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Reusability Investigation of a Ruthenium Catalyst during Ruthenium Ion-Catalyzed Oxidative Depolymerization of Lignite for the Production of Valuable Organic Acids

[Image: see text] A clean and efficient conversion process is essential for the utilization of low-rank coals. Lignite, a typical representative of the low-rank coal family, has huge potential for the production of valuable chemicals via the oxidative depolymerization reaction. Ruthenium ion-catalyz...

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Autores principales: Yao, Xuefeng, Wang, Xiaolu, Chen, Yuxin, Zhang, Lu, Liu, Quansheng, He, Runxia, Zhou, Huacong, Cong, Xingshun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8515586/
https://www.ncbi.nlm.nih.gov/pubmed/34661015
http://dx.doi.org/10.1021/acsomega.1c03970
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author Yao, Xuefeng
Wang, Xiaolu
Chen, Yuxin
Zhang, Lu
Liu, Quansheng
He, Runxia
Zhou, Huacong
Cong, Xingshun
author_facet Yao, Xuefeng
Wang, Xiaolu
Chen, Yuxin
Zhang, Lu
Liu, Quansheng
He, Runxia
Zhou, Huacong
Cong, Xingshun
author_sort Yao, Xuefeng
collection PubMed
description [Image: see text] A clean and efficient conversion process is essential for the utilization of low-rank coals. Lignite, a typical representative of the low-rank coal family, has huge potential for the production of valuable chemicals via the oxidative depolymerization reaction. Ruthenium ion-catalyzed oxidation (RICO) is an effective route for lignite depolymerization under mild conditions, but the high cost of precious Ru limits the potential large-scale application of RICO. How to recycle and reuse Ru is critical to promote the application of RICO. In this work, a novel and efficient approach for reusing Ru through recycling the solvent mixture containing Ru was established for RICO. First, the influence of different reaction parameters on the depolymerization degree of lignite and benzene polycarboxylic acid (BPCA) yields was investigated. Second, the distribution of Ru in the organic phase (OP), aqueous phase (AP), and residual solid phase (RSP) was analyzed after the RICO reaction. Finally, based on the distribution of Ru in different phases, a novel route of recycling Ru by reusing the Ru-containing solvents was proposed. The results showed that the dosage of RuCl(3) and NaIO(4) had a significant influence on both the depolymerization degree of lignite and BPCA yields. The distribution of Ru had a close relationship with the depolymerization degree of lignite and the dosage of NaIO(4). After the depolymerization reaction, the CCl(4) phase containing Ru was reused directly as the solvent for the next run, which could fulfill the reuse of both CCl(4) and Ru. The results proved that the Ru-containing CCl(4) phase could maintain catalytic performance for 5 runs. This work provides an efficient route to reuse Ru for the RICO depolymerization of lignite into valuable organic acids. As far as we know, this is the first report concerning the recycling and reuse of Ru during the RICO of lignite. This work is important for the application of RICO in lignite depolymerization.
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spelling pubmed-85155862021-10-15 Reusability Investigation of a Ruthenium Catalyst during Ruthenium Ion-Catalyzed Oxidative Depolymerization of Lignite for the Production of Valuable Organic Acids Yao, Xuefeng Wang, Xiaolu Chen, Yuxin Zhang, Lu Liu, Quansheng He, Runxia Zhou, Huacong Cong, Xingshun ACS Omega [Image: see text] A clean and efficient conversion process is essential for the utilization of low-rank coals. Lignite, a typical representative of the low-rank coal family, has huge potential for the production of valuable chemicals via the oxidative depolymerization reaction. Ruthenium ion-catalyzed oxidation (RICO) is an effective route for lignite depolymerization under mild conditions, but the high cost of precious Ru limits the potential large-scale application of RICO. How to recycle and reuse Ru is critical to promote the application of RICO. In this work, a novel and efficient approach for reusing Ru through recycling the solvent mixture containing Ru was established for RICO. First, the influence of different reaction parameters on the depolymerization degree of lignite and benzene polycarboxylic acid (BPCA) yields was investigated. Second, the distribution of Ru in the organic phase (OP), aqueous phase (AP), and residual solid phase (RSP) was analyzed after the RICO reaction. Finally, based on the distribution of Ru in different phases, a novel route of recycling Ru by reusing the Ru-containing solvents was proposed. The results showed that the dosage of RuCl(3) and NaIO(4) had a significant influence on both the depolymerization degree of lignite and BPCA yields. The distribution of Ru had a close relationship with the depolymerization degree of lignite and the dosage of NaIO(4). After the depolymerization reaction, the CCl(4) phase containing Ru was reused directly as the solvent for the next run, which could fulfill the reuse of both CCl(4) and Ru. The results proved that the Ru-containing CCl(4) phase could maintain catalytic performance for 5 runs. This work provides an efficient route to reuse Ru for the RICO depolymerization of lignite into valuable organic acids. As far as we know, this is the first report concerning the recycling and reuse of Ru during the RICO of lignite. This work is important for the application of RICO in lignite depolymerization. American Chemical Society 2021-09-28 /pmc/articles/PMC8515586/ /pubmed/34661015 http://dx.doi.org/10.1021/acsomega.1c03970 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Yao, Xuefeng
Wang, Xiaolu
Chen, Yuxin
Zhang, Lu
Liu, Quansheng
He, Runxia
Zhou, Huacong
Cong, Xingshun
Reusability Investigation of a Ruthenium Catalyst during Ruthenium Ion-Catalyzed Oxidative Depolymerization of Lignite for the Production of Valuable Organic Acids
title Reusability Investigation of a Ruthenium Catalyst during Ruthenium Ion-Catalyzed Oxidative Depolymerization of Lignite for the Production of Valuable Organic Acids
title_full Reusability Investigation of a Ruthenium Catalyst during Ruthenium Ion-Catalyzed Oxidative Depolymerization of Lignite for the Production of Valuable Organic Acids
title_fullStr Reusability Investigation of a Ruthenium Catalyst during Ruthenium Ion-Catalyzed Oxidative Depolymerization of Lignite for the Production of Valuable Organic Acids
title_full_unstemmed Reusability Investigation of a Ruthenium Catalyst during Ruthenium Ion-Catalyzed Oxidative Depolymerization of Lignite for the Production of Valuable Organic Acids
title_short Reusability Investigation of a Ruthenium Catalyst during Ruthenium Ion-Catalyzed Oxidative Depolymerization of Lignite for the Production of Valuable Organic Acids
title_sort reusability investigation of a ruthenium catalyst during ruthenium ion-catalyzed oxidative depolymerization of lignite for the production of valuable organic acids
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8515586/
https://www.ncbi.nlm.nih.gov/pubmed/34661015
http://dx.doi.org/10.1021/acsomega.1c03970
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