ship.energy

Alfa Laval set to begin marine biofuel testing

The first biofuel to be tested at the Alfa Laval Test & Training Centre in Aalborg, Denmark, will be one produced in India by MASH Energy, which is created through pyrolysis of waste biomass.

The Centre, which offers 2,800 cubic metres of testing space and is already equipped for oil and gas fuels, has now been prepared for testing with biofuels.

The Alfa Laval facility is a core component of the company’s own research and development and it is also a site for collaboration with industry partners and research institutes. Alfa Laval, biofuel producer MASH Energy and shipowner DFDS have entered into one such collaboration, funded in part by Shipping Lab, a Danish non-profit initiative focused on smart shipping.

‘Two 25 cbm tanks have been installed at the centre, one of which is stainless steel and dedicated for testing of biofuels and other new fuel types,’ said Lars Bo Andersen, Alfa Laval Test & Training Centre Manager. ‘

‘New fuel alternatives are constantly being introduced to the marine industry, but the knowledge about their behaviour in marine fuel systems is limited. We want to extend that knowledge through testing, beginning with biofuels.’

He continued: ‘Biofuels are produced from many different sources using a wide range of production methods. Consequently, the end product varies. Even though producers aim to fulfil the ISO 8217 standard, fuel users may experience undesirable fuel behaviours, such as corrosion of the fuel system.”

Andersen also highlighted that corrosion is not the only potential issue. ‘Fuel injection is steered by viscosity, which is in turn controlled by heating,’ he said.

‘The relationship between heat and viscosity is hard to predict for biofuels, so the existing curves for HFO and LSHFO don’t apply. For biofuels to be used safely and efficiently, we have to gain more knowledge about them in order to optimise their handling and combustion.’

The first biofuel tested at the centre will be produced in India by MASH Energy, which is created through pyrolysis of waste biomass. Alfa Laval notes that, sourced from waste in this way, the fuel would be a net positive, removing CO2 from the overall carbon equation.

During the testing process, the biofuel will initially be mixed with ‘normal’ oil and combusted using the Alfa Laval Aalborg dual-fuel boilers at the centre, which will allow both flame characteristics and emissions such as NOx and particulate matter (PM) to be examined.

Between the tank and the boilers, the biofuel will be treated with an Alfa Laval high-speed separator to remove any impurities.

‘Depending on the results, the next stage will be combusting the fuel in the centre’s four-stroke engine,’ said Andersen.

‘That will involve a complete fuel line, including an Alfa Laval Moatti fuel oil filter and a Fuel Conditioning Module in addition to the separator. If all goes smoothly at the Alfa Laval Test & Training Centre, the aim is that the biofuel can be bunkered on the DFDS Pearl Seaways for hot water production while in Danish ports, and perhaps eventually as a fuel for the auxiliary engines.’

Samples of the MASH Energy biofuel have already been received and tested at VeriFuel facility in Athens. In anticipation of the full-scale delivery in Aalborg, additional preparations are being made at the Alfa Laval Test & Training Centre, for example to enable real-time viscosity and emission measurements that will improve boiler combustion control.

Alfa Laval is also in discussion with other biofuel producers, as well as other research partners, including Aalborg University, where the focus is on fuels derived from hydrothermal liquefaction (HTL). HTL is a bioconversion technology that can turn any wet organic material into an energy-dense bio-crude.

‘There are many possibilities for producing tomorrow’s fuels, and testing will be needed to overcome the many different challenges in the end results,’ said Andersen.

‘Getting to 2050 successfully will require intense research into lots of different options, which demands partnerships across the industry. We’re proud to contribute with Alfa Laval’s experience and the capabilities of the Alfa Laval Test & Training Centre.’

Lesley Bankes-Hughes

Lesley Bankes-Hughes