How about the car that can use the infrastructure that already exists?
All this talk about new transportation fuels imho always sidesteps the fact that gasoline will never run out.
Petroleum will, but producing gasoline out of other sources is something that we already know how to do, and have done in industrial scale in the past. Fischer-Tropsch is cost-effective from coal at some point below $150 oil price. If you want to be carbon neutral, you just have to use a carbon feedstock that fills from the atmosphere, and a carbon neutral heat source.
A hydrogen economy is a complete hoax. If you want to make your fuel synthetically, hydrogen has practically no advantages over synthetic gasoline.
From what I understand, alternative gasolines tend to come from plants that we would otherwise be eating. I believe a more sustainable system would be one that doesn't use something we're already using for an area as vital as our food. Hydrogen, as an example, isn't something we ingest; and the output, so they claim, is water. Also, coal is probably the most bad-for-the-environment, dangerous and radioactive thing we as a human population work with on a regular basis; and I personally would rather we reduce our use of coal than encourage it as a fuel source.
Part of making fuel using the Fischer-Tropsch process is actually to turn the coal into CO, which is then used further on in the process. This step is extremely good for removing impurities. All the radioactive stuff is going to be in the ash.
However, using coal means that you are not carbon neutral. It's a lot better to use some process of sequestering CO2 from the atmosphere -- either through plants, or directly. The plant solutions differ from plant oil or ethanol-based fuel production in that the plants are not expected to add any energy to the mix. This makes the process a lot more lenient on what you can stuff in, and makes the drain on agriculture a lot less severe. Also, since the nutrients in the plants are going to be left behind at gasification, they can be reused as fertilizer.
Incomplete combustion is a much bigger problem for complex molecules like hydrocarbons. Even with catalytic converters, small-scale consumer engines throw out a lot of toxic crap besides pure CO2.
All this talk about new transportation fuels imho always sidesteps the fact that gasoline will never run out.
Petroleum will, but producing gasoline out of other sources is something that we already know how to do, and have done in industrial scale in the past. Fischer-Tropsch is cost-effective from coal at some point below $150 oil price. If you want to be carbon neutral, you just have to use a carbon feedstock that fills from the atmosphere, and a carbon neutral heat source.
A hydrogen economy is a complete hoax. If you want to make your fuel synthetically, hydrogen has practically no advantages over synthetic gasoline.