Forums before death by AOL, social media and spammers... "We can't have nice things"
|    sci.chem    |    Chemistry and related sciences    |    55,615 messages    |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
|    Message 54,991 of 55,615    |
|    Treon Verdery to All    |
|    Laser zapping ablation of aluminum parti    |
|    14 Aug 22 01:54:55    |
      From: treon3verdery@gmail.com               The same technology could be used to make catalyst and catalyst metal shapes       11-20 times smaller. Making them 11-20 times as active per mg or gram. At a       vehicle catalytic converter something like a screen door screen grown upward       100-1000-10k nanometers        tall could use the same amount of catalytic metal as a flat plating on       substrate but because of its height presents twice as much surface area to the       air/exhaust as a monolayer plating. 1/2 as much metal catalyst can be used,       halving the expense of a        vehicle catalytic converter. Lasers could drill holes in the high fin       structures, this increases gas movement and mixing between the high vertical       catalyst fins. Tall vented fin catalysts rather than flat coating catalysts       makes vehicles $11-449 cheaper        each.              Strained and shocked semiconductors have different electron quantum level       effects. That suggests strained and shocked catalysts like fuel producing       zeolites would produce different reaction yield ratios, and different       catalytic abilities and velocities,        some of which could be beneficial, efficient, and lucrative after screening a       library. Sheet laser/THz/microwave scanning, encapsulation and em compression,       extreme gigapascals of hydraulic pressure, volumetric raster scanned       Sonoluminescence, and        supercheap use of immersion of zeolites in a tank of water with a shaped       charge of cheap nitroexplosive sending a ultra high pressure wave through the       watertank are all possible zeolite bulk treatments. I have no idea what the       efficiency gains might be,        but if strain and shock cause 40-60% greater combined zeolite atom tubule       roughness, wrinkling, splintering, and cracks between tubes that stuff can       flow through, then catalytic effects could increase 40-60%. That would make       petrochemicals and plastics        even more affordable because the tons processed per 24 hours goes up 40-60%       for a fixed reactor cost. Energy efficiency goes up and warming process energy       per gallon of fuel or plastic/polymer product produced decreases 40-60%. Also,       more than one        different shock/strain treatment can be used to build up a supercatalyst. As       one possibility among many, picosecond lasers striking a metal foil produce       radiation particles, and lasers ablating FeNi invar alloy can remove .01       nanometers per pulse, that        is about 1 atom thickness per pulse. Lasers likely do not shine through       zeolites, but terahz radiation and microwaves do. Adapt the pulse chirp energy       compression of visible laser light that makes super fast femtosecond high       joule pulses to THz and        microwave emitters. Then shock zeolites and other opaque catalysts with them.       Something like a scanning slice of light can traverse and shock/strain/modify       the entire zeolite chunk.               I do not know if it would be cheap enough to make but a zeolite aerogel could       have 98-99 times more surface area, while conserving the zeolite       characteristic of having many minute interconnected hollow tubules. centrifuge       or colloid gradient the        diversely sized powders and nanopowders of zeolite fragment in aerogel blend       as it coalesces, then dip it in a color changing, or spectroscopy discernable       reaction chemicals you want to promote, then just that area of the technology       development zeolite        aerogel that is most catalytic stands out, from biggest color change or       strongest raster scanned spectroscopy product concentration. Then production       aerogel zeolites can be made pure (but a blend) from that size of zeolite       powder, at an optimal aerogel        percentage on purpose. Also laser hole drillers making 756 holes       simultaneously in less than some amount of time are published. Using grating       based microbeam arrays like that to drill fluid transport to the aerogel       surface is likely to muliply speed of        fluid flow through and catalysis many times. Images of petroleum zeolite       catalysts at alibaba look like extruded short noodles without a hole. Simply       extruding petroleum zeolite catalysts to have a macaroni hole could produce       lots more fluid flow. And,        lasers could be used to put a grid of perforations through the macaroni like       shape. Extrusion of synthetic zeolite catalysts suggests that zigzag perimeter       medallion or hollow tube asterisks are as easy to make as the nonhollow noodle       shape i saw on        alibaba. Optimistically its possible to triple the surface area per gram with       just better noodle extrusion. 8-11% faster preferred reaction product       production velocity could occur.                     [continued in next message]              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
(c) 1994, bbs@darkrealms.ca