Novel Membrane Pervaporation Process Removes Sulfur from Gasoline
TranSep-G™ is a revolutionary pervaporation process that selectively separates the
aromatic molecules (containing most of the sulfur) from gasoline streams without also
removing the olefins, thereby allowing the high-sulfur product to be nonselectively
hydrotreated without significant loss in octane. What sets TranSep-G™ apart from
other pervaporation processes is the unique and patented use of a Venturi nozzle
and special working fluid with which to pull the vacuum required to recover permeate
from the downstream side of the membrane. The figure below shows the simplicity
of the overall process.
Technology: TranSep-G for
Gasoline Desulfurization
Permeate is recovered from the Venturi liquid at atmospheric pressure thus
eliminating expensive refrigeration systems generally required to condense
light hydrocarbons at high vacuum. This reduces both the capital and operating
costs substantially over conventional pervaporation systems that use vacuum
pumps (or steam ejectors) and refrigeration units.
Please contact us for more details.
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BENEFITS:
- Polymeric membrane selectively removes
sulfur species without removing olefins (less
octane loss)
- Ultrathin membrane construction provides high
throughput
- Operates at 80-100 °C
- Utilizes patented Venturi vacuum system (no
vacuum pump or steam ejectors)
- Works in tandem with existing nonselective
- hydrotreaters
ADDITIONAL APPLICATIONS:
With a simple change in the membrane and/or Venturi
fluid, TranSep can be used to:
- Remove mercaptans from natural gas
condensates
- Reduce benzene levels in finished gasoline
streams in order to meet more stringent
proposed benzene limits
- Dehydrate organic solvents such as
isopropanol and acetone
- Remove volatile organic compounds like MTBE
from groundwater or plant wastewater
- Dehydrate ethanol for biofuels
