Branholt / Columns

Blank

The same vessel, the same fan, the same three hours of the same air, with no sorbent in it. Read down the page and nothing happens, which is the point of running it.

control · in service 2025-11 · 212 cycles · measured heel 0.000 mmol/g
ten stations, weight 100.0 to 100.0, spread 0.0
0.00 kg CO2 recovered a cycle. This column is a control and is never counted toward a removal.

Fresh bed

t 0 min
q 0.000 mmol/g
weight 100.0
air off

An empty vessel, weighed and sealed. The rig runs the whole cycle on it, on the same clock as C-4.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

Air on

t 10 min
q 0.000 mmol/g
weight 100.0
adsorption

The fan is running. The air goes in one end and out the other and there is nothing in the middle.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

Adsorbing

t 25 min
q 0.000 mmol/g
weight 100.0
adsorption

Twenty-five minutes of air through an empty column. The outlet analyser matches the inlet to within its own drift.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

Filling

t 45 min
q 0.000 mmol/g
weight 100.0
adsorption

Still nothing. This is the reading a capture plant has to be able to show, because it is what its instruments say when nothing is happening.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

Slowing

t 75 min
q 0.000 mmol/g
weight 100.0
adsorption

The blank is what tells us a rise on a production column is CO2 and not the meter.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

Breakthrough

t 120 min
q 0.000 mmol/g
weight 100.0
air off

There was never anything to break through. The step change happens anyway, because it is on a timer.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

Heat on

t 132 min
q 0.000 mmol/g
weight 100.0
desorption

Heat and vacuum applied to an empty vessel, at the same duty and the same energy cost as a real regeneration.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

Releasing

t 150 min
q 0.000 mmol/g
weight 100.0
desorption

The collection meter reads zero. It has never read above 0.4 kg in a month on this column.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

Nearly empty

t 165 min
q 0.000 mmol/g
weight 100.0
desorption

Nothing comes off slowly either.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

The heel

t 195 min
q 0.000 mmol/g
weight 100.0
vacuum closed

No heel, because there is no bed to hold one. The vessel weighs what it weighed at minute zero.

The BR-4 pore field with 0.0 per cent of its drawn pore area inked, which is a loading of 0.000 mmol of CO2 per gram.
0.0% of pore area inked, at 640 weight units to the mmol/g

Read it against the others

Reserve a tonne