Magazine: Sulphur

Small quantities of sulphur in a refinery or gas feed can present challenges for conventional large scale sulphur recovery techniques.

With increased demands to reduce SO2 emissions and lower energy consumption, Clark Solutions highlights the advantages of single absorption sulphuric acid plants compared to double absorption plants.

MECS, Inc. (MECS) has developed a new impaction-based mist eliminator called Brink® Prime Impact™ , which offers equivalent or improved efficiency at higher throughput and the same pressure drop as traditional impaction beds, resulting in the ability to debottleneck existing inter-pass absorption towers and final absorption towers in sulphuric acid plants or design new or replacement towers with smaller diameters, thus reducing investment cost.

Sulphur prices declined in Q4 following the increases seen during Q3, because of ample availability and limited spot demand. One contributing factor was that phosphate fertilizer producers in China, the largest importer of sulphur, have cut downstream production due to increased export restrictions. In addition, high sulphur stocks at Chinese ports and continuing high domestic sulphur production mean that domestic buyers have other options aside from international purchases.

“ The need for technical knowledge and insights has never been more important.”

This case study reports on the successful collaboration of two experienced partner companies to replace the problematic upper part of a co-current flow quench tower in a spent acid plant and shows the benefits of using resistant, pre-lined workshop fabricated equipment.

Sulphur prices are expected to increase during H1 2024, reversing the trend of recent declines, though good availability will limit the upside to price gains in the short term. However, should fertilizer production prove weaker than expected, prices may remain below expected levels.

Axens has developed a new titania-based catalyst named CRS 41, which has a much larger porosity than its renowned predecessor, CRS 31 catalyst. Thanks to an improved catalyst manufacturing process and a new recipe, the porosity of CRS 41 has been increased while preserving the mechanical resistance for loading, allowing customers to optimise their capex by either reducing the Claus reactor size or loading volume of TiO2 catalyst.

Volatility in sulphur prices has been reduced in the past year following the large price spike and subsequent drop in the summer of 2022. This price volatility has been due to various disrupted seasonal trends from the global pandemic, uneven recovery, geopolitical shifts and demand destruction for fertilizers.

First Quantum Minerals Ltd. has contracted with MECS, Inc. (MECS), a subsidiary of Elessent Clean Technologies, for the Kansanshi smelter expansion at the Kansanshi mine at Solwezi. MECS’ scope of work will include a redesign of the existing sulphur-burning sulphuric acid plant into a copper smelter off-gas recovery sulphuric acid plant. This transition to a copper smelter off-gas recovery acid plant will enable First Quantum to reduce emissions from the existing copper smelter, increase production at the mine, and supply more copper to the global market, which will enable the adoption of greener technologies. MECS’ design for First Quantum incorporates proprietary technologies such as MECS® catalyst for low emissions and high conversion, Brink® mist eliminators, ZeCor® alloy towers and pump tank and UniFlo® acid distributor technology for operational reliability and efficiency.