List and cc'ing the principal authors
Probably not “Geo” from the definitions I use, but I believe that if
their chemical engineering was coupled with a biochar operation, there could be
lower costs and it would then certainly be a form of CDR. Lower cost because
the needed CO2 could come into their reactor at 100,000 ppm and the right
temperature from what is presently a waste stream (containing half of the input
carbon). Available today in many biochar production locations at kW to MW
scales. Somewhat the same story for BECCS, but fewer and larger.
Presumably best to generate the needed H2 via PV/wind electrolysis, but
maybe there is a way to get the H2 upstream. H2 is a major (and desirable)
part of the pyrolysis gas stream in all biochar operations prior to its
combustion. The other available hot gas is CO - which is probably already in
other means of generating methanol from biomass. Every biochar producer should
love to hear more.
I don’t have access to the paper, so perhaps these thoughts are already
there.
Ron
> On Jan 27, 2016, at 1:21 PM, Andrew Lockley <[email protected]> wrote:
>
> Poster's note : does CO2-to-fuel tech count as geoengineering? Not sure but
> it's fairly interesting. Good way of using some spare sunshine...
>
> http://pubs.acs.org/doi/abs/10.1021/jacs.5b12354
> <http://pubs.acs.org/doi/abs/10.1021/jacs.5b12354>
> Conversion of CO2 from Air into Methanol Using a Polyamine and a Homogeneous
> Ruthenium Catalyst
>
> Jotheeswari Kothandaraman, Alain Goeppert, Miklos Czaun, George A. Olah* and
> G. K. Surya Prakash**[email protected].*[email protected] <mailto:[email protected]>.
>
> Loker Hydrocarbon Research Institute and Department of Chemistry, University
> of Southern California, University Park, Los Angeles, California 90089-1661,
> United States
>
> Journal of the American Chemical SocietyVol. 138: Issue. 3: Pages. 778-781
>
> Publication Date (Web): December 29, 2015
>
> DOI: 10.1021/jacs.5b12354
>
> A highly efficient homogeneous catalyst system for the production of CH3OH
> from CO2 using pentaethylenehexamine and Ru-Macho-BH (1) at 125–165 °C in an
> ethereal solvent has been developed (initial turnover frequency = 70 h–1 at
> 145 °C). Ease of separation of CH3OH is demonstrated by simple distillation
> from the reaction mixture. The robustness of the catalytic system was shown
> by recycling the catalyst over five runs without significant loss of activity
> (turnover number > 2000). Various sources of CO2 can be used for this
> reaction including air, despite its low CO2 concentration (400 ppm). For the
> first time, we have demonstrated that CO2captured from air can be directly
> converted to CH3OH in 79% yield using a homogeneous catalytic system.
>
>
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