BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ)膜反应器还原侧表面反应机理  

Reaction Mechanics on Anode Surface of BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ) Membrane Reactor

作　　者：沈培俊[1] 丁伟中[1] 张玉文[1] 周宇鼎[1] 杨志彬[1] 秦国利[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《高等学校化学学报》2009年第1期152-158,共7页Chemical Journal of Chinese Universities

基　　金：国家"八六三"计划(批准号:2006AA11A189);上海市科委重点科研项目(批准号:06DZ12212);先进钢铁材料技术国家工程研究中心项目(批准号:中050209)资助

摘　　要：研究了BaCo0.7Fe0.2Nb0.1O3-δ(BCFN)透氧膜反应器还原侧表面反应机理,分析了表面催化微粒及催化床对膜反应器的作用.提出了"催化解离机制"是构成甲烷重整BCFN膜反应器透氧量上升的主要原因;CH4,H2及CO在BCFN膜表面的反应活性依次为H2>CO>CH4;当CH4气氛中加入H2或CO时,BCFN膜表面的主要发生由CH4直接氧化转变H2或CO的氧化反应,同时极大提升了BCFN膜反应器的透氧量;BCFN膜表面氧化反应为"晶格氧"氧化反应模式主导.The reaction mechanism on anode surface of membrane reactor was studied and proposed. The effects of catalyst micron on anode surface and catalyst-bed in membrane reactor were concluded. The ＂Catalystic dissociation mechanism＂ was proposed as the main reason for the increment of oxygen permeation in CH4-reforming membrane reactor; the reactive activity sequence of compositions on membrane surface was H2 〉 CO 〉 CH4 ; the main reaction on anode surface would turned into oxidation of H2 or CO from directly oxidation of CH4 and the oxygen permeation of membrane would be significantly increased as soon as the H2 or CO was added into CH4 gas; and the ＂lattice-oxygen-ion pattern＂ dominate the oxidated reaction on the membrane surface.

关 键 词：BaCo0.7Fe0.2Nb0.1O3-δ 膜反应器 表面反应机理 晶格氧 

分 类 号：O643.3[理学—物理化学]