Carbon Capture and Conversion (CCC)
[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]
S. Korean researchers develop new catalytic pathway for direct conversion of CO2 to liquid hydrocarbon fuels
November 21, 2016
A team led by Professor Jae Sung Lee at Ulsan National Institute of Science and Technology (UNIST), with colleagues at Pohang University of Science and Technology (POSTECH), have developed a new pathway for the direct conversion of CO2 to liquid transportation fuels by reaction with renewable hydrogen produced by solar water splitting.
The new carbon capture and utilization (CCU) system is enabled by their discovery of a new catalyst that produces liquid hydrocarbon (C5+) selectivity of ∼65% and greatly suppresses CH4 formation to 2–3%. This selectivity is unprecedented for direct catalytic CO2 hydrogenation and is very similar to that of conventional CO-based Fischer-Tropsch (FT) synthesis, the team reports in a paper published in Applied Catalysis B: Environmental.
27 teams advancing in $20M NRG COSIA Carbon XPRIZE; converting CO2 to products
October 18, 2016
XPRIZE announced the 27 teams representing six countries advancing in the $20-million NRG COSIA Carbon XPRIZE, a global competition to develop technologies that convert the most carbon dioxide emissions from natural gas and power plant facilities into products with the highest net value. The semi-finalist teams propose converting CO2 into products as varied as enhanced concrete, fuels, toothpaste, nanotubes, fish food and fertilizer.
Launched in September 2015, the 4.5-year competition includes the demonstrations by finalist technologies at either a coal or a natural gas power plant. Six of the teams are competing in both the coal and natural gas competition tracks. About half of the 27 teams are producing fuels of one sort or another, with several more producing liquid chemicals that could serve as intermediates to fuel production. Those teams producing fuels or potential intermediates include:
DOE awarding up to $80M for supercritical CO2 pilot plant
The US Department of Energy (DOE) is awarding up to $80 million for a six-year project to design, build, and operate a 10-MWe (megawatts electrical) supercritical carbon dioxide (sCO2) pilot plant test facility in San Antonio, TX. The project will be managed by a team led by the Gas Technology Institute (GTI), Southwest Research Institute (SwRI), and General Electric Global Research (GE-GR).
The new facility will support the future commercialization of sCO2 Brayton cycle energy conversion systems by testing and demonstrating the potential energy efficiency and cost benefits of this technology. Today the average efficiency of the US fleet of steam Rankine cycle power plants is in the lower 30% range. This new facility has the potential to demonstrate greater than 50% cycle efficiency. If successfully developed, the supercritical CO2 power cycles could provide significant efficiency gains in geothermal, coal, nuclear, and solar thermal power production.
ORNL team devises electrocatalyst for direct conversion of CO2 into ethanol with high selectivity; pushing the combustion reaction in reverse
October 13, 2016
Researchers at the Department of Energy’s Oak Ridge National Laboratory (ORNL) have developed an electrocatalyst which operates at room temperature and in water for the electroreduction of dissolved CO2 with high selectivity for ethanol. Their finding was serendipitous. An open-access paper on their work appears in the journal ChemistrySelect.
The team used a catalyst made of carbon, copper and nitrogen and applied voltage to trigger a chemical reaction that essentially reverses the combustion process. With the help of the nanotechnology-based catalyst which contains multiple reaction sites, the solution of carbon dioxide dissolved in water turned into ethanol with a yield of 63%. Typically, this type of electrochemical reaction results in a mix of several different products in small amounts.
DOE to award up to $6.7M to projects to convert captured CO2 to useful products, including fuels
August 26, 2016
The US Department of Energy (DOE) will award approximately $6.7 million in federal funding for cost-shared projects that will develop technologies that utilize CO2 from coal-fired power plants to produce useful products. DOE’s Office of Fossil Energy is seeking these projects as part of the Department’s Carbon Storage program, which has the goal of developing and advancing technologies to improve the effectiveness of carbon storage, reduce the cost of implementation, and be ready for widespread commercial deployment in the 2025–2035 timeframe.
After carbon dioxide is captured from large point sources, such as coal-fired power plants, it can be injected into underground geological formations from which it cannot escape (geologic sequestration). Another option is to use the CO2 as a reagent to create useful products, such as cement, plastics, or liquid fuels. The new DOE funding opportunity announcement (DE-FOA-0001622) focuses on the second of these pathways which is focused on securing applications for projects that will develop CO2-utilization technologies that produce useful products at lower cost than currently available technologies, without generating additional greenhouse gas emissions.
UI, Argonne develop catalyst for more efficient solar-powered reduction of CO2 to CO for conversion to fuel
August 01, 2016
In a new study from the US Department of Energy’s Argonne National Laboratory and the University of Illinois at Chicago, researchers report devising a new transition metal dichalcogenide (TMDC) nanoarchitecture for catalytic electrochemical reduction of CO2 to carbon monoxide (CO) in an ionic liquid.
In their paper published in the journal Science, the researchers found that tungsten diselenide nanoflakes show a current density of 18.95 milliamperes per square centimeter, CO faradaic efficiency of 24%, and CO formation turnover frequency of 0.28 per second at a low overpotential of 54 millivolts. They also applied this catalyst in a light-harvesting artificial leaf platform that concurrently oxidized water in the absence of any external potential.
U of I study: synthetic fuels via CO2 conversion and FT not currently economically & environmentally competitive
July 03, 2016
A study by a team at University of Illinois at Urbana−Champaign has found that, with currently achievable performance levels, synthetic fuels produced via the electrochemical reduction of CO2 and the Fischer-Tropsch (FT) process system are not economically and environmentally competitive with using petroleum-based fuel. A paper detailing the study is published in the ACS journal Energy & Fuels.
In their paper, the team investigated an integrated system that converts CO2 released from fossil fuel-burning power plants to synthetic diesel fuel via a combination of the electrochemical reduction of CO2 to CO and the FT process, which uses CO and H2 from electrolysis) as feedstocks.
Ford first automaker to use captured CO2 to develop foam and plastic for vehicles
May 16, 2016
Ford Motor Company is the first automaker to formulate and test new foam and plastic components using carbon dioxide as feedstock. Researchers expect to see the new biomaterials in Ford production vehicles within five years.
Formulated with up to 50% CO2-based polyols, the foam is showing promise as it meets rigorous automotive test standards. It could be employed in seating and underhood applications, potentially reducing petroleum use by more than 600 million pounds annually. CO2-derived foam will further reduce the use of fossil fuels in Ford vehicles and increase the presence of sustainable foam in the automaker’s global lineup.
New $30M ARPA-E program to produce renewable liquid fuels from renewable energy, air and water
April 26, 2016
The US Department of Energy’s Advanced Research Projects Agency-Energy (ARPA-E) announced up to $30 million in funding for a new program for technologies that use renewable energy to convert air and water into cost-competitive liquid fuels. (DE-FOA-0001562)
ARPA-E’s Renewable Energy to Fuels through Utilization of Energy-dense Liquids (REFUEL) program seeks to develop technologies that use renewable energy to convert air and water into Carbon Neutral Liquid Fuels (CNLF). The program is focused in two areas: (1) the synthesis of CNLFs using intermittent renewable energy sources and water and air (N2 and CO2) as the only chemical input streams; and (2) the conversion of CNLFs delivered to the end point to another form of energy (e.g. hydrogen or electricity).
Stanford team devises new bio-inspired strategy for using CO2 to produce multi-carbon compounds such as plastics and fuels
March 10, 2016
Researchers at Stanford University have devised a new strategy for using CO2 in the synthesis of multi-carbon compounds. They first have applied their technology to the production of a plastic—a promising alternative to polyethylene terephthalate (PET) called polyethylene furandicarboxylate (PEF)—but are now working to apply the new chemistry to the production of renewable fuels and other compounds from hydrogen and CO2.
Matthew Kanan, an assistant professor of chemistry at Stanford, and his Stanford colleagues described the process and their results in synthesizing PEF in a paper in the journal Nature.
Researchers convert atmospheric CO2 to carbon nanofibers and nanotubes for use as anodes in Li-ion and Na-ion batteries
March 03, 2016
Researchers from George Washington University and Vanderbilt University have demonstrated the conversion of atmospheric CO2 into carbon nanofibers (CNFs) and carbon nanotubes (CNTs) for use as high-performance anodes in both lithium-ion and sodium-ion batteries. As described in an open-access paper in the journal ACS Central Science, optimized storage capacities were more than 370 mAh g-1 (lithium) and 130 mAh g-1 (sodium) with no capacity fade under durability tests up to 200 and 600 cycles, respectively.
The conversion process builds upon the solar thermal electro-chemical process (STEP) introduced by GWU Professor Stuart Licht and his colleagues in 2009. (Earlier post.) STEP is an efficient solar chemical process, based on a synergy of solar thermal and endothermic electrolyses, designed to convert greenhouse gas carbon dioxide into a useful carbon commodity. In short, STEP uses solar thermal energy to increase the system temperature to decrease electrolysis potentials.
UTA researchers demonstrate one-step solar process to convert CO2 and H2O directly into renewable liquid hydrocarbon fuels
February 23, 2016
Researchers at the University of Texas at Arlington have demonstrated a new solar process for the one-step, gas-phase conversion of CO2 and H2O to C5+ liquid hydrocarbons and O2 by operating the photocatalytic reaction at elevated temperatures and pressures.
The photothermocatalytic process for the synthesis of hydrocarbons—including liquid alkanes, aromatics, and oxygenates, with carbon numbers (Cn) up to C13—ran in a flow photoreactor operating at elevated temperatures (180–200 °C) and pressures (1–6 bar) using a 5% cobalt on TiO2 catalyst and under UV irradiation. A paper describing the process is published in Proceedings of the National Academy of Sciences (PNAS).
USC team develops highly efficient catalyst system for converting CO2 to methanol; 79% yield from CO2 captured from air
February 03, 2016
Researchers at Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, have developed a highly efficient homogeneous Ru-based catalyst system for the production of methanol (CH3OH) from CO2 and H2 in an ethereal solvent (initial turnover frequency = 70 h−1 at 145 °C).
In a paper published in the Journal of the American Chemical Society, they reported demonstrating for the first time that CO2 captured from air can be directly converted to CH3OH in 79% yield using the new homogeneous catalytic system.
Berkeley Lab team creates “cyborgian” hybrid artificial photosynthesis system; CO2 to acetic acid at high yield
January 05, 2016
Researchers at Berkeley Lab have induced the self-photosensitization of a nonphotosynthetic bacterium—Moorella thermoacetica—with cadmium sulfide nanoparticles (M. thermoacetica–CdS), enabling the photosynthesis of acetic acid from carbon dioxide.
Their hybrid approach combines the highly efficient light harvesting of inorganic semiconductors with the high specificity, low cost, and self-replication and -repair of biocatalysts. Biologically precipitated cadmium sulfide nanoparticles served as the light harvester to sustain cellular metabolism. This self-augmented biological system selectively produced acetic acid continuously over several days of light-dark cycles at relatively high quantum yields, demonstrating a self-replicating route toward solar-to-chemical CO2 reduction. A paper on their work is published in Science.
Global Bioenergies widens cooperation with Audi; new agreement to broaden feedstocks for bio-isobutene to isooctane process
January 04, 2016
Global Bioenergies and Audi have signed a new collaboration agreement (earlier post) to further broaden the feedstock flexibility of Global Bioenergies’ bio-isobutene process, which uses fermentation of sugars.
The two companies last year announced the delivery by Global Bioenergies to Audi of a first batch of bio-isobutene-derived iso-octane, a premium drop-in fuel for gasoline engines. (Earlier post.) Global Bioenergies had produced isobutene using its pilot plant located on the agri-business site of Pomacle, France. The isobutene was then shipped to Germany and converted into isooctane.
$3M UK project to develop low-carbon aviation fuels from captured CO2 and waste biomass
December 22, 2015
Heriot-Watt University in the UK will lead a £2-million (US$3-million) project (EP/N009924/1) to develop low-carbon aviation fuels from captured CO2 and waste biomass. The multi-disciplinary project, funded by the Engineering and Physical Sciences Research Council (EPSRC) will be led by Heriot-Watt engineers and scientists in conjunction with teams from Aston and Oxford Universities and the University of Edinburgh.
The project aims to produce low-carbon synthetic aviation jet fuel using renewable energy from waste agricultural and forestry biomass and captured CO2. The project team will use integrated chemistry (a bottom-up method to develop novel catalysts and electrodes) and engineering (a top-down method to tailor heat and mass transport parameters influencing reaction conditions) with a focus on high selective and efficient jet fuel production.
HeidelbergCement and Joule partnering to explore carbon-neutral fuel application in cement manufacturing
December 14, 2015
Joule, a pioneer in the production of liquid fuels from recycled CO2, and HeidelbergCement, a German multinational building material company, are partnering to explore application of Joule’s technology to mitigate carbon emissions in cement manufacturing. Cement manufacturing is highly energy and emissions intensive, currently contributing about 6% of global CO2 (Zhang et al. 2014).
As part of the agreement, emissions (or offtake gas) from various HeidelbergCement factories could provide Joule with the waste CO2 required to feed its advanced Helioculture platform that effectively recycles CO2 back into fuel.