While there is still a considerable push for use of biomass waste as a lower carbon feedstock for chemical production via gasification to syngas, biological processes such as fermentation are increasingly gaining traction as an alternative.
Carbon Recycling International (CRI), which operates a geothermally powered green methanol plant at Svartsengi, 40km southwest of Reykjavik, had to evacuate its site in late November when a 3km fissure opened in the earth a few kilometres away and lava began spilling across adjacent land. Satellite photos of the area taken on November 24 show a large field of molten and cooled lava to the north, west, and south of Svartsengi, though the plant itself remained undamaged. CRI’s Iceland facility runs on CO2 , water, and renewable electricity from the Svartsengi geothermal power station. CRI says the low-carbon energy source allows it to produce 4,000 t/a of methanol with a greenhouse gas footprint just 10–20% that of conventional methanol.
In spite of increasing environmental concerns over the use of coal as a feedstock, it continues to provide around one quarter of the world’s ammonia. But in a world that is decarbonising, is there still a future for coal-based capacity?
A look at the safety challenges that face developers of ammonia-powered shipping vessels before it can become used more widely as a low carbon fuel.
As refiners adapt to the transition to a lower carbon economy, different strategies are likely to impact upon sulphur output.
Ammonia has been recognised as an advantageous hydrogen and energy carrier. This article focuses on the use of ammonia as fuel in steam reformers and ammonia crackers in order to reduce or completely eliminate direct CO2 emissions. Ammonia combustion knowledge is especially important for ammonia crackers with respect to the recycling of unconverted ammonia. Air Liquide is constructing an industrial scale pilot plant in Antwerp, planned to be operational in 2024, that will be used to demonstrate ammonia cracking and combustion in a process furnace with a multiple burner configuration.
As environmental SO2 emission regulations become more stringent, tail gas treating options become limited. To potentially achieve lower opex and improved plot plan, utilising a biological desulphurisation process as an alternative to a conventional amine-based TGT unit is becoming of increased interest in the oil and gas industry. At the same time, demands for increased SRU capacity and reliability favour the use of medium and high-level oxygen enrichment.
Qatar construction services company UCC Holding has signed a memorandum of understanding with the Kazakh Ministry of Energy for a gas treatment plant at the Kashagan field with a capacity of 6 billion cubic meters as part of the Phase 2B expansion. The memorandum was signed by Minister of Energy Almassadam Satkaliyev and Mohamed Moutaz Al Khayyat, chairman of UCC Holding.
The closure of CF Industries’ ammonia plant at Billingham, Teesside (see Industry News, page 8) marks the end of a long era for UK fertilizer manufacture. The facility was the last operating ammonia plant in the country, following CF’s decision to permanently close its site at Ince in Cheshire in June last year. Going forward, Billingham will now rely on imported ammonia as a feedstock to run the nitric acid and 625,000 t/a ammonium nitrate plants on the site.
Gasification, particularly of waste and biomass, is seeing interest as sustainable sources of syngas. But there are both technical and commercial challenges to wider adoption.