注入一些化学品对较少回收 MEG 的 MEG 抑制性能的影响,Energy & Fuels

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注入一些化学品对较少回收 MEG 的 MEG 抑制性能的影响
Energy & Fuels ( IF 5.2 ) Pub Date : 2023-04-13 , DOI: 10.1021/acs.energyfuels.3c00061
Dana Badi ₁ , Ammar Al Helal _{2,

3} , Chris Lagat ₁ , Chi Phan ₄ , Ahmed Barifcani ₁

Affiliation

单乙二醇 (MEG) 通常从海上石油和天然气平台注入海底运输管道，以抑制水合物的形成。MEG 可以通过陆上的 MEG 再生厂回收，用于再循环。与水合物抑制操作相关的成本很高；因此，引入减少系统所需 MEG 体积的新方法可能会为运营带来显着的经济效益。本研究的目的是评估氢氧化铵 (NH ₄ OH)、氢氧化钠 (NaOH)、氢氧化钾 (KOH) 和甲基二乙醇胺 (MDEA) 分别与 MEG 20 wt% 溶液混合时对抑制性能的影响在甲烷气体系统中。对于 NaOH、KOH、NH，应用的 pH 水平分别为 10.96、10.84、10.62 和 10.07_分别为4 OH 和 MDEA。结果表明，与正常的 MEG 20 wt% 溶液相比，这些化合物在不同程度上抑制了水合物离解温度。在 MDEA、KOH 和 NaOH 的情况下，温度在整个压力范围内平均降低 0.72、0.78 和 0.94 °C。然而，当与 NH ₄ OH 结合时，解离温度的降低更为显着，平均为 1.68 °C。_{通过与 NH 4}的结合，将抑制温度降低这一数量的好处的经济评估OH，表明在 MEG 再生过程中可节省约 17% 的运营成本。这种成本降低水平将引起海上天然气生产行业的极大兴趣。

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Influence of Injecting Some Chemicals on MEG Inhibition Performance for Less Recycled MEG

Monoethylene glycol (MEG) is often injected into submarine transportation pipelines, from offshore oil and gas platforms, to suppress hydrate formation. MEG can be recovered, for recycling, through a MEG regeneration plant, onshore. The costs related to hydrate inhibition operations are significant; thus, introducing new methods of reducing the volumes of MEG required by the system potentially will provide significant economic benefits for the operation. The objectives of this study were to evaluate the influence of ammonium hydroxide (NH₄OH), sodium hydroxide (NaOH), potassium hydroxide (KOH), and methyl diethanolamine (MDEA) on inhibition performance when separately combined with a MEG 20 wt % solution in a methane gas system. The pH levels applied were 10.96, 10.84, 10.62, and 10.07 for NaOH, KOH, NH₄OH, and MDEA, respectively. The results indicated that these compounds suppressed the hydrate dissociation temperatures, to different degrees, when compared with a normal MEG 20 wt % solution. The temperatures were reduced by an average, across the range of pressures, of 0.72, 0.78, and 0.94 °C in the case of MDEA, KOH, and NaOH, respectively. However, when combined with NH₄OH, the reduction in dissociation temperature was even more significant, averaging 1.68 °C. An economical assessment of the benefits of reducing the inhibition temperature by this amount, through the combination with NH₄OH, indicated an operational cost saving of about 17% within the MEG regeneration process. This level of cost reduction will be of significant interest to the offshore gas-producing industry.

更新日期：2023-04-13

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