44 By comparing samples with varying poplar wood charcoal content among different sintering raw materials, we observed a decreasing trend in the peak intensity of nitrogen oxides in the XPS spectra as the content of poplar wood charcoal increased, i.e. , samples A1–A7.
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The mechanism of NO<sub><i>x</i></sub> removal in the sintering process based on source reduction of carbon emissions.
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The sentences
Analysis of the EDS characterization results for samples A1–A7 revealed a clear trend: as the amount of poplar wood biochar used in the samples increased, the nitrogen content in these samples showed a gradual decrease.