清潔發展機制（CDM）的推動是做為達成“京都議定書”的目標一項關鍵的課題。清潔發展機制的創建提供符合成本效益的溫室氣體減排機會，並促進已開發國家和開發中國家達成可持續發展的共同目標。 甲烷為溫室氣體（GHG）之一種，儲存在煤層內，從地下開採煤礦作業中，其大量的甲烷氣體量將被釋放到大氣中。在進行採礦工作時，如果瓦斯濃度達到5％以上，瓦斯非常容易在空氣中爆炸，礦井必須確保礦井內甲烷濃度低於爆炸下限。這必須透過使用大體積的通風系統，來稀釋來自礦井中的甲烷。雖然通風系統排出空氣中的甲烷濃度相當低（<1％），但是礦井中空氣通風系統所排出的空氣量則非常龐大，造成了全球最大的煤礦井下甲烷排放源。全球前五大排放量的國家(China, US, Ukraine, Australia, Russia)其煤礦通風瓦斯(VAM)排放量佔了全球75%以上。 甲烷的全球暖化潛能(GWP)是同等重量的二氧化碳的21倍，每年全球前五大排放量的國家，其VAM排放相當於超過225萬t的CO2，或全球煤礦瓦斯（CMM）排放量的約38％。在2010年，全球甲烷排放量從煤礦估計約5.84億噸二氧化碳當量，佔全球甲烷總排放量的8％。 本篇論文以煤礦通風瓦斯為例，探討CDM的可行性。研究結果顯示：燃料價格、電力價格以及CER價格，為此專案項目的財務分析關鍵因子。 Reform of the Clean Development Mechanism (CDM) is a key issue in advancing the objectives of the Kyoto Protocol. The CDM was created with the mutual objectives of providing cost-effective abatement opportunities for industrialized countries and to advance sustainable development in developing countries.Methane, a powerful greenhouse gas (GHG), is often found in coal seams and significant quantities of methane gas can be released into underground mine workings as part of coalmining operations. Because concentrations above 5% are explosive in air, mines must ensure that methane does not build to dangerous levels within the mine. This is accomplished in part through the use of large-volume ventilation air systems。that dilute and remove methane from the mine. Although the concentration of exhausted methane in ventilation air is quite low (typically <1%), the volume of mine air that ventilation systems move is so great that they actually constitute the largest global source of methane emissions from underground coal mines. Five countries make up over 75% of ventilation air methane (VAM) emissions。Having a global warming potential of 21 times greater than an equivalent weight of CO2, the annual VAM emissions from these five countries is equivalent to over 225 million t of CO2, or approximately 38% of global coal mine methane (CMM) emissions. In 2010, global methane emissions from coal mines were estimated to be approximately 584 million t of CO2 equivalent, accounting for 8% of total global methane emissions.The purporse of this thesis is to study the availability of CDM under the case of VAM. The research results show that the prices of fuel, electricity, and CER are the three key factors that affect the performance under the application of the CDM.
