Robust simulation-optimization framework for synthesis and design of natural gas downstream Incorporating renewable hydrogen network under uncertainty

•Natural gas downstream and renewable hydrogen network synthesis, design, and operation include uncertainity.•The two-stage stochastic formulation simultaneously considers uncertainty in 12 different model parameters.•Renewable hydrogen is produced via electrolysis and biomass gasification.•There is an improvement of 2.22% in the objective function value using the stochastic approach instead of the deterministic.