{"id":3235,"date":"2020-10-10T05:48:18","date_gmt":"2020-10-10T05:48:18","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=3235"},"modified":"2020-10-10T05:48:18","modified_gmt":"2020-10-10T05:48:18","slug":"hydrogen-removal-efficiency","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/hydrogen-removal-efficiency\/","title":{"rendered":"Efisiensi Penghilangan Hidrogen"},"content":{"rendered":"

Proses penghilangan hidrogen dari aluminium cair pertama-tama terjadi di dalam cairan tersebut. Atom-atom hidrogen yang terlarut dalam aluminium cair berpindah ke bagian tepi gelembung-gelembung zat pemurni (Ar atau N\u2082, dll.). Di bagian tepi gelembung tersebut, hidrogen teradsorpsi dan terbentuk menjadi molekul hidrogen sebelum masuk ke dalam gelembung. Akhirnya, gelembung tersebut mengapung ke atas dan terlepas dari aliran cairan aluminium. Ini adalah proses di mana hidrogen berdifusi dalam fase cair dan diserap oleh gelembung. Persamaan laju penghilangan hidrogen pada aluminium cair mencerminkan efisiensi penghilangan hidrogen dari aluminium cair dari sudut pandang kinetika penghilangan hidrogen.<\/p>\n

\"Efisiensi<\/p>\n

Untuk memaksimalkan kondisi kinetika penghilangan hidrogen dan meningkatkan efisiensi penghilangan hidrogen internal pada aluminium cair, kelima persyaratan berikut ini harus dipenuhi semaksimal mungkin secara bersamaan.<\/p>\n

Jumlah gelembung yang banyak menandakan bahwa aliran gas yang memadai harus disediakan. Aliran gas biasanya merupakan faktor utama yang memengaruhi efektivitas penghilangan hidrogen dari flotasi gelembung<\/a>. Dalam kondisi yang sama, semakin besar aliran gas, semakin besar pula luas permukaan spesifik pada zona kontak gas-cair.<\/p>\n

Diameter gelembungnya kecil. Pada laju aliran udara yang sama, jika ukuran gelembung kecil, jumlah gelembung akan secara alami bertambah, sehingga secara efektif meningkatkan luas permukaan spesifik kontak gas-cair. Perhitungan teoretis menunjukkan bahwa peningkatan luas permukaan total gelembung berbanding terbalik dengan ukuran diameter gelembung. Pada saat yang sama, mengurangi diameter gelembung akan membantu meningkatkan koefisien perpindahan massa.<\/p>\n

Gelembung-gelembung tersebut tersebar secara merata di dalam kolam lelehan aluminium. Hal ini dapat secara efektif mengurangi jarak difusi hidrogen yang terlarut dalam aluminium cair hingga membentuk gelembung. Hal ini tidak boleh diremehkan, karena difusi hidrogen dalam fase cair seringkali menjadi faktor pembatas dalam proses kinetik penghilangan hidrogen yang disebutkan di atas. Penyebaran gelembung yang merata setara dengan penguatan proses difusi atau kapasitas transfer massa.<\/p>\n

Gelembung-gelembung tersebut bergerak dengan kecepatan tinggi di dalam aluminium cair. Hal ini meningkatkan kecepatan pengadukan di dalam aluminium cair, memperkuat pembaruan antarmuka gas-cair, dan meningkatkan kapasitas transfer massa pada fase cair.<\/p>\n

Gelembung-gelembung tersebut memiliki waktu tinggal yang cukup di dalam aluminium cair. Dengan cara ini, potensi gelembung-gelembung tersebut dalam mengangkut hidrogen dapat dimanfaatkan sepenuhnya, yang setara dengan memperpanjang waktu dehidrogenasi gelembung-gelembung tersebut. Pada saat yang sama, orang-orang semakin menyadari bahwa selama proses pemurnian aluminium cair, penyerapan hidrogen dapat terjadi pada permukaan aluminium cair sambil menghilangkan hidrogen di dalam aluminium cair tersebut.<\/p>","protected":false},"excerpt":{"rendered":"

The process of removing hydrogen from molten aluminum first takes place inside the melt. The hydrogen atoms dissolved in molten aluminum undergo migration to the periphery of the bubbles of the purifying agent (Ar or N2, etc.). At the periphery of the bubble, it is adsorbed and formed into hydrogen molecules to enter the bubble. […]<\/p>\n","protected":false},"author":1,"featured_media":3237,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-3235","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nHydrogen Removal Efficiency of Bubble Floatation<\/title>\n<meta name=\"description\" content=\"Gas flow is the main factor affecting the hydrogen removal efficiency. 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