工業技術研究院

技術簡介

以噴霧乾燥法(spray-drying process)製備中孔徑矽基吸附材(Mesoporous Silica Particles，簡稱MSP)，比傳統的水熱法及凝膠合成法快速，並可大幅降低時間成本。工研院自行設計與建構一套噴霧乾燥實驗機台製備MSP，產能達50g/hr以上，由物理特性分析顯示，MSP具有高比面積、均一孔洞等特性，其比表面積可達1,000 m2/g以上，平均孔徑2.4 nm，性質與實驗室級相當。 由於MSP表面富含高濃度矽烷醇基(Silanol，SiOH)，可藉由胺基表面改質處理技術，嫁接或含浸含胺官能基(如：EDA或TEPA)增加吸附CO2，吸附後之吸附材亦可利用溫和方式進行脫附循環再生使用。經20次循環吸脫附測試，此吸附劑仍保有原來的物化性質與吸附容量。由於中孔徑吸附材具有質傳速率快、操作簡單、低能耗等優點，使其具備實廠應用的優勢。

Abstract

The preparation of mesoporous silica particles (MSPs) by spray-drying process has been successfully developed. Spray-drying process is a simple and low-cost process compared with hydrothermal and sol-gel process. The production rate of MSP was increased to 50g/h. The surface area and average pore size of MSP was 1,000 m2/g and 2.4 nm, respectively. MSPs have revealed excellent properties, such as well-ordered hexagonal structures, high pore volume, and uniform pore sizes. Therefore, MSP can be used as a novel candidate for carbon dioxide capture. Due to the high concentration of silanol groups (SiOH) on the surface of MSP, surface modification by grafting or impregnation methods with amine group (such as N-[3-(trimethoxysilyl)propyl]ethylenediamine (EDA) and tetraethylenepentamine (TEPA)) can be conducted to enhance the CO2 adsorption. These amine-modified adsorbents can be regenerated completely under mild conditions. The adsorption capacities and the physicochemical properties of these adsorbents were preserved after 20 cycles of adsorption and regeneration. This suggests that the novel amine-modified adsorbents can be employed in the prolonged cyclic CO2 adsorption. They are thus cost-effective adsorbents for large-scale CO2 capture from flue gases in the foreseeable future due to fast mass transfer and low penalty.

技術規格

1.MSP比表面積＆gt; 1,000m2/g，平均孔徑2.4nm。 2.TEPA、EDA改質後之MSP，經過20次反覆吸脫附的實驗，對CO2的吸附指標仍可達90％、100％。

Technical Specification

The surface area and average pore size of MSPs was over 1,000 m2/g and 2.4 nm, respectively. The adsorption index was nearly 100％ for MSP(EDA) and 90％ for MSP(TEPA), respectively.

技術特色

以噴霧氣膠方法製備中孔徑矽基吸附材，大幅縮短製程時間，並已經成功量產，產能達100 g/h，製備所得之吸附材具備高比表面積(＆gt;1,000 m2/g)、高孔洞體積、 均一孔徑(2.4 nm)等特性，並可藉由表面改質技術提升中孔徑矽基吸附材對CO2的吸附容量達200 mg/g以上。

應用範圍

燃煤發電鍋爐、汽電共生鍋爐、焚化爐、水泥窯、電弧爐等煙道氣中CO2捕獲，以及其他之重金屬、揮發份有機物等。

接受技術者具備基礎建議（設備）

1.工程顧問公司 2.環工設備設計製造廠商 3.綠能產業

接受技術者具備基礎建議（專業）

1.環工相關技術 2.綠能產業技術

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