Ragged, I picked this thread up and laughed. Just be careful with your excitement.
I will give a quick view on GTL, in particualr the Shell Middle Distillate Process (SMDS).
The SMDS has a thermal effeciency of 63% (their literature: Handbook of Petroleum Refining Processes- Robert Myers)
There 1 metric ton of natural gas would produce a product of equivalent themal content of 630kg.
(1 mt NG is equivalent to around 50000 scf or 50 million BTU)
In the case of methane the heating value is about 50 GJ per tonne. The equivalent diesel product would contain the same energy adjusted for the diffrence in energy density.
Mass of diesel = 630kg x 50(methane GJ/t)/ 44 (FT diesel GJ/t) = 715 kg FT diesel. ~872 ltrs (230 US galls)
It is absolutely simple if you stick with SI units.
Oxidative coupling of methane is nothing new. It has been around for decades and a lot of money has been sunk into it with not much success. The biggest challenge is stopping the methane reacting with the oxygen to form carbon dioxide. The real drawback is controlling the reaction selectivty at high temperature. The reaction is an equilibrium reaction that has to take place at high temperature. Siluria claim, and that what it is , a claim, that by growing the catalyst on a virus they can somehow improve the selectivity. Let us say that within my company we are somewhat pessimistic about such claims. The patents that they have published tend not to support any significant improvement over the work of others.
We doubt if they could achieve an economic cost process that would firstly beat current ethane steam cracking technology. Cracking ethane is highly developed.
Coupling methane is not easy, and converting this into hydrocarbon fuels will be far more challenging than expected. So far all of the GTL process have turned out to be seriously capital intensive and there are few actual plants in the world. Less than 10 and most are Bonsai. Shell abandoned their GTL plant for the US citing that it was uneconomic. No surprise there. If the process were any good there would be many more plants.
Looking at the potential for fuel production from this process does not fill me with much hope. It illustrates the lack of commerical knowledge of the developers. Why would anyone want to devalue a product, which is effectively what would happen if, they managed to produce ethylene in commerical quantities at a cost lower than at present. Ethylene is a primary building block that carries a premium over bulk fuels. Turn it into gasoline or diesel and you would have some very angry investors.
To me this reads like another of the many not so bright ideas that come across my desk every week. Gullible investors are snared by the promise of some pixie dust solving the worlds energy crisis. Two years ago we had Solaslime and Kior. Kior is all but bust and Solaslime plods on making high value but small volume fatty acids. A long way from the promise of cheap fuels, and even further from making a profit, and meanwhile burning through their cash pile at an alarming rate.
Rockman nailed it when he said some people make a lot of money from research projects. As for Brakem do not be fooled. They are just a big stupid mullet who wandered into the chum circle. Not the first time they have bought into a real can of worms. It never ceases to amaze me how many large companies get suckered, ignoring the laws of thermodynamics, burning their investors money.
Who am I. I work for a large multinational chemical company and evaluate chemical processes. My main interest is is refinery tecnhologies, especially catalytic cracking, steam cracking for olefines, Fischer Tropsch processes and alternate routes to fuels (still looking). We have extensively looked into MTO, MTP and MTG and made one conclusion. Money pit. Better back the horses if you want a winner.
Here is a link to OCM
http://www.us-egyptasi.com/Presentations/Nasrallah.pdf I hope that you can follow it or at least get the gist of the content.