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class="hotkw_left"><span>熱門(mén)產(chǎn)品：</span>蜂窩分子篩,分子篩吸附劑</div> <div id="vhsc3bw" class="search_right"> <form action="/products.html" method="post" onsubmit="return checkFrom(this);"> <div id="vhsc3bw" class="sc_ipt"><input type="text" name="keyword" placeholder="請輸入產(chǎn)品名稱(chēng)" maxlength="50" /></div> <div id="vhsc3bw" class="sc_btn"><input type="submit" value="搜索" /></div> <div id="vhsc3bw" class="clear"></div> </form> </div> <div id="vhsc3bw" class="clear"></div> </div> </div>   <div id="vhsc3bw" class="ly_crumb"> <img src="/skins/647015/images/crumb_icon.png" /><p>當前位置：<a href="/">首頁(yè)</a> > <a href="/article.html">技術(shù)文章</a> > <span>沸石和分子篩區別是什么呢？</span></p> </div>   <div id="vhsc3bw" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">沸石和分子篩區別是什么呢？</h1> <div id="vhsc3bw" class="NyNewsdetail_tips">更新時(shí)間：2022-03-03 點(diǎn)擊次數：4628</div> <div id="vhsc3bw" class="NyNewsdetail_con"> <div>　　沸石和分子篩區別是什么？<br /> </div><div>　　從化學(xué)成分上說(shuō)是一樣的。結構上也差不多，小玻璃珠可以防爆沸是利用的它內有氣泡在壁上容，并不是沸石。實(shí)際上，它們的主要區別是在他們的用途上，沸石一般是天然的，孔徑大小不一，只要有空泡就可以防止爆沸。而分子篩的功能要高的多，比如篩選分子、做催化劑、緩釋催化劑等，因而對孔徑有一定的要求，經(jīng)常是人工合成的。有時(shí)天然沸石也可以做分子篩用。而沸石分子篩是結晶鋁硅酸金屬鹽的水合物，蜂窩沸石分子篩有兩個(gè)特點(diǎn)：<br /> </div><div>　　1、表面上的路易斯中心極性很強；<br /> </div><div>　　2、沸石中的籠或通道的尺寸很小，使得其中的引力場(chǎng)很強。因此，其對吸附質(zhì)分子的吸附能力遠超過(guò)其他類(lèi)型的吸附劑。即使吸附質(zhì)的分壓(或濃度)很低，吸附量仍很可觀(guān)。沸石分子篩的吸附分離效果不僅與吸附質(zhì)分子的尺寸和形狀有關(guān)，而且還與其極性有關(guān)，因此，沸石分子篩也可用于尺寸相近的物質(zhì)的分離。<br /> </div><div>　　沸石分子篩具有規整晶體結構，其中每一類(lèi)都具有一定尺寸、形狀的孔道結構，并具有較大比表面積。大部分沸石分子篩表面具有較強的酸中心，同時(shí)晶孔內有強大的庫侖場(chǎng)起極化作用。這些特性使它成為性能優(yōu)異的催化劑。多相催化反應是在固體催化劑上進(jìn)行的，催化活性與催化劑的晶孔大小有關(guān)。沸石分子篩作為催化劑或催化劑載體時(shí)，催化反應的進(jìn)行受到沸石分子篩晶孔大小的控制。晶孔和孔道的大小和形狀都可以對催化反應起著(zhù)選擇性作用。在一般反應條件下沸石分子篩對反應方向起主導作用，呈現了擇形催化性能，這一性能使沸石分子篩作為催化新材料具有強大生命力。</div> </div> <div id="vhsc3bw" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-986212.html">沸石分子篩具有規整的孔道結構</a></li> <li>下一篇：<a 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