摘要
本文基于钇稳定氧化锆(YSZ)基极限电流型氧传感器提出一种新型的甲烷(CH4)传感器检测方案,搭建了与传感器工作过程相同的模拟工作系统,并通过该模拟工作系统验证了检测方案的可行性:制备了负载钯(Pd)的钠型分子筛(Pd/NaLa-ZSM—5)催化剂用以催化CH4。通过YSZ基极限电流型氧传感器,测量CH4催化燃烧前后混气中氧气(O_(2))浓度变化带来的极限电流差值,从而反推计算得到CH4浓度。实验结果显示:当催化剂反应温度达到350℃及以上时,该模拟工作系统的灵敏度不低于266.79 nA/10^(-6),所测得的CH4浓度与O_(2)传感器极限电流差值(ΔI)有较好的线性度(R2=0.999),且具有良好的选择性与重复性。该检测方案对于开发天然气内燃机高温环境中的CH4传感器具有很好的指导意义。
A novel methane(CH4)sensor detection scheme is proposed based on the yttria-stabilized zirconia(YSZ)-based limiting current type oxygen sensor.A simulated working system with the same working process as the sensor is built,and the feasibility of the detection scheme is verified through the system:A palladium(Pd)loaded molecular zeolite(Pd/NaLa-ZSM—5)catalyst is prepared to catalyze CH4.The limiting current difference caused by the change of oxygen(O_(2))concentration in the mixture before and after CH4 catalytic combustion is measured by YSZ-based limiting current type oxygen sensor,and the CH4 concentration is calculated by inverse calculation.The experimental results show that when the reaction temperature of the catalyst reaches 350℃ or above,the sensitivity of the system is not less than 266.79 nA/10^(-6),and the measured CH4 concentration and oxygen sensor limit current difference(ΔI)has high linearity(R^(2)=0.999),and has good selectivity and repeatability.These results show that the detection scheme has a good guiding significance for the development of CH4 sensors in high-temperature environment of natural gas combustion engine.
作者
王宁
钱显威
程振乾
夏继宏
邹杰
简家文
WANG Ning;QIAN Xianwei;CHENG Zhenqian;XIA Jihong;ZOU Jie;JIAN Jiawen(College of Information Science and Engineering,Ningbo University,Ningbo 315211,China;The 49th Research Institute of China Electronics Technology Group Corporation,Harbin 150028,China;School of Electronic and Information Engineering,Chongqing University of Arts and Sciences,Chongqing 400000,China)
出处
《传感器与微系统》
北大核心
2025年第12期69-72,77,共5页
Transducer and Microsystem Technologies
基金
国家自然科学基金面上项目(61971251)
浙江省基础公益研究计划项目(LGG22F010017)
宁波市重点研发计划项目(2022Z093,2022Z092)
重庆市自然科学基金资助项目(CSTB2023NSCQ-LZX0045)。
关键词
甲烷传感器
催化燃烧
极限电流
氧气浓度变化
CH4 sensor
catalytic combustion
limiting current
O_(2)concentration change
