| Title: | Toxic chromium treatment induce amino-assisted electrostatic adsorption for the synthesis of highly dispersed chromium catalyst |
| Author(s): | Yang S; He D; Zhang L; Zhang Y; Lu J; Luo Y; |
| Address: | "Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, PR China. National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment, Tsinghua University, Beijing 100084, PR China; Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, PR China. Electronic address: dedong.he@qq.com. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, PR China. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, PR China. Electronic address: environcatalysis@kust.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2021.126155 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Removal of toxic Cr (VI) from aqueous solutions using silicon-based adsorbents has been widely investigated. Meanwhile, contradictory between highly dispersed active Cr species and high Cr loading over commercial Cr-based catalyst was inevitable. In this work, amino-assisted electrostatic adsorption from toxic Cr (VI) treatment was developed to prepare highly dispersed Cr oxides catalysts supported on MCM-41. The Cr loading was as high as 15 wt%, and structure characters of the catalysts were well-reserved. As a result, electrostatic adsorption and subsequent complexation from negatively charged Cr (VI) species and positively charged ammonium groups made a positive contribution to the appearance of highly dispersed mono Cr species, which gave rise to improved non-oxidative propane dehydrogenation (PDH) activity. In contrast, the agglomeration of Cr species and lower PDH activity were observed on the sample synthesized using the traditional wet impregnation method. Besides, the transformation of Cr (VI) to active Cr (III) sites over the catalyst was proved by the designed in-situ H(2)-TPR, ex-situ UV-vis and Raman spectra results. This procedure reflects a new avenue of green chemistry, which can recycle waste Cr adsorbents as efficient PDH catalysts" |
| Keywords: | Electrostatic adsorption High dispersion Mono Cr (VI) Propane dehydrogenation Toxic chromium; |
| Notes: | "PubMed-not-MEDLINEYang, Shuang He, Dedong Zhang, Liming Zhang, Yaliu Lu, Jichang Luo, Yongming eng Netherlands 2021/07/08 J Hazard Mater. 2021 Sep 5; 417:126155. doi: 10.1016/j.jhazmat.2021.126155. Epub 2021 May 19" |
