Praxair and Valero have successfully implemented
Praxairs new CONOx emissions control technology
at Valeros refinery in Ardmore, Oklahoma, the companies
said on Friday.
This technology has helped the refinery meet its fluid catalytic
cracking (FCC) unit nitrogen oxide reduction target without
requiring a shutdown for installation.
Praxair says its proprietary CONOx system is a
practical, low-capital cost technology for refiners searching
for a way to reduce emissions. It also allows refiners more
flexibility to modify the operation of the FCC unit as needed
while ensuring FCC limits are always being met.
After eight months of operation at the Ardmore facility, the
CONOx system continues to meet Valeros needs and
provide necessary NOx reduction, according to the company.
Praxair refining specialists have
collaborated with refiners for decades and have extensive
knowledge of FCC units, said Subodh Ganguly, director of
refinery and hydrogen applications
As one of the worlds leading industrial gas
companies, we have many successful oxygen enrichment
installations in refineries. Our experience enabled us to
implement FCC improvements with minimal downtime and an
ever-present focus on safety."
The CONOx lance installed in the FCC operated
reliably over a wide range of conditions and met the refinery's
NOx reduction requirements.
Praxair says the CONOx lance is a unique approach to
NOx reduction, allowing Praxair to offer Valero a solution
that did not involve reduced charge rate or more expensive feedstock. Timing was critical, and
the simplicity of the system allowed for faster installation to
meet Valeros requirements.
Valero and Praxair plan to continue to work together
to assess additional applications for CONOx technology and evaluate other
opportunities to improve the performance and reliability of refinery operations, said Mike
Jordan, vice president of Praxair's hydrogen business in