Manganese gluconate, A greener and more degradation resistant agent for H2S oxidation using liquid redox sulfur recovery process

Heliyon

Antonius Indarto¹  Rina Mariyana²  Tirto Prakoso²  Tatang Hernas Soerawidjaja²  Andreas Widodo³  Aditya Farhan Arif⁴  Tri Partono Adhi⁴ 

[1]Corresponding author.

[2]Department of Chemical Engineering, Institut Teknologi Bandung, Labtek X, Kampus ITB, Jalan Ganesha 10, Bandung, 40132, Indonesia

[3]PT. Energy Management Indonesia (EMI), Jl. Pancoran Indah I No. 52, Jakarta, Indonesia

[4]PT. Rekayasa Industri (REKIND), Jl. Kalibata Timur I No. 36, Jakarta, Indonesia

关键词: Chemical engineering;    Environmental chemical engineering;    Industrial chemistry;    Environmental chemistry;    Environmental hazard;    Manganese gluconate;   

DOI  :  

来源: DOAJ

【 摘 要 】

Iron chelate liquid redox sulfur recovery (LRSR) has been one of the most frequently recommended technologies for the oxidation of H2S in natural gas into elemental sulfur, particularly when the acid gas has a high CO2/H2S 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.

【 授权许可】

Unknown