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Parent and amine-functionalized analogues of metal–organic frameworks (MOFs), UiO-66(Zr), MIL-125(Ti), and MIL-101(Cr), were evaluated for their hydrogen sulfide (H₂S) adsorption efficacy and post-exposure acid gas stability. Adsorption experiments were conducted through fixed-bed breakthrough studies utilizing multicomponent 1% H₂S/99% CH₄ and 1% H₂S/10% CO₂/89% CH₄ natural gas simulant mixtures. Instability of MIL-101(Cr) materials after H₂S exposure was discovered through powder X-ray diffraction and porosity measurements following adsorbent pelletization, whereas other materials retained their characteristic properties. Linker-based amine functionalities increased H₂S breakthrough times and saturation capacities from their parent MOF analogues. Competitive CO₂ adsorption effects were mitigated in mesoporous MIL-101(Cr) and MIL-101–NH₂(Cr), in comparison to microporous UiO-66 …