本論文旨在探討以奈米碳管作為甲醇羰基化觸媒的特性，以及用氫氣和水蒸氣在高溫下處理奈米碳管對其活性的影響。所用的奈米碳管以熱化學沈積法製備，使用的溫度為700℃，並以苯為碳源，以Ni/MgO為製備的觸媒。製備時並以碳管成長的時間和溫度，來控制碳管特性。碳管的甲醇羰基化活性則以連續流動的微型反應器測量。
用作觸媒的碳管以穿透式顯微鏡(TEM)，來觀察前處理後觸媒的變化，以程式升溫脫附裝置(TPD)來測量觸媒的表面酸性和甲醇及一氧化碳在觸媒上的吸附情形，以X光繞射儀來分析觸媒的晶相，以美國Quantachrome公司之autosrob-1氣體吸附儀，來測量觸媒的BET表面積、孔徑分布。
鑑定的結果顯示，奈米碳管在600℃下成長最快，在800℃形成的碳管較600℃形成者具較多的不定型碳；另由TEM觀察得知，以高溫的氫氣或水蒸氣處理奈米碳管，可使其管壁變薄，使包覆鎳金屬的碳層的厚度減低，進而增加奈米碳管的甲醇和一氧化碳吸附能力。
由觸媒活性測性可發現，經過氫氣和水蒸氣高溫處理的奈米碳管，其活性明顯大於未經處理者，各碳管的甲醇羰基化活性依甲醇1轉化率的大小為Ni/CNT(氫處理)＞Ni/CNT(水蒸氣處理)＞Ni/CNT(未處理)，依醋酸甲酯選擇率的大小為Ni/CNT(水蒸氣處理)＞Ni/CNT(氫處理)＞Ni/CNT(未處理)；而氫氣和水蒸氣前處理的最佳溫度都在500℃左右；不同成長時間下所獲的奈米碳管，其活性也不同，依甲醇的轉化率大小排序為1HR＞2HR＞3HR＞4HR，但其間差距有限。

The purpose of this research was to explore the properties of carbon nanotubes as a catalyst for the carbonylation of methanol. The effects of hydrogen or steam treatment at high temperature on the activity of the tubes were also studied. The tubes used in this research were prepared by thermal chemical vapor deposition, mainly at 700℃. Benzene was used as the source of carbon. The catalyst for the growth of the tubes was Ni/MgO. The effects of the temperature and the time for the growth were examined in this study.
The carbon nanotubes were characterized by TEM, TPD, XRD, and BET. The results show that the optimum temperature for the growth of the tubes is 600℃. At this temperature, the rate of growth is the highest. The tubes produce at 800℃ have more amorphous carbon than the ones produced at 600℃. The results from TEM analyses tell that treating the tubes at high temperature with hydrogen or steam reduces the wall thickness of the tubes. The treatment can also partially eliminate the carbon layer covering the leading nickel particle, and as a consequence, increasing the ability of the particle to adsorb methanol and carbon monoxide.
The tubes been treated with hydrogen or steam have higher activity in the carbonylation of methanol than those not been treated. The activity may be arranged, according to methanol conversion, in the ordered Ni/CNT(H2 treated)＞Ni/CNT(steam treated)＞Ni/CNT(not treated). The selectivity may also be arranged but in a different order Ni/CNT(steam treated)＞Ni/CNT(H2 treated)＞Ni/CNT(not treated). The optimum temperature of the treatment is 500℃, the same for both the hydrogen and the steam. The growth time of carbon nanotubes also affects the activity of the tubes. The longer the time the lower the activity, but the difference is little.

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