1.Data-processing of Long-term Measurement of Global-background- concentration of Selected Halocarbons from 1988 through 1996 2.Establishment of the Fingerprint Chromatograms of Hydrocarbons' Sources

• Main Authors: Hong, Shih-Yi Larry, 洪士毅
• Other Authors: Jia-Lin Charlie Wang
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/67323887653134534912

碩士 === 國立中央大學 === 化學系 === 85 === 1.鹵碳化物已經被證實會破壞平流層臭氧。鹵碳化物經日照分解產生的鹵 素原子(如氯、溴)將催化平流層臭氧分解的反應，造成臭氧層的破洞，結 果使得太陽的紫外輻射直接照射地表危害人類健康，因此鹵碳化物濃度監 測工作的重要性自不待言。本論文第一部份處理三種鹵碳化物-甲基氯仿 、四氯化碳及CFC-11濃度長期量測的資料，並分析這三種物質在過去幾年 來因為全球性公約特婁議定書的生效所導致濃度變化。 2.行政院環境 保護署已於八十五年四月一日起推動 「以液化石油氣做為計程車替代燃 料的政策」。為了解替代燃料經由洩漏或燃燒對環境帶來的影響，分別對 使用汽油與液化石油氣做為燃料的車輛進行車行排氣採樣及分析。本論文 第二部份將就這兩類車輛排氣成份與對生成近地表臭氧的影響做初步的探 討。 1.Halocarbons have been proven harmful to the stratospheric ozone. The halogens(particularily Cl and Br atoms) produced via photolysis of chlorofluorocarbons(CFCs) will catalyze ozone decomposition reactions leading to stratospheric ozone depletion which results in excessive exposure to stronger solar ultraviolet radiation for all the living species on the surface. Results from long-term measurements of three halocarbons - CCl4, CH3CCl3 and CCl3F(CFC-11) are reported focusing on their concentration changes in the past years after the implementation of the 1987 Montreal protocol and its subsequent amendments. 2.Envrionmental Protection Agency (EPA) of Taiwan has put forward the policy of using liqufied petroleum gas (LPG) as the substituting fuel for taxis since April 1,1996. What impact has it brought to the air quality？ Preliminary comparison between gasoline-fueled and LPG-fueled cars is discussed in the second part of this work.