How do you calculate sorbent replacement cost?

Multiply the sorbent makeup rate (kg/hr) by the runtime (hr) to get kilograms consumed, then multiply by the sorbent price ($/kg). At 12 kg/hr for 8 hr that is 96 kg, and at $3.50/kg the replacement cost is $336.

What is a good sorbent makeup rate?

There is no single target, but a healthy fluidized or fixed-bed amine-on-silica system typically loses well under 1% of bed inventory per cycle. Track makeup rate per tonne of CO₂ captured rather than per hour so you can compare across throughputs.

Why is my sorbent consumption rising over time?

Rising makeup usually signals increased attrition from mechanical breakage, fines carryover, or chemical degradation from oxygen, SOx or NOx in the flue gas. A climbing kg/hr at constant throughput is an early warning to inspect cyclones and sample the bed.

Sorbent consumption vs solvent makeup, which is cheaper?

It depends on the system. Solid sorbents avoid solvent reclaiming but suffer attrition; liquid solvents avoid attrition but degrade and need reclaiming. Run both calculators with your own makeup rates and prices to compare on a per-tonne-CO₂ basis.

How do I lower sorbent replacement cost?

Reduce attrition by softening fluidization velocity, improving cyclone capture of fines, controlling regeneration temperature, and pre-treating flue gas to remove degradation agents. Each lowers the makeup rate that drives this cost.

Carbon Capture & CO₂ Compression Equipment calculator

Sorbent Consumption Calculator

Solid-sorbent CO₂ capture systems lose active material to attrition, fines elutriation and thermal degradation, so a steady makeup feed is needed to hold capture efficiency. This calculator converts the sorbent makeup rate, the hours the contactor runs and the delivered sorbent price into a replacement cost for the period. Process engineers and plant cost accountants use it to budget consumables and to flag when attrition losses are eroding margin on a capture train. Because sorbent is often one of the largest recurring OPEX lines after energy, even a small drift in makeup rate compounds quickly across a year of runtime.

What this calculator does

Estimate sorbent replacement or makeup cost for a carbon capture bed, cartridge, contactor, or DAC module over a planned operating period.
Use it when sorbent consumption in carbon capture and co₂ compression equipment is being quoted and consumables are a real chunk of the cost stack.
It multiplies sorbent makeup rate by runtime to get total sorbent consumed, then multiplies by unit price to get the replacement cost.

Formula used

Sorbent consumed = sorbent makeup rate × capture system runtime
Sorbent replacement cost = sorbent consumed × sorbent cost

Inputs explained

Sorbent makeup rate:
Capture system runtime:
Sorbent cost:

How to use the result

Use it for shift, daily or campaign-length budgeting of sorbent consumables and when comparing attrition rates between sorbent batches or vendors.
It assumes a constant makeup rate; real attrition spikes during startup, thermal cycling and fluidization upsets, so a flat hourly rate understates cost during transient operation.

Current U.S. benchmarks

Industrial electricity averages 8.66 cents per kWh across the U.S. (EIA, Apr 2026), up 5.5% from a year earlier. Energy-intensive steps carry this directly into unit cost.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate sorbent replacement cost? Multiply the sorbent makeup rate (kg/hr) by the runtime (hr) to get kilograms consumed, then multiply by the sorbent price ($/kg). At 12 kg/hr for 8 hr that is 96 kg, and at $3.50/kg the replacement cost is $336.
What is a good sorbent makeup rate? There is no single target, but a healthy fluidized or fixed-bed amine-on-silica system typically loses well under 1% of bed inventory per cycle. Track makeup rate per tonne of CO₂ captured rather than per hour so you can compare across throughputs.
Why is my sorbent consumption rising over time? Rising makeup usually signals increased attrition from mechanical breakage, fines carryover, or chemical degradation from oxygen, SOx or NOx in the flue gas. A climbing kg/hr at constant throughput is an early warning to inspect cyclones and sample the bed.
Sorbent consumption vs solvent makeup, which is cheaper? It depends on the system. Solid sorbents avoid solvent reclaiming but suffer attrition; liquid solvents avoid attrition but degrade and need reclaiming. Run both calculators with your own makeup rates and prices to compare on a per-tonne-CO₂ basis.
How do I lower sorbent replacement cost? Reduce attrition by softening fluidization velocity, improving cyclone capture of fines, controlling regeneration temperature, and pre-treating flue gas to remove degradation agents. Each lowers the makeup rate that drives this cost.

Last reviewed 2026-05-12.