Tag: RATE

Fertilizer International presents a global round-up of phosphate rock, phosphoric acid and finished phosphates projects.

Newly-developed froth flotation equipment and reagents are improving selectivity and the grade and recovery of phosphate concentrates.

NOx emissions from chemical processes such as steam methane reforming contribute to air pollution. The chemical industry is required to take steps to lower such emissions. Technology, developed for related industries, can be designed and optimised to reduce NOx emissions from steam methane reformers. Emission control experts can use a combination of modelling and experience to guide plant operators in recommending and designing optimum, sometimes tailor-made solutions. In this article different options are discussed including low NOx burners, selective catalytic reduction, selective non-catalytic reduction and high emissivity ceramic coatings.

Natural gas pricing remains the dominant component of ammonia production costs. The fall in global oil and gas prices due to the Covid outbreak and the continued growth in the LNG market is continuing to break the hold of oil indexation on gas pricing. Meanwhile, reform of gas markets continues, in places as diverse as Brazil, China and India.

Part 1 of a two part look at a potential sustainable future for the nitrogen industry, looking at sustainable nitrogen management and nutrient use efficiency.

The coronavirus outbreak necessitated a ‘virtual’ CRU Sulphur + Sulphuric Acid conference last year, held in November 2020.

Ron Olson of The Sulphur Institute considers sulphur’s important role in plant health.

Process and simulation models can be valuable tools when troubleshooting to solve operational issues in sulphur recovery units. Two examples are provided. In the first case study it is shown how a tuned model was useful in troubleshooting an SRU that was experiencing lower than expected recovery efficiency and apparent channelling in the first catalytic converter. In the second case study an SRU simulation tool is used to investigate sulphidic corrosion in a waste heat boiler.

Continuing rationalisation in China’s phosphate industry has been reducing demand for sulphur and sulphuric acid at the same time that the country is producing more of both.

Fires are known to occur in sulphur storage pits and tanks somewhat frequently due to the presence of both flammable material and air, so methods for preventing and extinguishing these fires are critical. D. J. Sachde, K. E. McIntush, C. M. Beitler, and D. L. Mamrosh of Trimeric Corporation review fire suppression methods used in the industry including snuffing/sealing steam, rapid sealing, water mist, and inert gas blanketing. Protective tank design features to reduce the likelihood of a sulphur fire are also reviewed. Benefits and limitations, design considerations, and recommended guidance for suppression and preventative measures are discussed.