High-temperature dechlorination performance of solid waste-based dechlorination agents

WANG Xuening; LI Hui; HU Yingying; GOU Yujin; CAO Taiyu; QI Yongle; ZHENG Wukui

doi:10.13205/j.hjgc.202606009

Volume 44 Issue 6

Jun. 2026

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2026 > 44(6): 84-91

WANG Xuening, LI Hui, HU Yingying, GOU Yujin, CAO Taiyu, QI Yongle, ZHENG Wukui. High-temperature dechlorination performance of solid waste-based dechlorination agents[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(6): 84-91. doi: 10.13205/j.hjgc.202606009

Citation:

WANG Xuening, LI Hui, HU Yingying, GOU Yujin, CAO Taiyu, QI Yongle, ZHENG Wukui. High-temperature dechlorination performance of solid waste-based dechlorination agents[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(6): 84-91. doi: 10.13205/j.hjgc.202606009

Citation:

WANG Xuening, LI Hui, HU Yingying, GOU Yujin, CAO Taiyu, QI Yongle, ZHENG Wukui. High-temperature dechlorination performance of solid waste-based dechlorination agents[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(6): 84-91. doi: 10.13205/j.hjgc.202606009

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High-temperature dechlorination performance of solid waste-based dechlorination agents

doi: 10.13205/j.hjgc.202606009

School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

Received Date: 2025-01-12
Accepted Date: 2025-03-13
Rev Recd Date: 2025-02-19

Available Online: 2026-07-06

Abstract

Abstract

With China's rapid economic and urban growth， the amount of domestic waste is increasing annually. Effective disposal of domestic waste has become a research focus. Collaborative disposal of domestic waste in industrial kilns is an effective treatment method； however， high temperature generates Cl₂ and HCl gases， which cause equipment corrosion and reduce service life. High-temperature dechlorination is thus crucial for controlling chlorine release， minimizing equipment damage， and enhancing co-processing efficiency and safety. In this study， fly ash and red mud were selected as the primary raw materials to investigate their potential for dechlorination at high temperatures. Fly ash， a by-product of coal combustion， and red mud， a residue from alumina production， are abundant solid wastes that can potentially be utilized for this purpose. The results showed that at 700 ℃， fly ash achieved a dechlorination efficiency of 93.33%， while red mud achieved 88.61%. These findings suggest that both materials have considerable potential for dechlorination. However， as the temperature increased， the dechlorination efficiency of both materials declined. To address this issue and optimize the dechlorination efficiency of fly ash， modification studies were conducted. The results indicated that alkali-modified fly ash significantly improved its dechlorination efficiency. Specifically， at 800 ℃， the dechlorination efficiency of alkali-modified fly ash increased from 71.9% to 94.98%. This suggests that alkali modification enhances the dechlorination capability of fly ash and enables more effective adsorption of HCl gas. Overall， this study not only verifies the feasibility of using solid waste as a dechlorination agent but also opens up new avenues for the resource utilization of solid waste. By repurposing fly ash and red mud for high-temperature dechlorination， this study contributes to more sustainable waste management practices and reduces the environmental footprint of industrial processes.
- high temperature,
- dechlorination,
- solid waste,
- fly ash,
- red mud,
- modification

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References(28)

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