Study on Nitrogen Migration during Co-Pyrolysis of Melamine-Impregnated Paper Waste and Camellia Oleifera Shell

Zhen Zhuo, Yanling Li (), Peng Liu (), Tanglei Sun and Tingzhou Lei
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Zhen Zhuo: National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Institute of Urban and Rural Mining, Changzhou University, 21 Gehu Middle Rd, Changzhou 213164, China
Yanling Li: National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Institute of Urban and Rural Mining, Changzhou University, 21 Gehu Middle Rd, Changzhou 213164, China
Peng Liu: National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Institute of Urban and Rural Mining, Changzhou University, 21 Gehu Middle Rd, Changzhou 213164, China
Tanglei Sun: National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Institute of Urban and Rural Mining, Changzhou University, 21 Gehu Middle Rd, Changzhou 213164, China
Tingzhou Lei: National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Institute of Urban and Rural Mining, Changzhou University, 21 Gehu Middle Rd, Changzhou 213164, China

Sustainability, 2024, vol. 16, issue 3, 1-13

Abstract: Melamine-impregnated paper waste (MIPW) is an unavoidable byproduct of the melamine-impregnated paper production process, and it must be urgently disposed. In this paper, due to its high N content, MIPW was used as a N source to co-pyrolyze with camellia oleifera shell (COS). By changing the proportion of MIPW in the raw materials, the migration path of the N was studied during the co-pyrolysis process. X-ray photoelectron spectroscopy (XPS), elemental analysis (EA), total nitrogen analysis (TN) and ultraviolet spectrophotometry were used to determine the content and the types of N-containing components in raw materials and products. The results showed that during the co-pyrolysis process, the N in MIPW and COS would be converted into different types of N-containing components, and the proportion of MIPW in raw materials directly impacts the product distribution and the N migration path. With the increase in the proportion of MIPW from 10 to 50 wt.% (daf, mass ratio), the proportion of N in raw materials that migrated into the solid phase decreased from 27.58 to 16.31 wt.%, while that which migrated to the gas and liquid phases increased from 24.92 and 47.50 wt.% to 25.97 and 57.72 wt.%, respectively. The proportions of N in the raw materials that changed into pyridinic-N, pyrrolic-N and graphitic-N in the solid phase and N 2 -N in the gas phase were decreased. The proportions of NH 3 -N and HCN-N in the gas phase and NH 3 -N and organic-N in the liquid phase were increased. Moreover, synergies were observed during the co-pyrolysis process, which affected the N migration path in the raw material. This study will provide policy directions and theoretical support for the comprehensive utilization of MIPW and COS.

Keywords: biomass; co-pyrolysis; melamine-impregnated paper wastes; nitrogen migration (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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