Development of continuous rapid measurements of carbon stable isotpe of carbon gases

2015 Fiscal Year Final Research Report

• Project/Area Number: 25550021
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute for Agro-Environmental Sciences
• Principal Investigator: Yonemura Seiichiro 国立研究開発法人 農業環境技術研究所, 大気環境研究領域, 主任研究員 (20354128)
• Co-Investigator(Kenkyū-buntansha): KODAMA Naomi 兵庫県立大学, 研究員 (60594611) ; TOKIDA Takeshi (国)農業環境技術研究所, 物質循環研究領域, 任期付研究員 (20585856)
• Co-Investigator(Renkei-kenkyūsha): WADA Ryuichi 帝京科学大学, 生命環境学部, 准教授 (90566803) ; MATSUMI Yutaka 名古屋大学, 宇宙地球環境研究所, 教授 (30209605)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 同位体比 / 二酸化炭素 / メタン / 一酸化炭素 / レーザー

Outline of Final Research Achievements

To be available for continuous measurements of CH4 and CO stable carbon isotope, we conducted technical developments. At first, we developed technique to completely oxidize CH4 using hand-made Ni catalyzers by steam reforming. We confirmed selective oxidation of CO by Hopkalite and tested performance of Pt catalyzers. Using the three catalyzers, it became possible to selectively analyze stable carbon isotope ratios of CO2, CO, and other carbon gases (mainly CH4). Because low emission of carbon gases such as CO and CH4 is expected in ecosystem studies, optical lengths of Aerodyne CO2 stable isotope laser spectroscopy was prolonged from 7.2m to 36m. It was achieved that detection level of CO2 by the laser spectroscopy was improved from 100ppm to 20ppm.

Free Research Field

環境学