2"/> 2轉(zhuǎn)化為金紅石型TiO2，反應(yīng)后得到了金紅石型TiO2。金紅石型TiO2中的鈦的價(jià)態(tài)為四價(jià)，晶格氧和化學(xué)吸附氧分別占57.26%和42.74%。該方法可以同時(shí)解決2種廢棄物的處置問題。"/>

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廢棄SCR脫硝催化劑與廢NaCl鹽焙燒回收催化劑中的鈦、釩、鎢
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國能龍?jiān)喘h(huán)保有限公司，北京 100039

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基金項(xiàng)目:

國家重點(diǎn)研發(fā)計(jì)劃(2019YFC1907503).


Recovery of Titanium, Vanadium and Tungsten from Waste SCR Catalysts by Roasting with Waste NaCl Salts
Author:
Affiliation:

China Energy LongYuan Environmental Protection Co., Ltd, Beijing 100039, China

Fund Project:

National Key Research and Development Program of China (2019YFC1907503)

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    摘要:

    通過廢棄選擇性催化還原（SCR）脫硝催化劑與廢NaCl鹽焙燒，可以將催化劑中的鎢和釩與鈦分離。在最佳浸出條件下（焙燒溫度900 ℃，焙燒時(shí)間3 h，廢鹽與廢催化劑的質(zhì)量比為0.5，浸出溫度80 ℃，反應(yīng)時(shí)間60 min），鎢和釩的浸出率分別達(dá)到84.63%和66.42%，同時(shí)鈦的損失率僅為1.3%。廢NaCl鹽和焙燒溫度可以促進(jìn)銳鈦礦型TiO2轉(zhuǎn)化為金紅石型TiO2，反應(yīng)后得到了金紅石型TiO2。金紅石型TiO2中的鈦的價(jià)態(tài)為四價(jià)，晶格氧和化學(xué)吸附氧分別占57.26%和42.74%。該方法可以同時(shí)解決2種廢棄物的處置問題。

    Abstract:

    Tungsten and vanadium was separated from Ti in waste selective catalytic reduction (SCR) catalyst by roasting with waste NaCl salts (WNCS). Results show that the leaching efficiency of tungsten and vanadium reaches 84.63% and 66.42%, respectively, under the optimal conditions (roasting temperature 900 °C; roasting time 3 h; mass ratio of WNCS to waste SCR catalysts 0.5; reaction temperature 80 °C; reaction time 60 min), and the loss rate of titanium is 1.3%. The waste NaCl salts and roasting temperature play a positive role in converting anatase TiO2 to rutile TiO2. And the rutile TiO2 is obtained. The valence of rutile TiO2 is quadrivalent, and the lattice oxygen and chemisorbed oxygen occupy 57.26% and 42.74%, respectively.

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劉向輝,何發(fā)泉,路光杰,王洪亮.廢棄SCR脫硝催化劑與廢NaCl鹽焙燒回收催化劑中的鈦、釩、鎢[J].稀有金屬材料與工程,2023,52(2):454~460.[Liu Xianghui, He Faquan, Lu Guangjie, Wang Hongliang. Recovery of Titanium, Vanadium and Tungsten from Waste SCR Catalysts by Roasting with Waste NaCl Salts[J]. Rare Metal Materials and Engineering,2023,52(2):454~460.]
DOI：10.12442/j. issn.1002-185X.20220408

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  • 收稿日期:2022-05-10
  • 最后修改日期:2023-02-08
  • 錄用日期:2022-09-27
  • 在線發(fā)布日期: 2023-03-03
  • 出版日期: 2023-02-28