Bioenergy Lecture 1 as well as overview of course from vid/lecture Flashcards
What % of GHG in Ireland come from the agricultural sector
36%
How are Ireland connecting the electrical grid so they are not isolated as an island?
France. cost about 2 billion and its a 700MW HVDC cable.
What is the goal for offshore wind target for 2030 for Ireland
5 GW
What method has been suggested for electrolysers as a result of the water scarcity
desalinate sea water and use that to split into H2
What is a way to use electricity when there is no dmeand?
Use it when the price drops to make H2 in the elctrolysers
Division of emissions in agriculture
1/3 fertiliser and 2/3 from cows.
Why is CO2 from a distillery desirable?
drinks companies can market as carbon neutral as the CO2 supplied is from the distillery.
What did Audi do in Germany with the power demand?
They built an electrolyser. They spill excess electricity to their electrolyser and don’t pay anything. Built it by an AD. H2 is used with the CO2 and they make methane for vehicles to run on. So they produce biomethane and e gas. Price is based on CO2 saved.
Why is biogas upgrading done ex situ from the AD
H2 inhibits some of the bacteria from digesting.
Explain the plant in Allendorf and Biocat.
Have a 300kw electrolyser at 60% efficiency. 60m^3 H2/hour. They make 16m^3 biomethane and then 14m^3 CO2 leftover. H2 is added so you get 14m^3 e methane.
Biocat the same just a 1MW electrolyser
What quantity of Denmark’s gas is biomethane from digesters? What level will this get to by 2035 and how?
40%
65% by using electrolysers to make H2 to react with the CO2 to increase biomethane production
What is the worldwide production of methanol
110 million tonnes
Green methanol for ships, what do they have to do
Source green H2 and biogenic CO2 to make methanol
What is the Haber Bosch Process
React H2 with N2 at high temps to make NH3 (ammonia)
What is the world production of NH3 (Ammonia) and CO2 product from the conventional production
150 million tonnes. Makes 430 million tonnes of CO2 when made from natural gas.
