The merchant market for sulphuric acid is only a small slice of overall global acid demand, dominated by smelter acid producers. Increasing replacement of acid imports by dedicated sulphur burning acid plants by end use consumers is reducing the scope for merchant sales and could lead to overcapacity in the near term.
Anggi Arifin Nasution and Aldifi Putro of PT Petrokimia Gresik detail an inventive redesign of their economiser, a critical component in sulphuric acid production, focusing on energy efficiency, decarbonisation, process optimisation, and equipment durability.
In spite of changing patterns of demand, deglobalisation and environmental concerns, phosphate mining and acid-based processing are likely to be the mainstay of the industry for years to come.
A softer trend in DAP prices, linked to lower operating rates in China and declining demand, is contributing to falling sulphur prices.
M. Rameshni and S. Santo of Rameshni & Associates Technology & Engineering (RATE USA) discuss some of the many solutions available to revamp sulphur plants to meet stricter environmental regulations with regard to SO2 and CO2 emissions. RATE technologies for the ultimate goal of achieving near zero SO2 emissions and World Bank requirements are also illustrated.
Tecnimont, part of MAIRE’s Integrated E&C Solutions business unit, has signed a letter of award with ADNOC for the onshore processing plant of the Hail and Ghasha Development Project. The award was signed at ADIPEC, the world’s largest energy summit. The project aims to operate with net zero CO 2 emissions, in part due to the facility’s CO 2 carbon capture and recovery units, which will allow the capture and storage of CO 2 . The project will capture 1.5 million t/a of CO 2 , taking ADNOC’s committed carbon capture capacity to almost 4 million t/a. The company recently announced its decision to double its carbon capture capacity to 10 million t/a by 2030. The Hail and Ghasha CO 2 will be captured, transported onshore and stored underground, while low-carbon hydrogen will be produced to replace fuel gas and further reduce emissions, according to ADNOC. The project will also use power from nuclear power plants and renewable sources from the grid.
A report on CRU’s annual Sulphur + Sulphuric Acid conference, held in New Orleans, USA, 6-8 November 2023.
A sulphuric acid plant in Northwest China is looking to capture its low-grade heat for re-use. With the support of Alfa Laval’s semi-welded plate heat exchangers and energy recovery expertise, in winter, all of the recovered low-grade heat could be put back into their system with 30% being used in production and the remaining 70% going to heating. During the summer, 14% of the energy that is no longer needed for indoor heating could be used to preheat boiler feedwater. This would enable them to significantly reduce the amount of fossil fuels used in production, without redesigning their entire factory footprint.
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.