SOx Scrubber - NaOH Dosing Rate

NaOH consumption rate for a closed-loop EGCS - dependent on fuel sulphur mass flow and stoichiometry.

EGCSScrubberMARPOL VI

Fuel consumptiont/dayFuel sulphur% m/mSO2 removal efficiency%NaOH strength% m/m

S in fuel: 1.000t/day

Pure NaOH needed: 2.43t/day

NaOH solution (50 %): 4.85t/day

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\dot m_{NaOH} = 2 \cdot \dot m_S \cdot \eta \cdot \frac{M_{NaOH}}{M_S}

Symbol	Meaning	Unit
$\dot m_S$	Sulphur mass flow	t/day
$\eta$	SO₂ removal efficiency

Source: MEPC.184(59) EGCS Guidelines

In short

NaOH consumption rate for a closed-loop EGCS - dependent on fuel sulphur mass flow and stoichiometry.

Learn the theory Bunker Quality and ISO 8217 Marine Fuel Standards