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首页> 外文会议>2001 International gas research conference >TESTING OF ADSORBENTS FOR REMOVAL OF TEG FROM THE NATURAL GAS FEED-STREAM IN AN NGL EXTRACTION PLANT
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TESTING OF ADSORBENTS FOR REMOVAL OF TEG FROM THE NATURAL GAS FEED-STREAM IN AN NGL EXTRACTION PLANT

机译：NGL提取厂中天然气进料中去除TEG的吸附剂测试

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摘要

Natural gas is transported from the offshore gas fields in the North-Sea to the Statpipe NGL extraction plant at Karste through a high pressure dense gas pipeline. The gas is dried offshore to pipeline specification by use of TEG (three-ethylene glycol) absorption. Due to carry-over of TEG offshore and condensation of TEG in the pipeline, operational problems have been experienced at the Karste plant. The problems have been related to degradation of a molecular sieve unit in the plant and to reduction of recovery due to fouling of heat exchangers. The transport mechanism for TEG in the dense gas phase is not well known. It is anticipated that TEG is carried through the pipeline both as small droplets or aerosol, as film at the wall and as solved component in the gas. A test unit has been developed and several types of adsorbents, silica gel, activated alumina and molecular sieve, have been tested. The TEG concentration in the gas has been measured by use of a new ATD-GC technique (Automatic Thermal Desorption). Based on the different tests, silica gel has been selected as adsorbent. A multi-layer bed with silica gel and molecular sieve is proposed in order to remove TEG from the natural gas before entering the NGL extraction unit.
机译：天然气从北海的海上气田通过高压致密气管道输送到喀斯特的Statpipe NGL提取厂。通过使用TEG（三甘醇）吸收，将天然气在海上干燥至管道规格。由于TEG在海上结转和TEG在管道中凝结，因此在Karste工厂遇到了运行问题。这些问题与工厂中分子筛单元的降解以及与热交换器结垢导致的回收率降低有关。在致密气相中TEG的传输机理尚不清楚。可以预料的是，TEG既可以作为小液滴或气溶胶，也可以作为壁上的薄膜，也可以作为气体中的溶解成分通过管道输送。已经开发了测试单元，并且已经测试了几种类型的吸附剂，硅胶，活性氧化铝和分子筛。气体中的TEG浓度已通过使用新的ATD-GC技术（自动热脱附）进行了测量。根据不同的测试，已选择硅胶作为吸附剂。为了在进入NGL萃取装置之前从天然气中除去TEG，提出了一种具有硅胶和分子筛的多层床。

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