Producing sustainable e-fuels like ethanol and butanol requires the processing of biofeedstocks. Using microbes to chew their way through them is well known. Justin Rickard at NREL describes research there that has found a much more efficient way, using electron-bifurcating enzymes. Flavin-based bifurcating enzymes are biocatalysts that have evolved to perform efficient metabolic reactions in harsh environments with low nutrients. The researchers … [Read more...]
Renewable Carbon must replace fossil feedstocks for e-fuels, fertilisers + more. Will supply match demand?
The world needs a large supply of renewable carbon to replace fossil feedstocks for hard-to-abate sectors like aviation, shipping, chemicals, food and beverage. Arno van den Bos, Karan Kochhar, Luis Janeiro and Francisco Boshell at IRENA present the results of their study to estimate demand, and whether supply can match it through to 2050. The main sources of supply come from alcoholic fermentation, biogas, pulp & paper, and biomass. Each has … [Read more...]
XanoGrass: a perennial, marginal land, all-climate, Biofuel feedstock substitute for wood, food crops, fossils
Biofuel producers are always looking for low carbon intensity feedstocks. Corn stover (the waste from harvested corn) is typical, but harvesting is seasonal. Jeffrey Wolf at NREL explains how research has led to the development of XanoGrass. It is a perennial, so can be harvested all year round. It can be grown on marginal or even “unfarmable” lands, so existing food crops won’t be displaced. No special farming equipment is needed, so existing … [Read more...]
UCO (Used Cooking Oil) for biofuels: how much is fraudulently imported virgin vegetable oil?
UCO (Used Cooking Oil) is a feedstock for biofuels. In 2023, European countries consumed close to seven million tonnes of UCO for biofuels. This is four times the continent’s maximum potential for supplying it domestically, so the rest comes from imports, mostly from China, Malaysia and Indonesia. The vast majority is blended for biodiesel to use in cars and trucks. UCO accounted for one third of conventional biodiesel feedstocks and a quarter of … [Read more...]
When can Bioenergy be truly green? 5 key questions for every project
Is bioenergy green? It depends, says Jessica Allen at the University of Newcastle. She lays out five key questions that should be asked about every bioenergy project. What is its source? Native forest residues, dedicated fast-growing biomass species, agricultural residues and “waste” biomass: all have pros and cons that must first be carefully measured. How many emissions are embodied in the collection and transport of the biomass to the plant? … [Read more...]
Biomass: new “CELF” process can turn waste lignin into useable fuels, chemicals
A new process can turn the lignin portion of biomass into affordable fuels. Lignin provides rigidity to a plant cell wall, but that rigidity makes it suitable only for burning for generating heat. Wayne Hicks at NREL describes how the new “CELF” pre-treatment process deconstructs and fractionates the lignin and other parts of biomass to yield a diverse range of products: alcohols, esters, carboxylic acids, and hydrocarbons. It could enable the … [Read more...]
How can Biomass fulfil its potential in EU carbon markets?
In carbon markets such as the EU ETS participants must monitor and report their emissions and ultimately pay for them. Biomass occupies a unique place. It is well positioned to be a net-zero emissions energy source for hard-to-abate sectors. Coupled with effective on-site carbon capture technologies, it can be carbon negative. And there is a great diversity of project types involving forestry, biochar kilns, waste-to-energy, carbon capture and … [Read more...]
Biogas from dairy farms: what incentives can make it commercially viable?
Anaerobic digesters are used to turn cow manure into useable methane fuel. But the raw cost of that gas is ten times the market price. On the plus side, emissions are being avoided. So how do you create the incentives that are fair and make it commercially viable? In California, dairy biogas has risen from almost non-existence five years ago to delivering half of all natural gas used for transportation in the state. Aaron Smith at the Energy … [Read more...]
16 innovative firms driving Aviation’s transition to net-zero
The Sustainable Aviation Challenge has identified 16 innovative firms that can accelerate the development and adoption of sustainable aviation fuel and other propulsion solutions. Aviation accounts for 2% of global emissions and, so long as lightweight compact clean aviation fuels are unavailable, this number is likely to increase along with air travel projections. Gianluca Gygax at the World Economic Forum lists the 16 firms, who will now be … [Read more...]
Event summary: “Bioenergy after REDIII – sustainable, climate neutral fuels for industry, transport and negative emissions”
Sara Stefanini provides a written summary of our panel discussion held on Wednesday 4th October 2023. It’s a full summary of the 75 minute discussion, and begins conveniently with a summary of the highlights. Under the recently revised Renewable Energy Directive (REDIII) bioenergy can be counted towards the renewable energy targets – provided that it meets strict sustainability criteria. Bioenergy already accounts for 60% of the EU’s renewable … [Read more...]
Concawe Symposium tackles climate and pollution as RED commits fuel companies to 29% renewable content from 2030
With the adoption of REDIII last week we are set for a dramatic increase in the “renewable” element of liquid fuels. It means that in just 10 years, the renewable element will have tripled, rising from 10% in 2020 to 29% from 2030 onwards. In the EU, Concawe (a division of the European fuel manufacturing industry) develops scientific research and technical studies on the fuel industry’s products and operations, and their impact. Concawe is … [Read more...]
The final hurdle for 100% Sustainable Aviation Fuel? Turning Lignin biomass into the “aromatic” component
Making 100% sustainable aviation fuel seems a long way away. Aircraft need energy-dense power, as delivered by fossil fuels, and sustainable alternatives are being developed. But a big challenge is that 10% - 25% of the fuel must be “aromatic” which neither thickens nor freezes at cold altitudes. Also, aromatics get absorbed by the plastic seals, make them swell, and ensure those seals between various components in the aircraft’s fuel system are … [Read more...]
Turning Ethanol production’s CO2 by-product into E-Fuels using Wind power
With vast open spaces, Midwest states in the U.S. produce millions of gallons of ethanol from corn as well as thousands of kilowatt-hours of electricity from wind farms every year. Research led by NREL is working on using wind power to drive electrolysers that turn the ethanol’s CO2 by-product into e-fuels, explains Erik Ringle at NREL. A typical 50 million-gallon-per-year ethanol plant releases 14 tons of CO2, a natural by-product of … [Read more...]
What is the future of Woody Biomass in the EU energy mix?
Simon Göss provides an overview of the main issues surrounding the intense policy debate over the future of biomass in the EU. The current proposals of the EU parliament still allow certain woody biomass to be used for all kinds of energy purposes but limits the share that primary woody biomass can contribute towards renewable energy targets. Included in the proposals is a new definition of primary woody biomass, and a phase-out of financial … [Read more...]
Biofuel is approaching a feedstock crunch. How bad? And what must be done?
The IEA is warning that biodiesel, renewable diesel and biojet fuel producers are heading for a feedstock supply crunch over the next five years. Rising prices are the signal to seek out new supplies and solutions, which should – and are - driving the development of government programmes and industry innovation. Here, the IEA lays out their projections for 2022-2027, covering all the main feedstocks: sugars, maize, soy oil, rapeseed oil, palm … [Read more...]
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