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通过葡萄糖水热处理并经氢氧化钾活化制备的活性炭用于在BEA-AMP双溶剂混合物中催化吸收一氧化碳

Activated Carbon Produced from the Hydrothermal Treatment of Glucose with KOH Activation for Catalytic Absorption of CO in a BEA-AMP Bi-Solvent Blend.

作者信息

Appiah Foster Amoateng, Nugloze Dzifa, Sai-Obodai Lois Sandra, Natewong Paweesuda, Idem Raphael O

机构信息

Clean Energy Technology Research Institute (CETRI), Faculty of Engineering and Applied Science, University of Regina, 3737 Wascana Parkway, Regina, Saskatchewan S4S 0A2, Canada.

出版信息

ACS Omega. 2023 Feb 28;8(10):9346-9355. doi: 10.1021/acsomega.2c07758. eCollection 2023 Mar 14.

DOI:10.1021/acsomega.2c07758
PMID:36936333
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10018496/
Abstract

The amine-based postcombustion CO capture (PCC) process involves absorption of CO into a solvent and then regenerating the solvent to produce CO. In this study, the effect of an activated carbon (AC) catalyst, synthesized through hydrothermal treatment and furnace activation on CO absorption in a 4M BEA/AMP amine blend, was evaluated and compared with that of a KMgO/CNTs (1:4) catalyst. The physical and chemical properties of AC were investigated with a scanning electron microscope (SEM), CO temperature-programmed desorption (CO-TPD), Brunauer-Emmett-Teller (BET), powder X-ray diffraction (XRD), and thermogravimetric analyzer (TGA) and compared with the KMgO/CNTs (1:4) catalyst. The results showed that when compared against noncatalytic CO absorption, AC enhanced the linear rate of CO absorption by 33.3%, while for KMgO/CNTs, it was reported as 25.5%. The relatively higher surface area, combined with the higher number and strength of basic sites of AC relative to the KMgO/CNTs (1:4) catalyst, provided effective basic reaction sites for CO absorption, thereby enhancing the rate of CO absorption into the amine. AC was also relatively easier to synthesize which would provide a good replacement for the CNT-based catalyst which has carcinogenic tendencies.

摘要

基于胺的燃烧后二氧化碳捕集（PCC）工艺包括将二氧化碳吸收到溶剂中，然后使溶剂再生以产生二氧化碳。在本研究中，评估了通过水热处理和炉内活化合成的活性炭（AC）催化剂对4M BEA/AMP胺混合物中二氧化碳吸收的影响，并与KMgO/CNTs（1:4）催化剂进行了比较。用扫描电子显微镜（SEM）、二氧化碳程序升温脱附（CO-TPD）、布鲁诺尔-埃米特-特勒（BET）、粉末X射线衍射（XRD）和热重分析仪（TGA）研究了AC的物理和化学性质，并与KMgO/CNTs（1:4）催化剂进行了比较。结果表明，与非催化二氧化碳吸收相比，AC使二氧化碳吸收的线性速率提高了33.3%，而KMgO/CNTs的提高率为25.5%。相对于KMgO/CNTs（1:4）催化剂，AC具有相对较高的表面积，以及更多数量和更强强度的碱性位点，为二氧化碳吸收提供了有效的碱性反应位点，从而提高了二氧化碳吸收到胺中的速率。AC也相对更容易合成，这将为具有致癌倾向的基于碳纳米管的催化剂提供良好的替代物。

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