It has been shown that the carbon soot produced as a byproduct of partial oxidation of methane consists of carbon nanoparticles of almost ideal spherical morphology and perfect concentric onion-like structure. The particles are unusually big for carbon onions and have outer diameter of 10 to 50 nm while the inner cage is rather typical for onions and has diameter below 1 nm. The concentric graphitic structure and spherical symmetry along with the absence of amorphous carbon are confirmed by transmission electron microscopy, electron diffraction, EDX spectroscopy and Raman investigation. The spherical particles get deposited on a wall of a partial oxidation reactor as loose particles embedded in a low density organic ovary, which can be detected by its luminescence or by cautious electron microscopy imaging. It is important that unlike literature reports on giant onions, the carbon deposit was dominated by these giant spheres. This process may be considered as a prototype for a production method for giant concentric shell carbon particle black.

已经表明，作为甲烷部分氧化的副产物而产生的碳烟灰由具有几乎理想的球形形态和完美的同心洋葱状结构的碳纳米颗粒组成。对于碳洋葱而言，这些颗粒异常大，外径为10至50 nm，而对于洋葱，内笼则更为典型，其直径小于1 nm。通过透射电子显微镜，电子衍射，EDX光谱和拉曼研究证实了同心石墨结构和球形对称性以及不存在无定形碳。球形颗粒以嵌入低密度有机卵巢中的松散颗粒的形式沉积在部分氧化反应器的壁上，这可以通过其发光或通过谨慎的电子显微镜成像来检测。重要的是，与关于巨型洋葱的文献报道不同，碳沉积物被这些巨型球所占据。该方法可以被认为是用于巨型同心壳炭黑的生产方法的原型。