Canada’s Nett Technologies has developed a selective catalytic reduction (SCR) system that allows existing tugs and commercial harbour craft to meet stricter US EPA Tier 4 emissions
Installed in partnership with Pacific Marine Group, the BlueMax Nova 320 SCR was retrofit on a 1,491-kW tug in San Diego through the Technology Advancement Program (TAP) sponsored by Ports of Long Beach and Los Angeles. TAP promotes the development of promising emissions-reduction technologies.
Starting as early as 1 January 2023, tugs and coastal commercial vessels will have to comply with more stringent Tier 4 emissions regulations from the US EPA and California Air Resource Board (ARB) Draft Proposed Amendments.
Engineered specifically for marine applications, the BlueMax Nova 320 is an SCR, an active diesel particulate filter and a diesel oxidation catalyst system designed to control emissions of particulate matter and NOx. The system provides 95% NOx and 95-99% PM reduction and, in addition, reduces CO and hydrocarbon emissions by more than 98% and 82%, according to the manufacturer.
The BlueMax Nova 320 is designed for high- and medium-speed engines, as well as low-duty-cycle vessels operating over short distances. The engineroom space constraints of tugs and harbour craft have also been taken into account in the system’s design.
“Our compact SCR system was designed with the confined engineroom in mind,” said Nett Technologies product manager Misagh Tabrizi.
Nett Technologies said the BlueMax Nova 320 has been adapted from a well-proven and verified California ARB system that demonstrated excellent success in hundreds of installations on stationary diesel engines.
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