甲烷化氢火焰离子化检测器专用微型转化炉的研制  

Fabrication of a micro converter with nickel catalyst used for methanation-flame ionization detector

作　　者：林琳 张绮纯 

机构地区：[1]深圳市龙岗区环境监测站,广东深圳518172

出　　处：《分析仪器》2010年第3期15-17,共3页Analytical Instrumentation

摘　　要：制作了一种目前属国内先进的微型转化炉。转化炉由大口径玻璃毛细管或金属管制成。将一定粒度的Ni触媒与Al(OH)3溶胶混合,形成较稳定的悬浮液,用动态法将悬浮液涂渍在管内壁上,形成均匀的Ni触媒涂层,经过老化即可使用。当一氧化碳、二氧化碳加氢通过该管时,在一定的转化温度下,一氧化碳、二氧化碳会转化成甲烷被气相色谱-氢火焰离子化检测器检测。甲烷化微型转化炉转化率达到95%以上,一氧化碳、二氧化碳的最小检测量为5μg/g。A micro converter with nickel catalyst is fabricated. The converter is made of wide bore glass capillary or metal tube. The nickel catalyst is mixed with Al（OH）3 sol, forming a relatively stable suspension. The suspension is coated on the inner wall of the tube using dynamic coating method to form a uniform nickel catalyst coating. The micro converter is ready for use after aging. When carbon monoxide or carbon dioxide plus hydrogen passes through the converter, they will be converted into methane under certain temperature, thus can be detected by gas chromatography with flame ionization detector. The methane conversion ratio is higher than 95 %. The minimum detection limits of carbon monoxide and carbon dioxide are 5μg/g.

关 键 词：微型转化炉 Al(OH)3溶胶 涂渍 转化率 Ni触媒 气相色谱 氢火焰离子化检测器 

分 类 号：O652.2[理学—分析化学]