Robust PSD determination of micro and meso-pore adsorbents via novel modified U curve method

► Conventional techniques (LOOCV, U-curve & modified L-curve) may drastically fail on finding optimal PSD from noisy isotherms. ► A new criterion (MUC) is presented for efficient and convenient estimation of the optimal regularization level (λ*). ► The new criterion is simpler and provides reliable estimation of λ* compared to other conventional methods. ► Efficient computation of L-corner has also received proper attention and a simple algorithm is presented for this purpose.