RE: Michael Caine revisited10 Sep 2022 15:46
micktrick, if its full of CNG you won't be able to put any CO2 in it ;p
Seriously though I think there are several issues, safety, logisitcs, quality, infrastructure and cost.
CO2, depending on its use will be transported as either a liquid or solid.
CNG will obviously be transported as gas, if you look at the image of the truck on page 3 of the presentation you will see several large cylinders, how those cylinders are connected I am not sure, but I imagine that there will be a single point which will be used for both filling and distributing to the customer.
Delivery, will a single customer take part, all, or several trucks of CNG?
If it is the case that one customer will take several lorry loads at once and you think great lets fill those with the liquid CO2, you encounter other problems, there are, I believe, differences in the design of cylinders for containing liquid CO2 when compared with CNG cylinders.
So even if you could and wanted to do it you then have the following issues:
Safety, there are certain regulations (and rightly so) involved in the transportation of these products, one for instance is labelling, you should clearly see a CNG warning label in the aforementioned image, to then transport liquified CO2 would require swapping the lableling over.
You can of course get around this somewhat by transporting lots of smaller full cylinders being unloaded and loading the empties onto the truck, the problem then arises with where to put the full liquid CO2 cylinders.
So infrastructure and cost, you need to capture the CO2 in the first place, store it and wait for the truck to come along and collect it, the size of the businesses vary, therefore their CO2 ouptut varies, you could well end up with CO2 being vented to the atmosphere anyway before it is worthwhile there being sufficient volumes of CO2 to collect.
As Paul stated in the presentation those businesses are not very competitive, burdening them with the additional cost of this infrastructure is going to make their products even more expensive.
At the MOU site, if CO2 were to be delivered there, you would need the infrastructure to store the CO2 after unloading the CO2 at the MOU site the truck would then need to undergo a process to ensure that any CO2 left was removed, perhaps venting to atmosphere, not sure if this would be sufficient and what level CO2 remaining would be considered a contaminent.
This is of course if there is oil in the licence area that would benefit from the use of EOR.
Please note that the above is only a few thoughts, I have not dealt with liquid CO2 cylinders for over 20 years now so some of the above may be complete rubbish.