RLG production forecasts fraught with uncertainty

Government backing and co-operation between competitors are needed to align with the targets for RLG output, writes Matt Scotland

The production of renewable LPG and dimethyl ether (DME) is projected to rise to 60mn-120mn t/yr by 2050 under a supportive policy scenario, consultants told attendees of this year's LPG Week conference in Cape Town, South Africa, over 18-22 November. But such forecasts continue to be laced with uncertainty given the enormous challenges involved in reaching commercial-scale output.

Output of both fuels, often pooled together under the umbrella term renewable liquid gas (RLG), could grow to 4mn-9mn t/yr by 2030 and 8mn-27mn t/yr by 2040 under the same scenario, according to the findings from a soon-to-be-released report from consultancies NNFCC and Frazer-Nash. But under a situation where no policy support is forthcoming, volumes are about a quarter of these projections, NNFCC managing director Adrian Higson told the audience.

RLG production could then exceed 100mn t/yr by 2050-55 and 200mn t/yr by 2060-65, Frazer-Nash consultant Jeremy Revell said, adding the caveat that greater uncertainty exists over a long timeframe. Biogas to LPG "offers the best potential route to renewable LPG beyond 2050", while gasification to DME does likewise for rDME. "One of the main surprises was just how much liquid gas we could produce by 2050, especially the role rDME could play from the gasification pathway," Revell said. "It has high potential yields and a lot of feedstock to support it."

Speakers at the event were keen to emphasise the high level of uncertainty involved in RLG development, and just how much rests on the degree of government backing when it comes to projecting growth. And even assuming a supportive policy scenario does not necessarily equate to clear-cut support for RLG, bearing in mind it will be competing with other technologies, BioLPG LLC chairman Kimball Chen told delegates. "I don't know yet what supportive policies we want and for which solutions," he said.

More co-operation between competitors in the LPG industry is needed to ease uncertainty, while allowing for competition between individual firms or partnerships, Chen said. "SHV and DCC [through their recently announced RLG collaboration] and my consortium [bioLPG LLC] with 12 European and American companies share the same technical challenges and will be competing for the same feedstocks, so the way we think about competition and increasing our chances for success as an industry and individually need to be further delineated," he said.

Cost calculation

Feedstock availability in many of the study's pathways is not a concern, with the possible exception of bioLPG from hydrotreated vegetable oil and hydroprocessed esters and fatty acids, something not unexpected, DCC's director of sustainable gas, Emmanuel Mannooretonil, said. The issue is having feedstock at the right price. "Now we see that technically it's possible and the feedstock exists, the next question is can we make a product good enough from an environmental and affordability standpoint for policy makers to support?" he said. The maturity of the technology is a challenge for the LPG industry, with "decisions of large financial magnitudes" required to get there, Chen added. "We have a race against time."

Cost will remain a problem over the medium and long term because of the technological limits, Chen said. But perhaps the biggest challenge is the reluctance to build a first-of-a-kind plant, SHV Energy's head of sustainable fuels policy, Goher Ur Rehman Mir, said. SHV is testing a number of production routes for RLG, including converting ethanol to butane. But pilot plants and then demonstration facilities are required first, necessitating more investment and collaboration, he said. "We need to join forces, which is why we have signed [an initial agreement] with DCC Energy," he said. "But we are open to collaborating with other stakeholders to develop a consortium to progress this process fraught with difficulties."

Renewable LPG, DME output forecast averages*