天然气固定床羰基硫水解技术 现场试验及工业应用.

Objective The aim is to verify the stability of the fixed bed carbonyl sulfur (COS) hydrolysis process developed in the laboratory and catalyst in long-term operation under factory gas quality conditions, so as to provide basic data for process package development, industrial device design and application. Methods A 6 000 m³/d natural gas fixed-bed COS hydrolysis technology field test device was independently designed and constructed. The stability of COS hydrolysis rate of the test device for more than 16 000 h continuous operation was investigated by using the natural gas from the outlet of the wet desulfurization absorber of the factory as the test raw material. Results The experimental results showed that when the reaction temperature was greater than 70 °C and 100 °C respectively, and the volumetric space velocity was less than 6 000 h-1, the COS hydrolysis rate can be stably greater than 98% and 99%. The process and catalyst achievements were applied to the upgrading and renovation project of product gas quality in natural gas purification plants. The industrial unit operated stably for over 5 600 h, and the 72 h performance evaluation results of the unit showed that the hydrolysis reaction temperature was 100-120 °C, the carbonyl sulfur mass concentration at the reactor outlet was less than 0.3 mg/m³, and the average hydrolysis rate reached 99. 69%. Conclusions The natural gas fixed bed COS hydrolysis technology developed in the laboratory is stable and reliable, with high catalyst hydrolysis rate. It can provide a technical solution for selective desulfurization of natural gas with COS as the main organic sulfur component and high content in domestic sulfur-containing gas fields. [ABSTRACT FROM AUTHOR]