737 wing span 35m. Surface area therefore about 300m2. Approx 10k planes flying. Maybe Same number grounded. Total area 6m m2 = 6 sq km = 15x the mall of America.
This doesn't merit further discussion. Andrew Lockley On Mon, 15 Apr 2019, 14:49 David Sevier, <[email protected]> wrote: > Planes are flying anyway. Titanium dioxide coating can be fractions of a > micron thick and therefore won’t add appreciable weigh. They fly in air > that is cold and which has greater amounts of UV than on the ground. The > cold conditions may favour desired reactions. They also fly quite fast, so > the rate of interaction with gas molecules is high. Whether this makes a > difference or not will depend on the reaction kinetics. > > > > You have jumped to conclusions on this. I don’t know if there is something > here or not. Hence my questions. > > > > Regarding roads and buildings: careful paint design is needed to maximize > gas to surface interaction. I am not convinced this would work for roads > due to wear and recent classifications of titanium dioxide as a cancer risk > when a dust. This is something that anyone thinking of using titanium > dioxide for SRM should bear in mind. > > > > *From:* Andrew Lockley [mailto:[email protected]] > *Sent:* 15 April 2019 14:27 > *To:* David Sevier > *Cc:* geoengineering > *Subject:* Re: [geo] titanium dioxide > > > > Planes have a tiny surface area, big weight penalty and the air is very > thin. Doesn't pass a sniff test. > > > > Using it in building and roadway surfaces is much more likely to work > > > > Andrew > > > > On Mon, 15 Apr 2019, 14:06 David Sevier, <[email protected]> > wrote: > > I am wondering about whether titanium dioxide when electroplated as a film > can be used to decompose methane under ultraviolet light conditions. Can > anyone advice on this? I am seeking to compare this against polycrystalline > titanium dioxide which is known for this. I am also interested to > understand if titanium dioxide can be used to decompose nitrogen oxide and > in particular nitrous oxide under UV light conditions. Again, also to > understand if electroplated films can do this. > > > > A possible application would be to coat planes with titanium oxides. There > might be some useful decomposition effects as they fly through the high > atmosphere under cold bright conditions. > > > > Just to head off any misunderstandings, I am not saying in any way that > this will fully mitigate the effect of the emissions that flying creates > but it might just have a useful *small *effect to reduce them. Hence the > questions. > > > > > > David Sevier > > Carbon Cycle Limited > > 248 Sutton Common Road > > Sutton, Surrey SM3 9PW > > England > > Tel 44 (0)208 288 0199 > > www.carbon-cycle.co.uk > > > > *PLEASE NOTE OUR NEW TELEPHONE NUMBER* > > > > This email is private and confidential > > > > > > [image: Rushlight_commended_Logo_white_2018_19_RGB] > > > > > > > > > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/geoengineering. > For more options, visit https://groups.google.com/d/optout. > > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
