摘要
研究了ZrO2-CaO-Al2O3膜催化剂的制备方法、表征及其对甲烷选挥性氧化的催化活性。在T=350℃、CH4GHV=9000h-1、O2流速50ml/min的较佳条件下,甲醇和甲醛的总选择性可达96%以上。SolGel法制成的膜,微结构均称,有一定的致密性,能够控制O2的渗透并使之活化成为选择性氧化用氧种,经SEM表征结构完整。研究了制膜性能的影响因素。
The preparation and characterization of membranes ZrO_2-CaO-Al_2O_3 and their catalytic activity for selective oxidation of methane were studied. Total selectivity to methanol and formal dehyde was over 96% at 350℃,GHSV of CH_4:9000h^(-1), flow velocity of O_2:50ml/min. The synthetic membranes prepared via Sol-Gel method exhibit well distributed micro-structure,permit selective permeation of O_2 and activate it into oxygen species for selective oxidation. The structural characterization was taken by SEM (scanning electron microscopy). Some factors affecting membrane properties were also studied.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
1993年第3期3-9,共7页
Natural Gas Chemical Industry
关键词
膜催化剂
甲烷
选择性氧化
甲醇
membrane catalyst
Sol-Gel method
ZrO_2 membrane
selective oxidation of methane
