University of Nottingham activities. Focus on capacity building. ASGARD facility for investigating CO 2 release. Is CH n -> C + n/2H 2 a feasible route for carbon sequestration and hydrogen production (catalytic cracking of hydrocarbons gases)?
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Artificial Soil Gassing And Response DetectionMike Steven, Jeremy Colls & Karon SmithUniversity of NottinghamSchools of Geography (MS) and Biosciences (JC&KS)
Co-funding from SRIF3 allowed the development of a “permanent” field experimental facility - ASGARD
The TSEC programme (UKCCSC) funded13 months effort to establish and test ASGARD and to run one field season.
We can control CO2 release rates and soil concentrations.
We can relate soil CO2 concentrations to fluxes into the atmosphere.
We can detect CO2 induced stress effects in plants at soil concentrations of a few percent by remote sensing techniques.
We can discriminate fossil and biogenic carbon by isotopic analysis.
Ongoing and future work
Responses of plant root systems and effects on competition
Stress sensitivities of different plant species determined by spectral responses
Soil and soil water chemistry
Effects of SO2 contamination in leaked CO2
CO2 pathways in soil
Ecosystem recovery after gassingASGARD: achievements and plans
Is CHn -> C + n/2H2 a feasible route for carbon sequestration and hydrogen production?Colin Snape, Miguel Castro Diaz and Jamie Blackman
Catalytic decomposition of methane over supported metal catalysts has been widely studied in recent years to produce hydrogen free of CO and CO2.
The highest amount of hydrogen per metal has been obtained with a Pd-Ni/CNF catalyst (ca. 16,000 molC/molPd+Ni) after 30 hours .
The challenge is to achieve these high conversions with lower cost catalysts (i.e. base metals).
An unsupported Ni-Cu (4:1 wt/wt) metal alloy catalyst has been studied for the catalytic decomposition of ethene at 650-700°C.
Pure C2H4 (60 ml min-1) was decomposed over 25-100 mg of catalyst precursor in a quartz tube reactor for 3-9 hours.
 Takenaka et al., Journal of Catalysis 220 (2003) 468-477.
A few seconds
A few nanoseconds