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Magazine: Sulphur

Producing sulphuric acid from gas streams with variable SO2

The first installed combination of a regenerative SO2 scrubbing system with a sulphuric acid plant using Worley Chemetics’ CORE™ reactor technology started up in November 2022. The combination of these technologies allows production of high-grade sulphuric acid from gases with low and/or fluctuating SO2 concentrations. C. Trujillo Sanchez and R. Dijkstra of Worley Chemetics report on the design concepts of this integrated process, highlight where it is most effective and report on the start-up and first years of operation of the plant.

People

ADNOC Gas has appointed Fatema Al Nuaimi as its new Chief Executive Officer, effective January 1st, 2025. This appointment follows the resignation of Ahmed Alebri, who led the company for nearly two years and has assumed the role of CEO at ADNOC Sour Gas. Al Nuaimi, an accomplished industry leader with extensive experience within ADNOC’s gas and energy sectors, is tasked with steering ADNOC Gas’ ambitious growth strategy focused on business expansion, decarbonisation, and future-proofing operations.

How to successfully run a four-year acid plant campaign

Apart from having a good plant design, good maintenance practices and good operational discipline are key to optimise the performance of an acid plant and to protect it from corrosion and achieve a long life. B. Mumba, T. Mwanza and P. Ng’ambi of Kansanshi Mining PLC explore the Kansanshi sulphuric acid plant operations and the key parameters monitored and practices adopted that have helped to extend the catalyst campaigns from two years to four years.

Protectionism casts a shadow over the new year

The start of a new year is a traditional time to take stock of the previous 12 months and look ahead to the next. In this regard, CRU’s most recent annual client survey, conducted at the end of December last year, makes interesting reading as to your own concerns for 2025 and beyond. There were numerous responses across commodity and financial sectors, and broadly based worldwide, if slightly skewed towards Europe and North America, but across all of these the key worry for the coming year clearly emerged as trade tariffs and protectionism. This is perhaps unsurprising, given incoming US president Donald Trump’s avowed intent to impose blanket 20% tariffs on all goods entering the US, and up to 60% on China. While most clients did not think tariffs would rise as much as some of Trump’s rhetoric might suggest, most expect rises of 5-10% across the board, and Asian businesses are most concerned. CRU’s most recent position paper on US tariffs highlights some of the internal political and legal challenges in implementing these, but does acknowledge that some rises will be inevitable, and may well produce the kind of reciprocal measures last seen in the previous Trump administration’s trade war with China and the EU in 2018.

Sulphur Industry News Roundup

Sulphur and sulphuric acid marketer Aglobis has signed a memorandum of understanding with logistics services company Rhenus to develop a sulphur remelter plant at Rhenus’s Terminal 4 in the river Rhine port of Duisburg, operated by Rhenus Port Logistics Rhein-Ruhr. Aglobis says that the development is a result of changing sulphur supply in Europe. Declining production from refineries and sour gas is leading to less liquid sulphur availability and greater imports of solid sulphur from overseas.

Price Trends

Global sulphur prices were mostly assessed flat in mid-January, with only slight changes for China, Indonesia and India, while the first quarter contracts for the Middle East, North Africa and Tampa increased from the previous quarter. Overall, the number of transactions taking place globally has declined as subdued demand has limited trading activity in most delivered markets. The current sulphur price environment has been shaped by the combination of rising Chinese demand and higher Middle East f.o.b. prices in the second half of last year. As a result, some consumer markets such as Indonesia and India have been subject to upward pressure in order to remain attractive destinations. But demand remained lacklustre across delivered markets, leaving prices relatively stable.

Decarbonisation in the sulphuric acid industry

New concepts focused on the transfer and combination of existing sulphur and sulphuric acid technologies to support decarbonisation of the sulphuric acid industry are being investigated. In this article three research projects are discussed: sulphur dioxide depolarised electrolysis for green regeneration of spent acid, use of renewable heat and catalyst to the splitting process from sulphuric acid to SO2 for reduction of fossil fuel consumption, and sulphur as an energy vector.