Work

Fabrication of VOx/AFCC-PG Catalyst from Waste Support for Hg0 Removal in Flue Gas

Year: 2025

Type: article

Abstract: The efficient removal of elemental mercury (Hg0) from coal-fired flue gas is a critical challenge in environmental governance. This study proposes utilizing waste fluid catalytic cracking catalyst (WFCC) as the potential support for Hg0 catalytic oxidation. After activation (AFCC) via calcination decarbonization, a composite support (AFCC-PG) was fabricated using palygorskite (PG) as a binder. Subsequently, VOx was loaded onto the support to form the VOx/AFCC-PG catalyst for Hg0 removal. Experimental results demonstrate that the VOx/AFCC-PG catalyst achieves >95% Hg0 removal efficiency under simulated flue gas conditions (150 °C, GHSV = 6000 h−1) while maintaining excellent stability over 60 h. Furthermore, Hg-TPD and XPS analyses indicate that the synergistic lattice oxygen oxidation–adsorption established between VOx and the AFCC-PG plays a key role in efficient Hg0 removal. This study proposes a cost-effective strategy for both the resource utilization of waste catalysts and the control of mercury pollution in coal-fired flue gas.

Source: Catalysts

DOI: 10.3390/catal15090799

Authors: Xuhui Wei, Ruoyang Du, Rushan Zhao, Wenzhi Li, Caihong Jiang, Junwei Wang

Institution: Anqing Normal University

Language: English

Topic: Industrial Gas Emission Control

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,654