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TW200819387A - Micro-reacting device having a micro-channel flow-guiding block - Google Patents

Micro-reacting device having a micro-channel flow-guiding block Download PDF

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TW200819387A
TW200819387A TW095138634A TW95138634A TW200819387A TW 200819387 A TW200819387 A TW 200819387A TW 095138634 A TW095138634 A TW 095138634A TW 95138634 A TW95138634 A TW 95138634A TW 200819387 A TW200819387 A TW 200819387A
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micro
fluid
flow
catalyst
gas
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TW095138634A
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TWI300401B (zh
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Chi-Yuan Lee
Shuo-Ren Li
Jin-Hua Wu
Guan-Wei Wu
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Univ Yuan Ze
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Priority to US11/896,501 priority patent/US7846398B2/en
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  • Combustion & Propulsion (AREA)
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Description

200819387 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種具有微流道導流塊之微反應裝置，其兼 具將流體直接導向觸媒部而提高整體效率、在流道中可產生擾 流而更能充份混合以及結構簡單等優點。 【先前技術】 燃料電池一直是低環境污染且高效率的發電方法，燃料電 池之種類很多，但主要是以氫及氧為燃料。然而，若應用於一 般之車輛，如何在車輛上儲存氫及氧也是一大問題。目前常用 之方法是利用曱醇蒸氣重組法（steain reforming methonal，簡稱SRM)，來產生氫氣，其主要化學反應表示如 下： ---⑴ ——(2) ——-⑶ CH30H-hH20<r^C02 -h3H2 CH3OH ^2H2 -tCO------
CO + H2〇^c〇2^H2 —— 其认’甲醇条氣重組法中必須利用觸媒以及加熱至一可使 觸媒反應之溫度，所以，有關反應室之流道設計、如何加熱、 溫度控制、觸媒之選擇、觸媒之分佈等等，均是學界及業界關 心之議題。 然而，請參閱第一、第二及第三圖，習知的甲醇蒸氣重組 器主要包括： 弟一氣體流道810 ’其具有一第一入口 811、一第一出 5 200819387 口 812 ; 一第二氣體流道820，其具有一第二入口 821、一第二出 口 822 ; 一觸媒反應部830，其具有複數個微通道831及觸媒膜 832 ’其用以連通該第一氣體流道與該第二氣體流道。 當然’也可在該第一氣體流道810之壁面之預定位置處裝 a又或塗佈特定之觸媒層（例如氧化鋅）9〇 ’如第二及第三圖所 示’但在第一圖中省略未示。 如前所述，參閱第三圖，當流體流經該第一氣體流道810 時，通常只是平順的流過，所以，流體能接觸到觸媒層（例如 氧化鋅）90之機率較低，自然，整體之反應速率較慢，進而使 得整個微反應器之效率不佳。 其次，以上述之第⑶化學式而言，CO與Μ之混合程度 越高，則反應出之產物氫氣也越多。但是，由於習知結構中之 流逼内的流體在流動時並無阻礙，所以大體上是以層流的型態 //IL過，並無擾動之現象，故，流體内之不同氣體之混合情形較 差’化學反應的結果也不佳。 因此，有必要研發新技術，以解決上述缺弊。 【發明内容】 本發明之主要目的，在於提供一種具有微流道導流塊之微 反應衣置，其可將流體直接導向觸媒部而提高整體效率。 本發明之次一目的，在於提供一種具有微流道導流塊之微 6 200819387 反應裝置’其使流體在流道巾可產生擾流而更能充份混合。 本發明之又一目的，在於提供一種具有微流道導流塊之微 反應裝置，其結構簡單。 本發明係提供一種具有微流道導流塊之微反應裝置，其包 括： 一第一氣體流道，係至少具有一第一入口及一第一出口， 且該第一氣體流道上設有複數個導流部； 一第二氣體流道，係至少具有一第二入口及一第二出口； 一觸媒反應部，係至少具有複數微通道及觸媒膜，其用以 連通該第一氣體流道與該第二氣體流道·， 其中，母一導流部具有至少一導流塊、至少一流體撞擊凹 4及至少一觸媒部，該導流塊係將流體導引至該流體撞擊凹部 上之觸媒部的方向，用以提高流體與觸媒部接觸及反應的機 〇 本發明之上述目的與優點，不難從下述所選用實施例之詳 細說明與附圖中，獲得深入瞭解。 茲以下列實施例並配合圖式詳細說明本發明於後·· 【實施方式】 芩閱第四、第五及第六圖，本發明係為一種『具有微流道 導流塊之微反應裝置』，其包括： 一第一氣體流道10，其具有一第一入口 U、一第一出口 12，且該第一氣體流道10上設有複數個導流部13 ; 7 200819387 一弟^一氣體流道20 ’其具有一第二入口 21及一第二出口 22 ； 一觸媒反應部30，其具有複數微通道31及觸媒膜32，該 觸媒反應部30係用以連通該第一氣體流道10與該第二氣體流 道20 ; 其中，每一導流部13皆具有至少一導流塊131、至少一 流體撞擊凹部132及至少一觸媒部133，該導流塊131係用以 將一流體導引至該流體撞擊凹部132上之觸媒部133之方向， 用以提高該流體與該觸媒部133接觸及反應之機率。 如此為本發明之具有微流道導流塊之微反應裝置。 貝務上’如第五及第六圖所示，該導流塊131係具有兩導 飢面131A ’ &兩個導流面丨似能導引流體平均朝兩旁概呈矩
第七，V丨、厂怖形、橢圓形、 二角形（如第六圖所示）、半圓形（如 3形、多邊形（如第八圖所示）其中之 該觸媒部133係選自銅、氧化鋅、
33及複數個加熱元件34，
上又設有複數個感知器 複數個感知B 33係用以感應該 該第一 200819387 氣體流道10、該第二氣體流道2〇與該觸媒反應部3〇上的溫 度/C〇合1 ’藉由感應到預定數值，控制該加熱元件34啟/閉， 以保持销-氣體流道1Q、該第二氣體流道2()與該觸媒反應 部30上的最佳溫度/ C0含量。 更詳細的講，燃料電池是低環境污染且高效率的發電方 法’其主要以氫及氧為燃料混合發電。氧氣原則上可以從大氣 中直接擷取，而氫氣則是在燃料電池内以不同的元素（也可以 講是氣體)透過甲醇蒸氣重組法（目前最常見的)取得。 如第五圖所示，為取得氫氣，本發明於燃料電池的流道(假 叹為第-氣體流道10)内預定位置處設置導流塊131，該導流 塊131上具有兩個導流面131A，這兩個導流面131八使該流體 κ動方向平均的朝兩個流體撞擊凹部分散開，並分別朝 糊媒部m去，據以提高越與細綱133接觸並反應 之機率。 同日守，由於流體在流動時被導流塊阻擋，所以會改變流動 之方向’在改變時有可能產生擾動，使得流體内之各氣體更充 份的混合，.因此，也可朗紐之化學反應結果。 —貫務上，該導流部13之流體撞擊凹部132係可為波浪狀 (如第九圖所示）、雙邊内縮狹道狀(如第十圖所示的〔〕形）、 雙邊對稱彎角狀(如第十一圖所示的〈〉形)或是雙邊對稱圓弧 狀（如弟十一圖所示的（）形）。 200819387 本發明之優點及功效如下所述： [1] 將流體直接導向觸媒部而提高整體效率。本創作在流 道預定位置設置複數個導流部，每一導流部都設一導流塊將流 體直接導向流體撞擊凹部上的觸媒部，可以算是強制流體在導 流部内與觸媒部接觸，提高整體效率。 [2] 在流道中可產生擾流而更能充份混合。流體在被導流 塊導向流體撞擊凹部上的觸媒部的同時，因為流動方向改變 了，所以也可能產生擾流而更充份混合，如此與觸媒部接觸 時’能產生更佳的化學反應。 [3] 結構簡單。本發明之導流部係直接成型於流道的預定 部位，製作容易，結構簡單，且重點是效果明顯。 、 以上僅是勤較佳實_詳細朗本㈣，對於該實施例 雌的任何f轉狀·，皆不獅本㈣讀神與範圍。 =以上抽明，可使熟知本微藝相瞭本發明的確可 達成前述目的’實已符合專利法之規定，爰提出發日轉利申請。 200819387 【圖式簡單說明】 弟圖係習用結構之分解示意圖 第二圖係第-圖之剖視之示意圖 第二圖係習用結構之局部放大剖視之示意圖 第四圖係本發明之分解示意圖 第五圖係第四圖之部分結構之局部放大之示意圖 第六圖係本發明之部分結構之放大示意圖
第七圖係本發0月之部分結構之其他實施例之示意圖- 第八圖係本發明之部分結構之其他實施例之示意圖二 第九圖係本發明之流體撞擊凹部之實施例之示意圖一 第十圖係本㈣之流體郷凹部之實補之示意圖二 第十一圖係本伽之流難擊m卩之實_之示意圖三 第十二_本發明之流體縣凹部之實糊之示意圖四 【主要70件符號說明】 η、8ΐι 第一入口 13導流部 131Α導流面 133觸媒部 21、821 第二入口 30、830觸媒反應部 32、832觸媒膜 34加熱元件 10、810第一氣體流道 12、812 第一出口 131導流塊 132流體撞擊凹部 20、820第二氣體流道 22、822 第二出 口 31、831微通道 90觸媒層 33感知器

Claims (1)

  1. 200819387 十、申請專利範圍： 1·一種具有微流道導流塊之微反應裝置，其包括： -第-氣體流道，係至少具有_第^人口及一第一出 口，且該帛-氣财道上設有複數鱗流部； 一第二氣體流道，係至少具有-第二人π及-第二出口； -觸媒反應部，叙少具有複數微通道及觸膜，其用 以連通该第-氣體流道與該第二氣體流道； • 射，每—導流部具有至少-導流塊、至少-流體撞擊 凹部及至少-觸媒部，該導流塊係將流體導引至該流體撞 擊凹部上之職部的方向’用以提高流體與觸媒部接觸及 反應的機率。 2·如申請專利範圍第 1項所之具有财道導流塊之微反應裝 置，其中Z 該流體撞擊凹部係概呈—矩形凹部，_導流塊係具有
    兩導流面，其使雜體之流動方向平均的分散開，並分別 朝該觸媒部流去。 3·如申請專利範圍第 置，其中： 1項所之具有财道導流塊之微反應裝 多邊 該導流塊係選自三角形 形其中之一。 半圓形、梯形、橢圓形 4·如申請專利範圍第 置，其中： 1項所之具有織道導魏之微反應裝 12 200819387 二銅、氧化鋅、三氧化二銘、鋅、二氧化 如申請糊朗第以所之財微絲導錢之微反應裝 置，其中： _媒反應部上又設有複數個感知器及複數個加熱元 件。
    如申請專她IS S 1項所之具有微鱗導流塊之微反應裝 置，其中·· 該導流部之流體撞擊凹部係選自波浪狀、雙邊内縮狹道 狀、雙邊對稱彎角狀、雙邊對稱圓弧狀其中之一。 13
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