Publications by authors named "Meisheng Liang"

2 Publications

  • Page 1 of 1

Insight into the enhancing activity and stability of Ce modified VO/AC during cyclic desulfurization-regeneration-denitrification.

J Hazard Mater 2021 Sep 30;424(Pt B):127397. Epub 2021 Sep 30.

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address:

Cyclic desulfurization-regeneration-denitrification over carbon-based catalysts is a promising technology for SO and NOx simultaneous elimination in steel industry. Regeneration is imperative to the long-term operation of the process, while the research is limited. In this work, Ce modified VO/AC catalyst (CeVOx/AC) with higher desulfurization and denitrification activity was prepared and the effect of cyclic regeneration was investigated. Results illustrated that the desulfurization and denitrification activity of CeVOx/AC gradually improved with increasing the regeneration cycles at the optimum regeneration temperature of 470 °C in N. The increasing Ce, V and oxygen vacancies, enhanced surface acidity and improved redox ability contributed to the catalytic activity of regenerated catalysts. For desulfurization, more SO transformed into HSO rather than to metal sulfates after cyclic regeneration. For denitrification, the improved redox ability accelerated the oxidation of NO to active NO, bridged nitrites and nitrates, and the enhanced acidity facilitated the NH adsorption, further generating more -NH and promoting the SCR activity of regenerated samples. The CeVOx/AC with good activity and regenerative stability shows great application potential in steel industry for the simultaneous SO and NOx removal.
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http://dx.doi.org/10.1016/j.jhazmat.2021.127397DOI Listing
September 2021

Modified activated carbon catalytic reduction of dissolved oxygen in reclaimed water.

Environ Technol 2021 May 29;42(12):1826-1835. Epub 2019 Oct 29.

College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, People's Republic of China.

Dissolved oxygen (DO) is the main corrosive substance in the transport process of urban reclaimed water by pipelines, and it can be removed by catalytic reduction. Activated carbon (AC) has been conventionally used as a carrier for catalysts. This paper focuses on the effect of modification conditions of AC on the catalytic performance for DO removal by hydrazine. The catalytic performance of modified AC (MAC) samples by single and combinatory methods has been investigated. The results showed that the combinatory method was better than the single method, and the MAC by combinatory method of high-pressure hydrothermal method followed by metal salt solution impregnation method could remarkably promote the catalytic activity for DO removal. The prepared catalyst GS270-5-Ni-60-3 had the optimal catalytic activity at the conditions of reaction temperature of 30°C, pH 10 and the initial DO concentration of 5.31 mg/L, and the DO removal rate could reach 98.74%. Meanwhile, the samples of AC and MAC were characterized using BET, SEM and FTIR technologies. The experimental results showed that the high-pressure hydrothermal method could significantly improve the pore structure of AC, and the clogging of AC was not obvious by impregnation modification. Furthermore, the surface group of MAC also has a certain influence on the DO removal in reclaimed water.
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http://dx.doi.org/10.1080/09593330.2019.1681521DOI Listing
May 2021
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