MODELLING THE FIELDS OF POLLUTANT DISPERSION IN THE ATMOSPHERE FROM FLARES

IF 0.4 Q4 CHEMISTRY, MULTIDISCIPLINARY Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI:10.15372/csd2024537
 N. ALEKSEEVA M,  V. FEDOROV D,  V. RUSSKIKH I,  G. YASHCHENKO I
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Abstract

The fields of pollutant dispersion in the air from three operating flare installations at the territory of the Mamontovskoye field in the Nefteyugansk District of the Khanty-Mansi Autonomous Territory were modelled on the basis of climatic data and technological parameters of flare installations. The amounts of pollutants entering the atmosphere from associated petroleum gas combustion were calculated: carbon monoxide (CO) - 83 %, nitrogen dioxide (NO2) - 0.7 %, soot - 10 %, methane - 6 %. The vegetation cover was mapped relying on the Sentinel-2 satellite image with the shooting date of June 14, 2021, displaying dispersion fields for СО, NO2 and soot. The distances from emission source (flare installation) to isolines with CO and soot concentrations equal to 1 MPCst (5 and 0.15 mg/m3) are 163 and 505 m, respectively (here MPCst is the maximum permissible concentration for short-term exposure level). Similarly, measured distance to the isoline with NO2 concentration 0.1 MPCst concentration (0.02 mg/m3) is 284 m. On average, CO concentration decreases by 1 mg/m3 at a distance of 86 m and becomes equal to 0.2 mg/m3 (0.04 MPCst) at a distance of about 572 m. The resulting model for CO dispersion does not contradict MERRA-2 satellite data, according to which the concentration of CO in the vicinity of the flare installation was 0.2 mg/m3. The gas chromatographic - mass spectrometric analysis of soil samples and plants collected to the north-east from the flare installation at a distance of 216, 486, 710, 1037 and 1380 m has shown that aliphatic hydrocarbons prevail in the composition of soil organic matter. Their content varies from 50 to 80 % of all identified compounds, with the predominance of high-molecular homologues (C27-C33). The maximum total amount of n-alkanes (75.3 μg/g) was detected in the soil sample taken at a distance of 710 m from the flare installation. In the organic matter of pine needles and blueberry leaves, C27 homologue dominates, and C25, C29, C31 characteristic of terrestrial vegetation are present. In addition, polyaromatic compounds were identified in the soil: anthracene/phenanthrene, fluoranthene and pyrene.
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模拟耀斑在大气中的污染物扩散场
根据气候数据和火炬装置的技术参数,对汉特-曼西自治边疆区 Nefteyugansk 地区 Mamontovskoye 油田境内三个运行中的火炬装置在空气中的污染物扩散区域进行了模拟。计算了伴生石油气燃烧进入大气的污染物量:一氧化碳 (CO) - 83%、二氧化氮 (NO2) - 0.7%、烟尘 - 10%、甲烷 - 6%。根据拍摄日期为 2021 年 6 月 14 日的哨兵-2 号卫星图像绘制了植被覆盖图,显示了СО、二氧化氮和烟尘的扩散区域。从排放源(火炬装置)到二氧化碳和烟尘浓度等于 1 MPCst(5 和 0.15 mg/m3)的隔离带的距离分别为 163 米和 505 米(此处 MPCst 为短期暴露水平的最大允许浓度)。同样,测量到二氧化氮浓度为 0.1 毫克/立方米(0.02 毫克/立方米)的隔离带的距离为 284 米。平均而言,一氧化碳浓度在距离 86 米时下降 1 毫克/立方米,在距离约 572 米时降至 0.2 毫克/立方米(0.04 毫克/立方米)。在距离火炬装置 216 米、486 米、710 米、1037 米和 1380 米处的东北方向采集的土 壤样本和植物的气相色谱-质谱分析表明,脂肪族碳氢化合物在土壤有机物成分中占 主导地位。在所有已识别的化合物中,脂肪烃的含量从 50% 到 80% 不等,主要是高分子同系物(C27-C33)。在距离火炬装置 710 米处采集的土壤样本中检测到的正构烷烃总量最大(75.3 微克/克)。在松针和蓝莓叶的有机物中,C27 同系物占主导地位,而陆地植被所特有的 C25、C29 和 C31 也存在。此外,在土壤中还发现了多芳香族化合物:蒽/菲、荧蒽和芘。
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Chemistry for Sustainable Development
Chemistry for Sustainable Development CHEMISTRY, MULTIDISCIPLINARY-
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52
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