Characteristics of ammonia emission during thermal drying of lime sludge for co-combustion in cement kilns

Characteristics of ammonia emission during thermal drying of lime sludge for co-combustion in cement kilns

Thermal drying was used to reduce sludge moisture content before co-combustion in cement kilns. The characteristics of ammonia (NH3) emission during thermal drying of lime sludge (LS) were investigated in a laboratory-scale tubular dry furnace under different temperature and time conditions. As the...

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Veröffentlicht in:Environmental technology. - 1998. - 36(2015), 1-4 vom: 14. Jan., Seite 226-36
1. Verfasser: Liu, Wei (VerfasserIn)
Weitere Verfasser: Xu, Jingcheng, Liu, Jia, Cao, Haihua, Huang, Xiang-Feng, Li, Guangming
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't ammonia emission cement kilns co-combustion lime sludge thermal drying Air Pollutants Calcium Compounds Oxides mehr... Sewage Ammonia 7664-41-7 lime C7X2M0VVNH
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520 |a Thermal drying was used to reduce sludge moisture content before co-combustion in cement kilns. The characteristics of ammonia (NH3) emission during thermal drying of lime sludge (LS) were investigated in a laboratory-scale tubular dry furnace under different temperature and time conditions. As the temperature increased, the NH3 concentration increased in the temperature range 100-130°C, decreased in the temperature range 130-220°C and increased rapidly at >220°C. Emission of NH3 also increased as the lime dosage increased and stabilized at lime dosages>5%. In the first 60 min of drying experiments, 55% of the NH3 was released. NH3 accounted for about 67-72% of the change in total nitrogen caused by the release of nitrogen-containing volatile compounds (VCs) from the sludge. X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy revealed that the main forms of nitrogen in sludge were amides and amines. The addition of lime (CaO) could cause conversion of N-H, N-O or C-N containing compounds to NH3 during the drying process 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a ammonia emission 
650 4 |a cement kilns 
650 4 |a co-combustion 
650 4 |a lime sludge 
650 4 |a thermal drying 
650 7 |a Air Pollutants  |2 NLM 
650 7 |a Calcium Compounds  |2 NLM 
650 7 |a Oxides  |2 NLM 
650 7 |a Sewage  |2 NLM 
650 7 |a Ammonia  |2 NLM 
650 7 |a 7664-41-7  |2 NLM 
650 7 |a lime  |2 NLM 
650 7 |a C7X2M0VVNH  |2 NLM 
700 1 |a Xu, Jingcheng  |e verfasserin  |4 aut 
700 1 |a Liu, Jia  |e verfasserin  |4 aut 
700 1 |a Cao, Haihua  |e verfasserin  |4 aut 
700 1 |a Huang, Xiang-Feng  |e verfasserin  |4 aut 
700 1 |a Li, Guangming  |e verfasserin  |4 aut 
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773 1 8 |g volume:36  |g year:2015  |g number:1-4  |g day:14  |g month:01  |g pages:226-36 
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