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年度	107	專案性質	實驗性質
專案類別	研究專案	研究主題	整治
申請機構	中原大學	申請系所	中原大學環境工程學系
專案主持人	游勝傑	職等/職稱	教 授
專案中文名稱	開發可降解 SVE 尾氣之低能耗可見光催化商業模組
中文關鍵字	SVE尾氣、可見光、光催化、商業模組
專案英文名稱	Development of a low-energy and visible-light-driven photocatalytic commercial module for degradation of SVE exhaust
英文關鍵字	SVE exhaust, Visible light, photocatalysis, Commercial module
執行金額	1,120,000元
執行期間	2018/1/10 至 2018/11/30
計畫中文摘要	當土壤受到油氣污染時多以氣體抽除法進行整治，該法為防止土壤氣體污染氣體直接排放進入大氣環境，抽出之氣體經由管線至尾氣處理設備，經活性炭處理後排放，以確保排放符合氣體標準，該尾氣處理方式需要添加活性碳吸附劑。因此，本計畫擬發展利用可見光催化劑將SVE法尾氣進行催化降解，並將殘存的尾氣再透過活性碳進行吸附。由於使用“可見光催化催化+吸附膜組”，既較一般光催化劑節省能源，又減少傳統方法對大量活性炭的依賴，大大降低了尾氣處理之成本，降低空氣污染風險。 107年下半年，本團隊完成了光催化劑之各項參數實驗，透過改變不同的濕度及光源以將本團隊所開發之La-TiO2光催化劑提高至最佳效率，結果顯示不同的濕度對於La-TiO2去除甲苯效率有顯著的影響，當環境濕度為60%時甲苯之去除率可達到23.21%，此結果是由於水分子會以化學吸附之方式吸附於La-TiO2之活性點位上，因此可進一步解離成氫氧自由基，但當環境濕度過高時反而會使La-TiO2對甲苯去除效率下降，在環境濕度80%時甲去除率僅剩18.8%，其原因為過多的水分子會導致甲苯在被光催化劑降解前先行與水分子進行化學反應，最終附著於La-TiO2表面造成降解效果之下降。 本團隊也針對商業化模組進行了成本估算，以光催化模組使用4片玻璃纖維棉作為光催化劑載體及吸附模組使用10g之活性碳進行估算，本商業化模組去除1g甲苯之成本約為2,005元，雖然本研究之商業化模組成本較高，但根據實驗結果顯示本商業化模組能長時間持續使用，因此本商業化模組應用於實際場址之污染整治是可行的。
計畫英文摘要	At present, soil vapor extraction (SVE) has been widely applied as an in-situ remediation of groundwater contaminated by petroleum hydrocarbon. In order to prevent the emission of contaminated gas, the pumped polluted gases were adsorbed by activated carbon at tail gas treatment unit before their release in the atmosphere, which prevents the pollutant gases being discharged directly into the atmosphere. However, it is feasible to use activated carbon in SVE method, because of its expensive cost, adsorption oversaturation problem and high-energy consumption. In our study, it is planned to develop the use of visible-light-driven catalyst to degrade toluene of SVE process, and then the remaining exhaust gas will be adsorbed through activated carbon. Due to the use of the“photocatalysis modual+ adsorption modual”, compared with the general photocatalyst, it not only saves energy, but also reduces the amount of activated carbon in the traditional method. It greatly reduces the cost of exhaust gas treatment and the risk of air pollution. In the second half of 107 years, we completed the preparation of the adsorption module, which was used for adsorption of the residual exhaust gas completely after photocatalysis module. The adsorption efficiency of toluene with different weight of activated carbon was studied. The results showed that the amount of activated carbon in different layers could effectively adsorb toluene gas in the adsorption module. In order to further clarify the removal efficiency of toluene when the photocatalytic module is combined with the adsorptive module, toluene removal tests were carried out on the photocatalytic module and the adsorptive module. The test results showed that the removal efficiency of toluene in visible light was 80% with two modules, which is 35% higher than photocatalytic modules alone in visible light. Moreover, no deactivation occurred after two hours. Therefore, the above results prove the feasibility of combining the two modules.Then, the performance of the module under ultraviolet light will be tested. It is estimated that when the catalytic module is combined with 5g activated carbon module, the removal efficiency of toluene can reach more than 95%.