Paewpanchon P, Chanyotha S
Department of Nuclear Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
Radiat Prot Dosimetry. 2017 Nov 1;177(1-2):40-44. doi: 10.1093/rpd/ncx145.
A technique for the determination of the radon concentration in natural gas using charcoal adsorption has been developed to study the effects of parameters that influence the adsorption efficiency of radon onto activated charcoal. Several sets of experiments were conducted both in the laboratory and in an actual natural gas field for comparison. The results show that the adsorption capability of radon onto activated charcoal varies inversely with temperature, hydrocarbon concentration and the humidity contained within the natural gas. A technique utilizing dry ice as a coolant was found to be the most effective for trapping radon in natural gas samples at the production site. A desiccant can be used to remove moisture from the sampling gas. The technique described here increases the adsorption efficiency of activated charcoal by 10-20% compared to our previous study.
已开发出一种利用木炭吸附测定天然气中氡浓度的技术，以研究影响氡在活性炭上吸附效率的参数的影响。在实验室和实际天然气田中进行了几组实验以作比较。结果表明，氡在活性炭上的吸附能力与温度、烃浓度以及天然气中所含湿度成反比。发现利用干冰作为冷却剂的技术对于在生产现场捕获天然气样品中的氡最为有效。可使用干燥剂去除采样气体中的水分。与我们之前的研究相比，此处所述技术将活性炭的吸附效率提高了10%至20%。
