Gas to Aromatics – GT‑G2A
GT-G2A℠, a new process offered by Sulzer GTC Technology, is a highly efficient method of converting methane by activation with a halogen, namely bromine, instead of oxygen or sulfur as a co-reactant. Bromination chemistry is used to produce petrochemical-grade BTX, which has higher value than the paraffinic or gasoline fuel products of other recently-introduced processes that convert gas to liquids. All of the bromine is fully-recycled in a novel process scheme, to give the lowest CAPEX and OPEX of any competing process. The carbon utilization is the highest among any class of methane conversion processes.
Most technologies that convert natural gas into liquids are based on synthesis gas, which converts carbon monoxide into methanol or paraffinic liquids using Fischer-Tropsch technology. Such processes are only economical at a very large scale or in unusual circumstances, as they require unreasonably high capital costs. Additionally, some carbon is lost to CO2 during the syngas process step. The bromination and aromatic synthesis technology used with GT-G2A℠ uses a lower-cost, more compact process scheme, and produces higher-value products.
GT-G2A℠ is proven in a large scale demonstration plant, converting pipeline gas into BTX. There are excellent economics at capacity as low as 10 MM SCF/day gas flow, and with natural gas priced as high as $6.00/MMBTU. The technology platform is adaptable to efficient synthesis of other chemicals as well.
- Provides highest carbon efficiency of any methane conversion process
- Profitable for both small scale and large scale projects
- Produces high-value aromatics product
- Adaptable to produce other valuable petrochemicals
- Lowest CAPEX and high IRR
- Readily scalable (vapor-phase reactors)
GT-BTX® is an aromatics recovery technology that uses extractive distillation to remove benzene, toluene and xylene (BTX) from refinery, petrochemical or coke oven aromatics streams such as catalytic reformate, pyrolysis gasoline or coke oven light oil (COLO). With lower capital and operating costs, simplicity of operation, a wider range of feedstock and solvent performance, extractive distillation is superior to conventional liquid-liquid extraction processes. Flexibility of design allows use for grassroots aromatics recovery units, debottlenecking, or expansion of conventional extraction systems.
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