紫外吸收法测定天然气中硫化氢含量的研究

A Study on the Determination of Hydrogen Sulfide in Natural Gas by Ultraviolet Absorption Method

丁思家 刘鸿 杨雅冰 蔡黎 徐微风

DINGSijia LIUHong YANGYabing CAILi XUWeifeng

中国石油西南油气田分公司输气管理处，四川 成都 610213 中国石化石油工程设计有限公司，山东 东营 257000 中国石油西南油气田分公司天然气研究院，四川 成都 610213 中国石油西南油气田公司华油公司川西北分公司，四川 德阳 618300

Gas Transmission Management of Department, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610213, China Petroleum Engineering Corporation, SINOPEC, Dongying, Shangdong 257000, China Research Institute of Natrual Gas Technology, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610213, China Sichuang Huayou Group Corporation Limited, Southwest Oil & Gas Field Company, PetroChina, Deyang, Sichuan 618300, China

针对测定天然气中硫化氢含量的紫外吸收法目前还缺乏国家标准的问题，在不同机构开展该原理仪器的一系列比对测试研究，采用GB/T 6683\dash 1997《石油产品试验方法精密度数据确定法》对数据处理，获得紫外吸收法测定硫化氢含量的重复性和再现性要求，明确了该检测方法的结果判定依据，为编制该方法的国家标准起到了重要作用。同时，研究中还采用了与碘量法进行比对实验研究，结果表明，在现场工况条件下，相对人工化学滴定的方法而言，紫外吸收法通过仪器可以将更多的影响因素控制在较低的随机水平上，检测结果显得更加稳定和可控。另外，通过7个月的持续稳定性试验数据表明，该方法的测试稳定性表现极好，具备在线监测管输气硫化氢含量的长期稳定性和准确性需求。

Aiming at the problem for the ultraviolet absorption method in the determination of hydrogen sulfide content in natural gas, is still lack of national standards, a series of comparative tests of the instruments are carried out in different institutions, and data are processed according to Petroleum products–Determination of precision data in relation to methods of test(GB/T 6683-1997), requirements of the repeatability and reproducibility of UV absorption method for determination of hydrogen sulfide content are obtained, and the determination of the test results is made clear, which plays an important role in the preparation of the national standard of this method. At the same time, the comparative experiment with iodometric method is also used in the study. The results show that, compared with the artificial chemical titration method, the ultraviolet absorption method can control more influencing factors at a lower random level through the instrument, so it appears more stable and controllable. In addition, the continuous stability test data of 7 months show that stability of the test this method is excellent, and it has the long-term stability and accuracy requirements for online monitoring of hydrogen sulfide content in pipeline gas.

10.11885/j.issn.16745086.2020.05.15.01