Biomass has a large potential as a renewable source of energy. A lot of research is done on the gasification of wood, such as the biomass-to-Synthetic Natural Gas (SNG) reactor of ECN in the Netherlands.
Gasification of wood is an old process, used for instance in the second world war to fuel cars. The research is focused on large scale (up to 1000 MW) continous gasifications plants that convert the gas to methane with the same high specifications as natural gas. Compared with the existing simple (small) gasifications reactors this is a highly sophisticated chemical processing plant.
You have to aim at these sizes if you want to replace a sizable amount of our natural gas consumption with SNG . The amount of wood needed to feed these plants is massive, millions of tons of wood per year, chopped to small chips. You have to import this wood by ship, you cannot harvest these quantities in the Netherlands.
That raises two questions. One: transportation and chopping of wood requires energy and creates CO2 emissions (assuming diesel is burned), how is the balance? Two: why transport wood to the Netherlands, is it not cheaper/easier to generate the gas or the electricity in Finland, in the middle of the forest, and transport the endproduct to the Netherlands?
The answers are surprising.
You can generate approx. 275 cubic meters of SNG out of 1000 kg of chopped wood. Burning this amount of natural gas equals approx. 530 kg of CO2 emissions. Using wood as a source for SNG means you do not add to the amount in the atmosphere, provided you renew the forestation. Suppose you have to use 2 liters of diesel to chop up and transport the 1000 kg. Burning these 2 litres generates 5,3 kg CO2, a ratio of 1 %. Surprisingly low.
What if you transport the gas or the electricity? Well the losses (powering compressors for gas, transmission losses for electricity) during the transportation are higher than incurred by transporting the wood. For instance, you lose several % in long high voltage transmission lines. Over there you probably cannot reuse the waste heat, which you can do when generating gas/electricity in the Netherlands close to urban areas.
So yes, it does make sense, both economically and in terms of GHG emissions to import wood from far away to the Netherlands and create gas, heat and electricity over here.