Combustion behavior and pollutant emissions of the pressurized fluidized bed oxy-fuel co-firing of coal and poultry manure

doi:10.1016/j.cjche.2025.05.006

中国化学工程学报 ›› 2025, Vol. 83 ›› Issue (7): 171-181.DOI: 10.1016/j.cjche.2025.05.006

Combustion behavior and pollutant emissions of the pressurized fluidized bed oxy-fuel co-firing of coal and poultry manure

Qinwen Liu^1,2, Yiwei Zhang¹, Hengbing Ye¹, Guanwen Zhou¹, Yu Su², Wenli Dong³, Chi-Hwa Wang⁴, Wenqi Zhong¹

1 School of Energy and Environment, Southeast University, Nanjing 210096, China;
2 State Key Laboratory of Low-carbon Smart Coal-fired Power Generation and Ultra-clean Emission, Southeast University, Nanjing 210096, China;
3 Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Nanjing 210036, China;
4 Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore

收稿日期:2025-03-06 修回日期:2025-04-27 接受日期:2025-05-06 出版日期:2025-07-28 发布日期:2025-07-28
通讯作者: Wenqi Zhong,E-mail:wqzhong@seu.edu.cn
基金资助:
This research is supported by the National Natural Science Foundation of China (52306131), the Natural Science Foundation of Jiangsu Province (BK20230847), the Key Project of the National Natural Science Foundation of China (52336005), and the Open Project Program of State Key Laboratory of Low-carbon Smart Coalfired Power Generation and Ultra-clean Emission (D2024FK156).

Combustion behavior and pollutant emissions of the pressurized fluidized bed oxy-fuel co-firing of coal and poultry manure

Qinwen Liu^1,2, Yiwei Zhang¹, Hengbing Ye¹, Guanwen Zhou¹, Yu Su², Wenli Dong³, Chi-Hwa Wang⁴, Wenqi Zhong¹

1 School of Energy and Environment, Southeast University, Nanjing 210096, China;
2 State Key Laboratory of Low-carbon Smart Coal-fired Power Generation and Ultra-clean Emission, Southeast University, Nanjing 210096, China;
3 Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Nanjing 210036, China;
4 Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore

Received:2025-03-06 Revised:2025-04-27 Accepted:2025-05-06 Online:2025-07-28 Published:2025-07-28
Contact: Wenqi Zhong,E-mail:wqzhong@seu.edu.cn
Supported by:
This research is supported by the National Natural Science Foundation of China (52306131), the Natural Science Foundation of Jiangsu Province (BK20230847), the Key Project of the National Natural Science Foundation of China (52336005), and the Open Project Program of State Key Laboratory of Low-carbon Smart Coalfired Power Generation and Ultra-clean Emission (D2024FK156).

摘要/Abstract

摘要： Pressurized oxy-fuel combustion is a next-generation and low-cost carbon capture technology with industrial application potential. This work presents an innovative research explorationdcoupling coal pressurized fluidized bed oxy-fuel combustion technology with energy utilization of poultry manure as a renewable and carbon-neutral fuel, in order to capture CO₂ and solve the problem of poultry manure treatment simultaneously. In this study, a stable co-combustion of coal and chicken manure in a laboratory-scale pressurized fluidized bed under typical oxy-fuel condition (30%O₂/70%CO₂, i.e., Oxy-30) is achieved. The key parameters including the combustion pressure (0.1-0.5 MPa) and chicken-manure proportion (0% to 100%) and their impacts on fundamental combustion efficiency, carbon conversion, nitrogen and sulfur pollutant emissions, and residue ash characteristics have been investigated. The result show that pressurization favors an increase in the CO₂ enrichment concentration and fluidized bed combustion efficiency. During co-combustion under 0.1 and 0.3 MPa, the CO₂ concentration in the flue gas is the highest when the chicken manure blending ratio (M_pm) is 25%. Although the NO emissions fluctuate and even increase as M_pm increases, the co-combustion of coal and chicken manure exhibits a synergistic effect in reducing NO conversion rate (X_NO). The effect of pressurization on reducing NO emission is significant, X_NO at M_pm = 25% decreasing from 15% to 5% as the pressure (P) increases from 0.1 to 0.5 MPa. As P increases from 0.1 to 0.5 MPa and M_pm increases from 0% to 50%, the SO₂ emissions and conversion rates decrease. The self-desulfurization process plays an important role in the reduction of SO₂ emissions during pressurized oxy-fuel co-combustion. The aim of this work is to advance the development and application of pressurized fluidized bed oxy-fuel co-combustion technology and promote a circular bioeconomy and carbon-free waste management for biomass derived from livestock manure.

关键词: Pressurized fluidized bed, Oxy-fuel combustion, Co-firing of coal and poultry manure, Pollutant emissions

Abstract: Pressurized oxy-fuel combustion is a next-generation and low-cost carbon capture technology with industrial application potential. This work presents an innovative research explorationdcoupling coal pressurized fluidized bed oxy-fuel combustion technology with energy utilization of poultry manure as a renewable and carbon-neutral fuel, in order to capture CO₂ and solve the problem of poultry manure treatment simultaneously. In this study, a stable co-combustion of coal and chicken manure in a laboratory-scale pressurized fluidized bed under typical oxy-fuel condition (30%O₂/70%CO₂, i.e., Oxy-30) is achieved. The key parameters including the combustion pressure (0.1-0.5 MPa) and chicken-manure proportion (0% to 100%) and their impacts on fundamental combustion efficiency, carbon conversion, nitrogen and sulfur pollutant emissions, and residue ash characteristics have been investigated. The result show that pressurization favors an increase in the CO₂ enrichment concentration and fluidized bed combustion efficiency. During co-combustion under 0.1 and 0.3 MPa, the CO₂ concentration in the flue gas is the highest when the chicken manure blending ratio (M_pm) is 25%. Although the NO emissions fluctuate and even increase as M_pm increases, the co-combustion of coal and chicken manure exhibits a synergistic effect in reducing NO conversion rate (X_NO). The effect of pressurization on reducing NO emission is significant, X_NO at M_pm = 25% decreasing from 15% to 5% as the pressure (P) increases from 0.1 to 0.5 MPa. As P increases from 0.1 to 0.5 MPa and M_pm increases from 0% to 50%, the SO₂ emissions and conversion rates decrease. The self-desulfurization process plays an important role in the reduction of SO₂ emissions during pressurized oxy-fuel co-combustion. The aim of this work is to advance the development and application of pressurized fluidized bed oxy-fuel co-combustion technology and promote a circular bioeconomy and carbon-free waste management for biomass derived from livestock manure.

Key words: Pressurized fluidized bed, Oxy-fuel combustion, Co-firing of coal and poultry manure, Pollutant emissions

Qinwen Liu, Yiwei Zhang, Hengbing Ye, Guanwen Zhou, Yu Su, Wenli Dong, Chi-Hwa Wang, Wenqi Zhong. Combustion behavior and pollutant emissions of the pressurized fluidized bed oxy-fuel co-firing of coal and poultry manure[J]. 中国化学工程学报, 2025, 83(7): 171-181.

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Combustion behavior and pollutant emissions of the pressurized fluidized bed oxy-fuel co-firing of coal and poultry manure

Combustion behavior and pollutant emissions of the pressurized fluidized bed oxy-fuel co-firing of coal and poultry manure

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