用於氨氣催化之銅基觸媒COPPER-BASED CATALYST FOR CONVERTING AMMONIA INTO NITROGEN

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

13/961,470

專利證號

US 9,138,726 B2

專利獲證名稱

用於氨氣催化之銅基觸媒COPPER-BASED CATALYST FOR CONVERTING AMMONIA INTO NITROGEN

專利所屬機關 (申請機關)

義守大學

獲證日期

2015/09/22

技術說明

目前的研究主要以含浸法進行於金屬氧化物上沉積觸媒合成金屬氧化物或貴金屬摻雜，或以化學還原法進行觸媒合成。所合成之觸媒僅適用於較低濃度(<5%)之氨氣進行分解，且反應溫度較高(200C~600C)；若以鉑、鈀等貴金屬做為觸媒，除價格較高之外其反應性高但選擇性差；若以其他過渡金屬如鐵、鎳或鈷等金屬或金屬氧化物做為觸媒，其擇性高但反應性差需較高反應溫度，於較高之反應溫度下氨氣容易繼續氧化為NOx降低其選擇性。 本發明於酸性之水熱反應中合成以低氧化態之金屬銅及氧化亞銅為主之銅基觸媒，降低反應溫度大幅增加其選擇性，本發明所使用之操作溫度為150-300C，可分解76 ppm-99%之氨氣，且其轉化率接近100%且具有極高之選擇性。 It is important to develop a highly selective ammonia decomposition catalyst for high concentration ammonia. In the previous investigation, most of these kind of catalysts were synthesized using impregnation, but most of them were applied for decomposition of relatively low concentration ammonia (<5%) at higher temperature, 200-600C. However, ammonia might be oxidized to NOx at higher temperature, so the selectivity might decline at the elevated temperature. In this invention, a kind of copper based catalyst with lower valances, Cu0 and Cu2O, were synthesized utilizing hydrothermal techniques in acidic condition and. The decomposition temperature range could be from 150C to 300C and it could decompose 76 ppm - 99% ammonia with high conversion, closed to 100%, and with high selectivity.

備註

本部(發文號1080023871)同意該校107年12月13日義大產字第1070016219號函申請終止維護專利。

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