文章信息/Info

Title:

Influence of Methane on Hydrogen Permeation Pd Alloy Membrane in High Temperature and High Pressure

文章編號:

1674-3962(2020)12-0981-05

作者:

李亞寧1; 李廣忠1; 王建忠1; 任常弈凡2; 金輝2; 郭烈錦2

（1.西北有色金屬研究院 金屬多孔材料國家重點實驗室，陜西 西安 710016）（2.西安交通大學(xué) 動力工程多相流國家重點實驗室，陜西 西安 710049）

Author(s):

LI Yaning1;  LI Guangzhong1;  WANG Jianzhong1;  REN Changyifan2;  JIN Hui2;  GUO Liejin2

(1. State Key Laboratory of Porous Metals Materials, Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China) (2. State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong Univeristy, Xi’an 710049, China)

關(guān)鍵詞:

甲烷; 鈀合金膜; 高溫高壓; 影響

Keywords:

methane;  Pd alloy membrane;  high temperature and high pressure;  influence

分類號:

TG146.3+6；TQ028.8

DOI:

10.7502/j.issn.1674-3962.202008019

文獻標(biāo)志碼:

A

摘要:

以多元鈀（Pd）合金膜為研究對象，在H2+0.1%CH4（體積分?jǐn)?shù)）混合氣體中進行靜態(tài)透氫實驗。研究了高溫（450，550，650 ℃）和高壓（1，10 MPa）下CH4氣體對Pd合金膜的影響。采用SEM、金相顯微鏡、XPS對與CH4作用前后的Pd合金膜的表面形貌、微觀組織和表面狀態(tài)進行了表征與分析。結(jié)果表明，與CH4作用后Pd合金膜的質(zhì)量仍保持穩(wěn)定，微觀形貌沒有變化。XPS結(jié)果表明CH4在高溫高壓下對Pd合金膜的表面化學(xué)狀態(tài)也沒有影響，高溫高壓下CH4既未發(fā)生碳化生成碳化物也未發(fā)生分解，碳單質(zhì)是通過表面吸附在Pd合金膜表面以—CH—鍵的方式存在。與低溫低壓條件相比，高溫高壓下CH4分子與H2分子在Pd合金膜表面的競爭吸附很弱，Pd合金膜的CH4吸附量很少，可以忽略。

Abstract:

In this paper, static hydrogen permeation experiment of multicomponent palladium （Pd） alloy membranes was investigated in hydrogen gas with the presence of 0.1vol% methane gas. The influences of methane gas on Pd alloy membranes at high temperatures (450, 550, and 650 ℃) and high pressures (1, 10 MPa) were studied. Surface morphologies, microstructures and surface states of Pd alloy membranes were characterized and analyzed by SEM, metallurgical microscope and XPS. The results show that the quality of Pd alloy membrane is almost unchanged after being exposed in hydrogen gas with the presence of 0��1% methane gas. Furthermore, there is no variation on the surface morphology of Pd alloy membranes. XPS analysis shows that methane gas has no effect on the surface chemical state of Pd alloy membrane. Characterization peak of either carbides or decomposition was not observed. Carbon is adsorbed on the surface of Pd alloy membrane existing in the form of —CH—. Compared with low temperature and low pressure condition, there is a little methane gas absorbed on the surface of Pd alloy membrane under high temperature and high pressure. It might result from that the competitive adsorption between methane and hydrogen on the surface of Pd alloy membrane at high temperature and high pressure is very weak, which could be ignored.