Magazine: Nitrogen+Syngas

The ammonium nitrate explosion in Beirut in August 2020 has once again focused minds upon the potential risks associated with the chemical.

Venkat Pattabathula, a member of the AIChE Ammonia Safety Committee, reports on the American Institute of Chemical Engineers’ Safety in Ammonia Plants and Related Facilities Symposium, held virtually on 30 August to 2 September 2021.

The fact that biuret is toxic to plants has been known for a long time – since the middle of the last century. Very sensitive (pineapple, citrus), moderately sensitive (cereals, legumes) and resistant (conifers) plant species were identified. The maximum concentration of biuret in urea for each species has been established for soil application and foliar application. Most field crops easily tolerate foliar fertilization with urea, which contains 1 wt-% biuret. Potatoes and tomatoes are more sensitive – for foliar feeding of these crops, it is advisable to use urea with an admixture of biuret of no more than 0.5 wt-%. Citrus fruits and pineapples are so sensitive that biuret in urea for foliar feeding should be no more than 0.35 wt-%.

The UK has published its Hydrogen Strategy, setting out the government’s ambition to create a low carbon hydrogen sector, with up to one third of the UK’s energy consumption being hydrogen-based by 2050. The commitments set out in the strategy unlocks £4 billion of government investment by 2030. The government plans 5GW of low carbon hydrogen production capacity and the establishment of carbon capture, use and storage (CCUS) in four industrial clusters by 2030, as well as blending of hydrogen into the existing gas network and a ‘twin-track’ approach to hydrogen production, using both electrolytic and CCUS-enabled low carbon hydrogen production in order to scale up production in time to meet the UK’s 2030 and 2050 carbon emissions targets.

The first half of 2021 has been characterised by tight supply in the ammonia market, exacerbated by plant outages in Europe, Trinidad, Saudi Arabia and Indonesia. At the same time, higher spot demand has fuelled significant price increases in both the eastern and western hemispheres. Low inventories and reduced export availability in the Far East forced Indian phosphate producers and industrial consumers of ammonia to source product from other locations.

Arun Murugan and Mike Antony of FITIRI and Venkat Pattabathula of SVP Chemical Plant Services discuss the COORS Analytics system for more accurate prediction of the performance of a CO 2 removal system.

Johnson Matthey’s latest methanol synthesis catalyst, KATALCO™ 51-102, was introduced in 2018 to offer improved catalyst stability and therefore higher end-of-life activity and extended lifetimes than conventional methanol synthesis catalysts. Since launch, KATALCO 51-102 has been successfully installed in two methanol plants and a third is planned for later in the year. In this article Johnson Matthey provides an update on the proven performance of KATALCO 51-102 during lab and pilot scale testing as well as in customer plants. The application of catalysts made using the KATALCO 51-102 technology for methanol synthesis via new ‘green’ routes, such as using captured and purified CO2 in conjunction with ‘green’ hydrogen, is also discussed.

Although the stranded gas boom that led to the construction of the region’s nitrogen capacity in the 1980s-2000s may be largely over, the Middle East remains the largest nitrogen exporting region in the world.

Johnson Matthey and MyRechemical have formed an alliance to commercially develop waste to methanol technology. In this article, two different approaches to waste disposal and chemical production are analysed: a post combustion scenario with waste incineration and hydrogenation of the CO2 recovered from flue gas to produce methanol, and a precombustion approach with waste gasification followed by conversion of synthesis gas into methanol.

By utilising state-of-the-art technologies, nitric acid and ammonium nitrate producers are able to reduce the environmental impact of their production plants and make a key contribution to climate protection.