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VTT study concludes gasification-based pathways can deliver low-carbon fuels from biomass for about 1.90-2.65 US$/gallon

Vtt2
Summary of levelized production cost estimates of fuel (LCOF) for the examined plant designs. The horizontal red lines show the comparable price of gasoline (before tax, refining margin 0.3 $/gal, exchange rate: 1 € = 1.326 $) with crude oil prices 100 $/bbl and 150 $/bbl. Source: VTT.

A study by researchers at Finland’s VTT has concluded that it is possible to produce sustainable low-carbon fuels from lignocellulosic biomass for as estimated gasoline-equivalent production cost of 0.5–0.7 €/liter (app. 1.90-2.65 US$/gallon US), with first-law process efficiency in the range of 49.6–66.7%—depending on the end-product and process conditions. Should the thermal energy produced as a by-product be exploited for district heat or industrial steam, the overall efficiency from biomass to salable energy products could reach 74–80%.

In their study, Ilkka Hannula & Esa Kurkela evaluated 20 individual biomass-to-liquids BTL plant designs based on their technical and economic performance. The investigation was focused on gasification-based processes that enable the conversion of biomass to methanol, dimethyl ether, Fischer-Tropsch liquids or synthetic gasoline at a large (300 MWth of biomass) scale.

Ucg
VTT’s test-rig for the Ultra-Clean Gas process. Click to enlarge.

All the evaluated BTL plants incorporated the same front-end design based on a pressurized fluidized-bed steam/O2-blown gasification of biomass, followed by hot-filtration and catalytic reforming of hydrocarbons and tars. This Ultra-Clean Gas (UCG) process has been at the focus of VTT’s biomass gasification R&D since 2006. The UCG process was developed for the production of low-cost synthesis gas from biomass.

They calculated production cost estimates assuming nth plant economics and without public investment support, CO2 credits or tax assumptions. The costs ranged from 58–65 €/MWh for methanol; 58–66 €/MWh for DME; 64–75 €/MWh for Fischer-Tropsch liquids; and 68–78 €/MWh for synthetic gasoline.

Converted into gasoline-equivalent price per liter, the estimated production cost would be 0.5–0.7 €/liter. The price of renewable solutions would thus be on a level with the current pre-tax price of fossil transportation fuels, and cheaper than existing imported biofuels.

After long-term development work, the technical functionality of the production process was verified through extensive testing at VTT test rigs as well as industrial piloting in Finland and in the US. The technology is now ready for its first commercial-scale demonstration. However, the first wave of these ground-breaking production plants requires significant public venture capital investment, for which planning has consequently been initiated at both Finnish and EU level.

According to the research results, the best efficiency and lowest production costs were achieved in the production of biomethanol. The risks related to the commercialization of the synthesis technology were also estimated to be lower with the biomethanol production plant compared to the other options.

VTT Technical Research Centre of Finland is the largest multi-technology applied research organization in Northern Europe.

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Comments

HarveyD

Cheaper than imported fossil fuel...could be a good solution for EU, even if some feed stocks have to be imported from Africa?

SJC

Told ya :)

Treehugger

biomass is too low energy dense to be transported over long distance, it has to be processed near were it is grown

DaveD

Every month or two someone comes out with a study or "proof" that biomass can be made for less than petroleum based fuels.

If that is even remotely true, then shut up and do it and we'll all be happy to buy it. Until then, it's just more noise...blah blah blah, blah blah, blah blah blah.

Kit P

"transported over long distance"

Not as long as one might think. If you look at the energy it takes to move high moisture content biomass, the distance is 25 milles.

The next problem is the ash, aka toxic hazardous waste.

Then there is the O&M. Look at the cartoon and this process needs a team of techs to operate and maintain it.

So unless you have waste biomass of that you have to haul to the landfill with a high tipping fee of sufficient quantity and quality, you can not pay for it.

Every study uses clean dry biomass. It works fine for the professors at the Institute of BS.

Peter_XX

The maximum transport distance with good economy in Northern Europe for transportation of cellulosic biomass feedstock is no longer than 50 km (Africa is definitely out of range). This has been demonstrated for pulp and paper mills as well as for heat and power plants in Northern Europe. Thus, there is a sound base for a 300 MWth plant as studied by the researchers regarding biomass transport. The limits for transportation indicate that the plant cannot be of refinery scale. Liquefaction via small-scale gasifiers to an intermediate product (“biocrude”) and transport (e.g. train, boat, pipeline) to a large-scale gasifier would be an option to solve the problem of storage and transportation but there is an accompanying loss of efficiency in the first gasifier that cannot be fully compensated for in the large-scale plant.

Biomass ash is nutrients, not toxic waste, and should be returned to the environment. This is already done on large scale, so we do not have to learn again how to do that. Of course, you cannot grow your biomass on toxic land, if you want to recirculate the nutrients.

The study does not really attempt to prove that biomass would be cheaper than petroleum-based fuels. A price level of 0.5–0.7 €/liter (app. 1.90-2.65 US$/gallon US) is not cheaper than current petroleum-based fuels, so it is all about what you expect future crude oil prices to be. This is not sufficient for venture capitalists. However, at the cost level mentioned, these second generation biofuels might be competitive with current first generation biofuels (e.g. ethanol, biodiesel and biogas) produced in Europe. Perhaps the fuels will not be competitive enough compared with sugarcane ethanol from Brazil and heavily-subsidized corn ethanol in the USA but this could be handled via duty on biofuels imported to the EU.

The main problem in exploiting the results from the study is that the most economical options, methanol and DME are not preferred by either the oil or the automotive industries. You need not only one but both of these stakeholders to support the idea. On top of that, venture capitalists would prefer to have the blessing from both the mentioned stakeholders before even considering investments.

SJC

Small modular BTL units could be placed close to the source of biomass. Venture capital may not be the only source, look at the Low Carbon Fuel Standard in California and other states. Credits from refineries can help pay for the new bio plants.

Engineer-Poet

300 MW(th) of biomass @ 17 GJ/tonne is 58 tons per hour, about 1400 tons per day, half a million tons per year.  If the plant operates all year, it would require 250,000 acres of cornfields producing 2 tons excess stover per acre per year to produce its feedstock.  This is about 800 square miles, a square roughly 28 miles on a side.  This is manageable.

To operate year-round, the feedstock must also be harvested, dried and stored under cover.  This will be costly.  At some point it makes more sense to process to pyrolysis oil at harvest time and store that in tanks or bladders.

This does not sound competitive to me.

SJC

It becomes more competitive when OPEC decides not to sell any more oil to the U.S.

Roger Pham

I believe that gasification and subsequent FC is more expensive and less efficient than pyrolysis and hydrogenation all in one step to produce refinable liquid hydrocarbon. The liquid hydrocarbon can then be transported economically to a refinery, because it will have many folds energy density c/w raw biomass.

The scheme that I have in mind is to set up the pyrolysis plants 30 miles apart in agricultural areas, or one every 900-1000 square miles.

The Hydrogen can be produced by solar PV set up in the field for the sole purpose of producing H2 via electrolysis. As such, no need for inverter nor rectifier nor long-distance power lines needed, hence much lower cost for the solar PV electricity. No need for large H2 storage container, either, because the H2 will be consumed as it is produced in the pyrolysis and hydrogenation process. Raw biomass will be gathered and stored until seasons that solar energy is plentiful, then processed and turned into refinable liquid hydrocarbon.

The above process will double or triple the yield of hydrocarbon fuel per unit of biomass used, as compared to the gasification and FC of biomass, while being much cheaper and less energy heat loss due to lower temperature and a single step process. Small BTL FC plant is not efficient due to the high temp and complexity involved, while single step pyrolysis and hydrogenation can scale down much better that still retain high efficiency.

Roger Pham

Thus, the pyrolysis with hydrogenation above can utilize solar or wind energy very efficiently into hydrocarbon fuel that can be used without change in vehicle nor infrastructure, nor issues with H2 storage, compression, dispension infrastructure, nor transportation of H2. When wind electricity is used in combination with solar PV electricity, the hydrogenation process can be done year round, thus reduce the investment cost of plants (due to high duty cycle) and reduction in cost of storage of waste biomass. Bi-annual crops can be grown, corn for summer and wheat for winter, thus allowing higher yield.

The MidWest USA is a region of very high solar and wind resource as well as agriculture, thus, in combination with waste biomass available locally, can turn into a modern Saudi Arabia (SAudi America?) of CO2-neutral hydrocarbon exportation.

Roger Pham

I must hasten to add to above that MidWest wind electricity is cheap and plentiful, but power lines are expensive. This scheme above will eliminate the need for powerlines for remote wind turbines, thus will significantly decrease the cost of wind energy. No more stranded wind resource, nor surplus wind electricity when supply outpace demand.

SJC

Temperature is not a problem with small modular BTL units, much of the waste heat is used in other parts of the process.

Much of the cost of converting pyrolysis oil
to fuels is in the stabilization process. Those costs would have to be reduced first.

Roger Pham

@SJC,
Pyrolysis oil will be stabilized during the concurrent hydrogenation process and turned into hydrocarbons. All the corrosive acids and aldehydes are reduced into hydrocarbons (alkanes and alkenes).

SJC

The costs of this are not quantified. The costs ARE quantified in this article and paper. Numbers DO make a difference.

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