Biessikirski Andrzej, Kaczmarczyk Grzegorz Piotr, Kuterasiński Łukasz, Machowski Grzegorz, Stopkowicz Agnieszka, Ruggiero-Mikołajczyk Małgorzata
Faculty of Civil Engineering and Resource Management, AGH University of Krakow, 30-059 Krakow, Poland.
Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Krakow, Poland.
Materials (Basel). 2024 Sep 20;17(18):4618. doi: 10.3390/ma17184618.
This study investigates the wall thickness and specific surface area (S) of ammonium nitrate(V) samples of varying provenance. The research focuses on both fertilizer-grade ammonium nitrate(V) and three porous prill samples obtained from different manufacturers. The samples were analyzed using tomography scanning and two distinct porosimetry methods. The wall thickness analysis revealed that fertilizer-grade ammonium nitrate(V) possesses thicker walls, ranging from 0.05 to 0.40 mm, compared to porous prill-type ammonium nitrate(V), which predominantly exhibited wall thicknesses between 0.05 and 0.025 mm, with occasional thicker regions up to 0.040 mm. These variations in wall thickness are likely attributable to differences in manufacturing processes and prilling conditions specific to the ammonium nitrate(V) porous prill-type samples. The specific surface area (S), derived from nitrogen adsorption measurements, indicated that the samples exhibited surface areas ranging from 0.011 to 0.466 m·g, suggesting that these samples do not exhibit particularly high absorption capacities. However, the S values obtained from the mercury intrusion method suggested significantly higher absorption capacities, falling within the range of 4.87-18.29 m·g. These findings suggest that mercury porosimetry may provide a more accurate assessment of the porosity and absorption potential of ammonium nitrate(V) samples.
本研究调查了不同来源的硝酸铵（V）样品的壁厚和比表面积（S）。研究重点是肥料级硝酸铵（V）以及从不同制造商获得的三个多孔颗粒样品。使用断层扫描和两种不同的孔隙率测定方法对样品进行了分析。壁厚分析表明，与多孔颗粒型硝酸铵（V）相比，肥料级硝酸铵（V）的壁更厚，范围为0.05至0.40毫米，而多孔颗粒型硝酸铵（V）的壁厚主要在0.05至0.025毫米之间，偶尔有厚至0.040毫米的区域。壁厚的这些变化可能归因于硝酸铵（V）多孔颗粒型样品特定的制造工艺和造粒条件的差异。通过氮吸附测量得出的比表面积（S）表明，样品的表面积范围为0.011至0.466平方米·克，这表明这些样品没有表现出特别高的吸附能力。然而，通过压汞法获得的S值表明吸附能力明显更高，在4.87 - 18.29平方米·克范围内。这些发现表明，压汞孔隙率测定法可能为硝酸铵（V）样品的孔隙率和吸附潜力提供更准确的评估。
