Biogas to Methanol Process Simulator

Biogas Feed

Biogas Flow Rate (Nm³/h) Normal m³/h at 0 °C, 1 atm

CH₄ Content: 60.0%

Typical biogas: 50–70% CH₄

CO₂ Content: 40.0%

Auto-set as 100 − CH₄%

Steam Input

Steam-to-Carbon Ratio (S/C): 2.50

Excel default: 2.5 | Recommended ≥ 2.5 for SMR

Calculated Flows (STP)

CH₄ flow

—

CO₂ flow

—

Steam Required

—

Biogas mass flow

—

Methanol output

—

Syngas Stoich. Number

—

— SN = (H₂−CO₂)/(CO+CO₂)

H₂/COx ratio: —

MeOH Production

—

ton / year

Total Power

—

kW (elec.)

Total Cost (LCOM)

€—

per ton MeOH

Detailed Economic Analysis

Cost Component	Power (kW)	Annual Cost (k€)	Cost per Ton (€)

Equipment Summary

SMR Reactor

Diameter—

Length—

Catalyst bed—

MeOH Reactor 1

Diameter—

Length—

MeOH Reactor 2

Diameter—

Length—

Total CAPEX (Denmark)

Installed cost—

Incl. 18% contingency

+ location factor 1.54×

⚠️ Accuracy note: This calculator uses DWSIM-calibrated yield and energy factors (5500 kg/h reference case, 60% CH₄, no H₂). Accuracy is approximately ±10–15% vs full DWSIM simulation for the base case; larger deviations expected at compositions far from 60% CH₄ or with H₂ co-feed. CAPEX correlations are Turton 2018 (±30% inherent uncertainty). Not suitable for investment decisions without full process simulation.