Prakoso Tirto, Widodo Andreas, Indarto Antonius, Mariyana Rina, Arif Aditya Farhan, Adhi Tri Partono, Soerawidjaja Tatang Hernas
Department of Chemical Engineering, Institut Teknologi Bandung, Labtek X, Kampus ITB, Jalan Ganesha 10, Bandung, 40132, Indonesia.
PT. Energy Management Indonesia (EMI), Jl. Pancoran Indah I No. 52, Jakarta, Indonesia.
Heliyon. 2020 Feb 10;6(2):e03358. doi: 10.1016/j.heliyon.2020.e03358. eCollection 2020 Feb.
Iron chelate liquid redox sulfur recovery (LRSR) has been one of the most frequently recommended technologies for the oxidation of HS in natural gas into elemental sulfur, particularly when the acid gas has a high CO/HS molar ratio. The process is however known to suffer from extensive oxidative ligand degradation that results in high operational costs. Moreover, poor biodegradability or toxicity of the existing ligand has become a concern. In this research, we demonstrated that gluconate, a naturally greener ligand, when coupled with manganese as the metal, has considerable potential to be a better redox agent. Manganese gluconate solution was more resistant against ligand degradation compared with iron NTA. As required, aerated solution was capable of converting dissolved NaHS into elemental sulfur. At sufficiently high pH, manganese gluconate solutions were stable enough from precipitation of manganese hydroxide, carbonate, or sulfides. An equilibrium calculation has been developed to understand the precipitation behavior.
铁螯合物液体氧化还原硫回收（LRSR）一直是将天然气中的硫化氢氧化为元素硫最常推荐的技术之一，特别是当酸性气体具有高CO₂/H₂S摩尔比时。然而，已知该工艺会遭受广泛的氧化配体降解，从而导致高昂的运营成本。此外，现有配体的生物降解性差或毒性已成为一个问题。在本研究中，我们证明了葡萄糖酸盐，一种天然更环保的配体，与锰作为金属结合时，有很大潜力成为更好的氧化还原剂。与铁-NTA相比，葡萄糖酸锰溶液对配体降解更具抗性。根据需要，曝气溶液能够将溶解的硫氢化钠转化为元素硫。在足够高的pH值下，葡萄糖酸锰溶液足够稳定，不会沉淀出氢氧化锰、碳酸锰或硫化物。已经开发了一个平衡计算来理解沉淀行为。
