure of silver compared to that of palladium. An additional spray pyrolysis with a silver nitrate solution provides a proper silver content in the alloy membrane. The thickness of the alloy membrane is 1.5-2 mum, and the separation factor of hydrogen to nitrogen is about 24 at 773 K. The membrane surface is observed by high-resolution SEM, and the evolution of the morphology is discussed from the view of the deposition mechanism.

引用

页码：247 / 254

页数：8

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