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Regeneration of Selective Catalyst Reduction Catalysts Deactivated by Pb, As, and Alkali Metals.
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-07 , DOI: 10.1021/acsomega.0c01283
Jingxin Li 1 , Pan Zhang 1 , Lan Chen 1 , Yajuan Zhang 1 , Liqiang Qi 1
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-07 , DOI: 10.1021/acsomega.0c01283
Jingxin Li 1 , Pan Zhang 1 , Lan Chen 1 , Yajuan Zhang 1 , Liqiang Qi 1
Affiliation
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Owing to increased operating time and Pb, As, and alkali metal poisoning of a catalyst, the activity of the catalyst is lowered. In the present study, we utilized the acetic acid and the traditional sulfuric acid pickling process for regeneration and then performed Brunauer–Emmett–Teller (BET) specific surface area, denitrification efficiency, scanning electron microscopy, and X-ray fluorescence (XRF) analysis of a fresh catalyst, a deactivated catalyst, and a regenerated catalyst for comparison purposes. The experimental results demonstrated that the removal ratios of Pb, As, Na, and K were 99.2, 98.8, 99.9, and 93.9%, respectively. Compared to the traditional sulfuric acid regeneration technology, the acetic acid regeneration technology eliminates the activated liquid immersion step; therefore, the steps are simpler and efficient for the regeneration of selective catalyst reduction catalysts deactivated by Pb, As, and alkali. The current study provides a new method for the regeneration and application of selective catalyst reduction (SCR) catalysts, which is particularly applicable for regenerating a large number of Pb, As, and alkali-metal poisoned catalysts.
中文翻译：
铅，砷和碱金属失活的选择性催化剂还原催化剂的再生。
由于增加的操作时间和Pb，As和催化剂的碱金属中毒，催化剂的活性降低。在本研究中，我们利用乙酸和传统的硫酸酸洗工艺进行再生，然后进行Brunauer-Emmett-Teller（BET）比表面积，反硝化效率，扫描电子显微镜和X射线荧光（XRF）分析为了比较目的，对新鲜催化剂，失活催化剂和再生催化剂进行分析。实验结果表明，Pb，As，Na和K的去除率分别为99.2％，98.8、99.9和93.9％。与传统的硫酸再生技术相比，乙酸再生技术省去了活化液浸入步骤；因此，对于再生被Pb，As和碱失活的选择性催化剂还原催化剂而言，这些步骤更简单有效。当前的研究提供了一种再生和应用选择性催化剂还原（SCR）催化剂的新方法，该方法特别适用于再生大量Pb，As和碱金属中毒的催化剂。
更新日期：2020-06-07
中文翻译：
铅，砷和碱金属失活的选择性催化剂还原催化剂的再生。
由于增加的操作时间和Pb，As和催化剂的碱金属中毒，催化剂的活性降低。在本研究中，我们利用乙酸和传统的硫酸酸洗工艺进行再生，然后进行Brunauer-Emmett-Teller（BET）比表面积，反硝化效率，扫描电子显微镜和X射线荧光（XRF）分析为了比较目的，对新鲜催化剂，失活催化剂和再生催化剂进行分析。实验结果表明，Pb，As，Na和K的去除率分别为99.2％，98.8、99.9和93.9％。与传统的硫酸再生技术相比，乙酸再生技术省去了活化液浸入步骤；因此，对于再生被Pb，As和碱失活的选择性催化剂还原催化剂而言，这些步骤更简单有效。当前的研究提供了一种再生和应用选择性催化剂还原（SCR）催化剂的新方法，该方法特别适用于再生大量Pb，As和碱金属中毒的催化剂。
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