|NxtGen Syngas Diesel Aftertreatment System. NxtGen components are in blue. Click to enlarge.|
Officials from the Government of Canada, EnCana Corporation and Sustainable Development Technology Canada (SDTC) are committing C$5.5 million (US$5.6 million) in financing to demonstrate a new syngas-based diesel emission reduction system from NxtGen Emission Controls.
When retrofitted onto existing trucks, NxtGen’s system is expected to reduce particulate emissions by 85% and NOx emissions by 65%. The syngas technology also has the potential to enable manufacturers to increase fuel economy by reducing fuel requirements for regeneration of diesel particulate filters, according to the company.
The NxtGen system uses a non-catalytic Syngas Generator to produce syngas—a mixture of hydrogen and carbon monoxide—from engine exhaust and diesel fuel. The syngas is then used to regenerate a lean NOx trap (LNT) by converting trapped NOx into nitrogen and water. Syngas also enables active diesel particulate filter (DPF) regeneration through combustion at lower temperatures than diesel fuel, resulting in lower fuel consumption.
A Control Unit contains proprietary algorithms, developed by NxtGen, for optimizing aftertreatment system regeneration.
The Syngas Generator is the core of the system, and uses partial oxidation reactions to convert the diesel fuel and engine exhaust into hydrogen and carbon monoxide. The generator is compact, with quick start-up and fast transient response.
The project supported by EnCana and SDTC involves field trials of NxtGen’s diesel emission reduction technology on medium and heavy duty trucks. The systems are being retrofitted onto 12 trucks in three fleets across Canada, including three heavy duty trucks owned by Mullen Trucking LP, one of EnCana’s key transportation providers in Alberta.
The NxtGen system is being developed during a two-year, C$12.4 million program. EnCana is contributing to the project through its Environmental Innovation Fund. The fund supports the development, demonstration and, ultimately, the commercialization of innovative, clean-energy technologies that relate to the energy sector.
Sustainable Development Technology Canada is contributing C$2.5 million to the project through its SD Tech Fund. The $550 million fund supports the development and demonstration of innovative technological solutions that address climate change, air quality, clean water and clean soil.
For original equipment manufacturers, NxtGen has also developed a compact syngas system for use with light duty diesel applications.
Erik Johannes, Xuantian Li and Paul Towgood. Performance of a Non-Catalytic Syngas Generator for LNT and DPF Regeneration (SAE 2007-01-1238)