Many years ago, when I was much younger and much thinner and much better looking -- and this book came out in a red binding-->
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I was one of the gofers and staffies and lackies on the original safety evaluation of bulk marine shipment of LNG. My job was to collect the published data on the "ultimate" properties of the materials used to fabricate that great big sphere.
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One of the holy grails that we were looking for was some kind of solid or liquid "solvent" or "alloy" for the liquid methane - much like the acetone used as a solvent for acetylene - or Rare Earth - Nickel and Titanium-Nickel alloys used in NiMH batteries and some modes of shipping hydrogen. I think it's an interesting challenge - a good application of polymer science and physical chemistry with some mechanistic models of "hydrogen bonding" etc. (without doing any lab work or math modelling - I would guess some kind of a porous, very weakly ionized ion exchange membrane would be the first thing to try).
We never did find the "alloy" or "solvent" - but I think it's an interesting project for some young entrepreneurial PhD candidate.
Meanwhile - I would stick with our recommendations of 30+ years ago -- close the air space and put a security net around the LNG tanker; and certainly very tight harbor traffic controls.
And if I lived in the North Bay - I wouldn't sell my house - but I would certainly want the Coast Guard and the Contra Costa County Sheriff's Marine Detachment to put a tight net around it (the LNG tanker - NOT my house) -- and control or close the port and air spece while the LNG tanker was moving in "MY" San Francisco Bay.