Boczkaj Grzegorz, Momotko Malwina, Przyjazny Andrzej, Kamiński Marian
Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, Gdansk, Poland.
Kettering University, Flint, MI, USA.
J Sep Sci. 2016 Feb;39(4):748-55. doi: 10.1002/jssc.201501127. Epub 2016 Jan 8.
We present the results of investigations of the chromatographic (sorptive) properties of silanized silica gel as a stationary phase for gas chromatography used for simulated distillation. Commercially available silanized sorbent (particle diameter range 63-200 μm, average pore size 60 Å) was sieved to obtain the 80-100 mesh fraction (180-150 μm). The obtained results revealed that silanized silica gel allows the complete separation of a mixture of n- and iso-alkanes in the C1 -C7 range. Such a separation is achieved with a temperature program starting with an initial temperature of 50˚C, which is advantageous because the gas chromatograph oven does not have to be cooled below room temperature. The use of temperature programming with a final temperature of 300˚C ensures separation and elution of all mixture components from C1 to n-C28 in one run. This study confirms the applicability of silanized silica gel as a stationary phase for the investigation of distillation temperature distribution of gasoline and diesel fuel based on the simulated distillation procedure according to ASTM D2887. The deviations of individual points of distillation curve obtained using ASTM D2887 and columns packed with silanized silica gel were within the reproducibility range of the standard procedure.
我们展示了用于模拟蒸馏的气相色谱固定相——硅烷化硅胶的色谱（吸附）性能研究结果。将市售硅烷化吸附剂（粒径范围63 - 200μm，平均孔径60Å）筛分以获得80 - 100目级分（180 - 150μm）。所得结果表明，硅烷化硅胶能够完全分离C1 - C7范围内的正构和异构烷烃混合物。这种分离通过从50˚C初始温度开始的程序升温实现，这是有利的，因为气相色谱柱箱无需冷却至室温以下。使用最终温度为300˚C的程序升温可确保在一次运行中分离并洗脱从C1到正C28的所有混合物组分。本研究证实了硅烷化硅胶作为固定相，基于ASTM D2887模拟蒸馏程序用于研究汽油和柴油燃料蒸馏温度分布的适用性。使用ASTM D2887和填充硅烷化硅胶的色谱柱获得的蒸馏曲线各点偏差在标准程序的重现性范围内。
