製備奈米金觸媒薄膜微型反應器進行一氧化碳轉化之研究

Fabrication and Characterization of the Membrane-based Au/TiO2 Microreactor for Oxidative Conversion of Carbon Monoxide

邱顯隆(Hsien-Lung Chiu)

指導教授 ： 楊重光

共同指導教授 ： 陳建中(Chien-Chung Chen)

國立臺北科技大學/工程學院/化學工程研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00865

摘要

微反應器提供數多製程上的優勢，對於化學工程、製藥產業甚至生物科技。由於具有高體積單位的比表面積，使其提升反應速率。本實驗利用本實驗利用光還原法(photo-deposition)製備出奈米金觸媒和電紡技術(electrospinning)製備出高順向性微管陣列薄膜(Microtube Array Membrane, MTAM)。利用含浸法(Impregnation)將奈米金觸媒以不同的重量沉積在MTAM中，並組裝出薄膜型微反應器(membrane-based microreactor, MMR)，並用X光繞射儀(XRD)、掃描式電子顯微鏡(SEM)、X光能譜分析儀(EDX)、穿透式電子顯微鏡(TEM)和氣相層析儀(GC)來鑑定觸媒和定量分析。根據Langmuir-Hinshelwood 方程式可求得知，MMR管內的奈米金觸媒重量為25毫克時，具有最佳反應性。在相同條件下，奈米金觸媒沉積在MMR的反應性高於薄膜的反應。在室溫下的長期試驗，串聯的MMR可提供穩定的觸媒活性且CO轉化率可維持在17 ± 2%。

關鍵字

一氧化碳氧化 ； 光觸媒 ； 微管陣列薄膜 ； 微反應器 ； 微結構反應器 ； 氣相微反應器

並列摘要

Microreactors offer numerous advantageous process in fields of chemical engineering, pharmacy, medicine and biotechnology, due to their large area to volume ratio, consequently, higher reaction/conversion rate. In this study, novel membrane-based microreactor (MMR) of Au/TiO2 was prepared by coating the Au/TiO2 nanoparticles on the inner wall of the electrospun PLLA (poly-L-lactide) Microtube Array Membrane (MTAM). These MMRs were then characterized and evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and gas chromatography (GC). Based on Langmuir-Hinshelwood equation, the 25 mg Au/TiO2 deposited into MMR that provided the optimum catalytic activity. Under identical conditions, the reactive performance of Au/TiO2 inside MMR also higher than thin film. For long-term test, MMR in series module remained the catalytic stability and the maximum CO conversion ratio was 17 ± 2% at room temperature.

並列關鍵字

CO oxidation ； photo-catalyst ； microtube array membrane ； microreactor ； microstructured reactor ； gas phase microreactor

參考文獻

98. P.-Y. Lin, A study of CO oxidation on gold nanocatalysts prepared by photo-deposition method, Master Thesis, National Taipei University of Technology, Taipei, Taiwan, 2012.

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