SGT
SGT is a single-stage, bubbling fluidized-bed gasification system for the production of low-to-medium heating value syngas from a wide array of feedstocks including coals, coal wastes, biomass and municipal solid waste (MSW) using oxygen, oxygen-enriched air, or air in the gasification reaction. It was developed over 35 years of research, testing, piloting and demonstration, and SES has taken the technology to a new commercialized level during the last decade.
THE REAL COST OF ENERGY
People most in need of clean and affordable energy and chemicals are often the ones with the most limited means. Affordable, sustainable and realizable solutions paired with education are needed to preserve our planet while generating energy needed to improve the quality of life for people in these regions.
It’s an economic reality. Outdated and high-polluting technologies using locally sourced coal have been used to bootstrap electricity generation in many parts of the world. It’s been a necessity for many industrializing countries to sacrifice both energy independence and environmental responsibility because options for clean technologies were not affordable or flexible enough.
Traditionally coals and other resources have been burned to make energy. SGT does not burn these resources. Instead SES’s proprietary technology chemically reacts the feedstocks in a high temperature and pressure closed environment, and the syngas generated can be processed into a variety of clean energy products.
Therefore, growth based on SGT can be achieved without hazy skies and polluted water.
SES Gasification Technology (SGT) is: Affordable. Proven. Sustainable. Clean.
SGT transforms virtually all global coal reserves into synthesis gas, or syngas, which is used to produce clean, gas-based energy and chemical products we use every day. SGT’s fuel flexibility includes the ability to convert the world’s growing piles of coal mining wastes and the lowest quality sub-bituminous and lignite (brown) coals, which comprise more than 50% of the global coal resources. That is worth repeating: greater than 50% of the world’s available coal, most of which is currently untapped, can be cleanly converted to high demand and high value energy and chemical products with SGT.
Renewable biomass and municipal solid waste are alternative feedstocks for SGT. Agricultural wastes and other wastes that are disposal concerns for communities can be cleanly and affordably converted into much needed energy on small and large scales.
Imagine: SES Gasification Technology can convert all solid feedstocks into clean energy. The result? A country’s local and abundant natural resources can be converted into clean energy for its citizens.
SES Gasification Technology - HOW IT WORKS
SES Gasification Technology (SGT) offers a flexible and economical way to convert the world’s most abundant and least expensive energy resources into products to improve our society and way of life, bringing industrialization to regions which are still in desperate need of electricity, clean water and plentiful food sources.
Feedstock such as coal, biomass and municipal solid waste (MSW) is prepared in such a way to allow it to flow easily. Preparation may include grinding, sorting, shredding, and/or some drying if necessary to get the feedstock to the required specifications for the gasifier feed system. The prepared feedstock is then pneumatically conveyed into the SGT gasifier vessel, a bubbling fluidized bed reactor. Within the fluidized bed, the feedstock reacts with steam and oxygen, and the temperature is moderated to maintain high carbon conversion and non-slagging conditions for the ash present in the feedstock. The SGT gasification process accomplishes four important functions: it decakes, devolatilizes and gasifies the feedstock, and if necessary, agglomerates and separates ash from the reacting coal, biomass or MSW material.
During operation, the feedstock and reactant gases, including steam and oxygen, are introduced into the gasifier and are used to fluidize the bed inside the gasifier. Ash is removed by gravity from the gasifier and is discharged into a system for depressurization and disposal. The gasifier maintains a low level of carbon in the bottom ash discharge stream and achieves overall carbon conversions that can exceed 99%. Cold gas efficiencies of over 80% and carbon conversion of up to 99% have been repeatedly demonstrated on a commercial scale in SGT operating plants. SGT is more fuel-flexible, utilizing low-rank and other high-ash coals, and offers higher efficiency than competing gasification technologies, due to the fluidized bed design and resulting long residence times of the reacting particles.
Fines carried over from the fluidized bed are separated from the syngas prior to heat recovery and syngas cleanup. The product syngas is essentially free of tars and oils due to the temperature and residence time of the gases in the fluidized bed, simplifying downstream heat recovery and gas cleaning operations.
The syngas is then further processed for use in many applications such as electricity, substitute natural gas (SNG), methanol, di-methyl ether, glycol, ammonia, reducing gas for direct reduced iron (DRI) for steel production, industrial gases, and transportation fuels such as gasoline and diesel. Other byproducts such as sulfur, carbon dioxide, steam and coarse ash are viable commercial products. SGT allows for carbon capture during syngas processing in the syngas cleanup systems downstream of the gasification processes.
The 10 largest coal producers and exporters in Indonesia:
