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Catalytic Pyrolysis of Ammonium Sulfate Wastewater via CuO-Based Chemical Looping for Resource Recovery of Ammonia and Sulfur
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Zhiye YUAN1, Weilou MA1, Juexi CHEN2, Yuxin YI1, Chuye CHEN1, Zhaoru CHEN1, Lishan YANG1, 3
Mining and Metallurgical Engineering | 2026, 46(4) : 163 - 168
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Mining and Metallurgical Engineering | 2026, 46(4): 163-168
• METALLURGY •
Catalytic Pyrolysis of Ammonium Sulfate Wastewater via CuO-Based Chemical Looping for Resource Recovery of Ammonia and Sulfur
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Zhiye YUAN1, Weilou MA1, Juexi CHEN2, Yuxin YI1, Chuye CHEN1, Zhaoru CHEN1, Lishan YANG1, 3
Affiliations
  • 1.Xiangtan Electrochemical Scientific Co., Ltd., Xiangtan 411102, Hunan, China
  • 2.College of Environment and Resources, Xiangtan University, Xiangtan 411000, Hunan, China
  • 3.College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, Hunan, China
doi: 10.3969/j.issn.0253-6099.2026.04.025
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Aiming at the bottleneck that NH3 and SO2 generated during ammonium sulfate pyrolysis tend to spontaneously recombine and are difficult to be separated efficiently, an integrated process consisting of crystallization, pyrolysis and recycling, with CuO as the oxygen carrier in chemical looping was proposed. Experimental results indicate that the ammonia release rate exceeds 96% at the ammonia releasing stage after reaction at 400 ℃, with ammonium sulfate and copper oxide in a molar ratio of 1∶1.5. While at the sulfur releasing stage, after 90 min reaction at 750 ℃, sulfur release rate is over 98%. It is found that after five cycles of CuO-based chemical looping pyrolysis, both the ammonia-release and sulfur-release rates remain higher than 95%, and CuO also can be regenerated via air calcination. This process provides a feasible technical route for resource utilization of nitrogen-containing wastewater.

ammonium sulfate wastewater  /  catalytic pyrolysis  /  CuO  /  ammonia-sulfur resource recovery  /  recycling  /  nitrogen-containing wastewater  /  wastewater treatment
袁治冶, 马伟楼, 陈珏锡, 易雨馨, 陈楚烨, 陈昭如, 杨立山. CuO化学链催化热解硫酸铵废水及氨硫资源化回收. 矿冶工程杂志, 2026 , 46 (4) : 163 -168 . DOI: 10.3969/j.issn.0253-6099.2026.04.025
Zhiye YUAN, Weilou MA, Juexi CHEN, Yuxin YI, Chuye CHEN, Zhaoru CHEN, Lishan YANG. Catalytic Pyrolysis of Ammonium Sulfate Wastewater via CuO-Based Chemical Looping for Resource Recovery of Ammonia and Sulfur[J]. Mining and Metallurgical Engineering, 2026 , 46 (4) : 163 -168 . DOI: 10.3969/j.issn.0253-6099.2026.04.025
Appendix
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Year 2026 volume 46 Issue 4
121
20
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Article Info
doi: 10.3969/j.issn.0253-6099.2026.04.025
  • Receive Date：2026-01-26
  • Online Date：2026-10-08
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  • Received：2026-01-26
Funding
Affiliations
    1.Xiangtan Electrochemical Scientific Co., Ltd., Xiangtan 411102, Hunan, China
    2.College of Environment and Resources, Xiangtan University, Xiangtan 411000, Hunan, China
    3.College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, Hunan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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