The carbohydrate in grasses seems to be (C(H2O))7H. All the fossil fuels in the world were made by bubbling geothermal water through plant and animal carbohydrates. These go up to ((CH2O))18H. So (C(H2O))nH.
When we pass high pressure steam over carbohydrates, we break the hydrogen bond, and the carbohydrates breaks down into hydrocarbon.
This is an explosive gas. So only copper tubing. We use the surplus O and H to produce a hot flame. That drives a small turbine. That powers a pump to recirculate the steam.
We also drive a Carnot system, that produces hydrocarbon, plus excess oxygen, with a little H. We use a semi permeable membrane to separate the H, and use a little O, to produce a mad hot flame.
The rest of the O has high commercial use – and engineering applications. So the steam has cracked the carbohydrates into hydrocarbons – just like the deep earth did.
If we want a higher C number of the fuel (diesel is 12, petrol 16) we pass the light fuel oil over honeycomb Ti catalysts – so we can make petrol – from grass butting – we burn today.
A simple one to do, is use the wheat stem, after we have separated the wheat kernels. Instead of burning them, we pass high pressure steam through them. We get off 'sweetened' fuel oil.
The sugars are long chain hydrocarbons, so will produce heavier hydrocarbons. The sugar is broken apart by the steam.
So we can produce diesel oil from farm waste. All the brass we burn today, we turn into bio-fuels. Which only release the CO2 the plants have taken in during the growing year. So bio-fuels count as carbon 0.
So we use our waste to produce diesel and petrol – and save the planet. So no more Fossil Fuels burning. We grow our own petrol every year.
Just think the UK wastes 15 million tonnes of grass a year. A little steam injector, and a family can make their own petrol. City Parks can be major petrol suppliers.