Chevron Shipping, Wärtsilä Partner to Lower Methane Emissions on LNG Carriers
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Technology group Wärtsilä, in partnership with Chevron Shipping Company plans to convert one engine on six of Chevron Transport Corporation’s LNG Carriers from dual-fuel (DF) to spark gas (SG) operation.
The conversions are intended to reduce greenhouse gas emissions by lowering methane slip in support of Chevron Shipping’s broader efforts to reduce the carbon intensity of its operations. This marine industry first was made possible after two years of collaboration between the companies. The order for the first two vessels was booked by Wärtsilä in Q3 2024.
LNG, when burned as a fuel, results in small amounts of methane that may not fully combust leading to methane escaping into the atmosphere, referred to as methane slip. Methane exists in the atmosphere for a shorter time than CO₂ but traps approximately 25-30* times more heat over a 100-year period. Addressing methane emissions is a key part of lowering carbon intensity.
Wärtsilä’s 50DF to SG conversion project is designed to modify the engines in service to operate as SG, using spark ignition versus diesel pilot fuel to initiate combustion. This enables a more optimised combustion process, thereby reducing the methane slip and improving efficiency.
“Chevron Shipping aims to reduce methane emissions intensity of our LNG fleet in support of a lower carbon future,” said Barbara Pickering, president of Chevron Shipping.
“We are pleased to collaborate with Wärtsilä in this industry first. This demonstrates steps we are taking to help reduce the carbon intensity of marine transportation,” added Pickering.
“This innovative project represents a notable step forward on the road to advancing lower carbon fleets,” said Roger Holm, president of Wärtsilä Marine and executive vice president at Wärtsilä Corporation.
“Wärtsilä has an extensive track-record in reducing methane slip from LNG-fuelled engines, not only as newbuild solutions, but also through retrofitting existing installations,” added Holm.
This new technology complements Wärtsilä‘s extensive portfolio of solutions aimed at reducing methane emissions from vessels. With nearly three decades of experience in LNG technology, Wärtsilä is providing market leading performance both with the dual fuel flexibility provided by the DF engine, as well as with the single fuel SG engine.
Chevron is one of the world’s leading integrated energy companies. They believe affordable, reliable, and ever-cleaner energy is essential to enabling human progress. Chevron produces crude oil and natural gas; manufactures transportation fuels, lubricants, petrochemicals and additives; and develops technologies that enhance its business and the industry. They aim to grow their traditional oil and gas business, lower the carbon intensity of its operations, and grow new lower carbon businesses in renewable fuels, hydrogen, carbon capture, offsets, and other emerging technologies.
Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. They emphasize innovation in sustainable technology and services to help customers continuously improve environmental and economic performance. Their dedicated and passionate team of 17,800 professionals in more than 280 locations in 79 countries shape the decarbonization transformation of industries across the globe.
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