Nitrogen Transformation during Pyrolysis of Various N-Containing Biowastes with Participation of Mineral Calcium

	Nitrogen Transformation during Pyrolysis of Various N-Containing Biowastes with Participation of Mineral Calcium
	Nan, Hongyan; Xiao, Ziyue; Zhao, Ling; Yang, Fan; Xu, Huacheng; Xu, Xiaoyun; Qiu, Hao
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	2020
卷号	8 期号:32 页码:12197-12207
英文摘要	Nitrogen (N) is one of the nutrients embedded in biowastes and its speciation in solid-liquid-gas pyrolysis products is closely related to environmental issues such as the greenhouse effect, acid rain, and eutrophication. This study investigated the distribution and evolution of N species during pyrolysis of various biowaste matrixes, and the roles of exogenous mineral calcium (CaCl2) in regulating N transformation were explored. The results showed that these biowastes show a similar tendency for the conversion of protein-N (70-90% in biowaste) into char-N (25-35%), oil-N (15-30%), and gas-N (30-60%). Exogenous Ca did not alter total char-N yield, while it promoted the conversion of protein/pyridine-N into pyrrole/quaternary-N, which could mitigate N loss as a cause of eutrophication; Ca catalyzed the cracking of N-containing macromolecules in bio-oil, especially amine, and therefore, drove N migrating from the liquid phase to gas phase. This would benefit the recycle of bio-oil as a fuel. In gas, the significant decrease of harmful HCN accompanied by a remarkable increase of NH3 and N-2 were observed. Detection by thermogravimetric analysis-Fourier transform infrared spectrometry-gas chromatography mass spectrometry confirmed that mineral Ca intensified N-related reactions, including dehydration, decarboxylation, dehydrogenation, and deamination of protein-N. This study could guide pyrolytic production and subsequent application of biochar/biofuel, as well as exhaust gas collection regarding N recovery and pollution control.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/19924]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Nan, Hongyan,Xiao, Ziyue,Zhao, Ling,et al. Nitrogen Transformation during Pyrolysis of Various N-Containing Biowastes with Participation of Mineral Calcium[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2020,8(32):12197-12207.
APA	Nan, Hongyan.,Xiao, Ziyue.,Zhao, Ling.,Yang, Fan.,Xu, Huacheng.,...&Qiu, Hao.(2020).Nitrogen Transformation during Pyrolysis of Various N-Containing Biowastes with Participation of Mineral Calcium.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,8(32),12197-12207.
MLA	Nan, Hongyan,et al."Nitrogen Transformation during Pyrolysis of Various N-Containing Biowastes with Participation of Mineral Calcium".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 8.32(2020):12197-12207.