The　amine　-based　materials　pose　high　potential　for　the　adsorption　of　sulfur　dioxide　(SO　2　).　This　work　is　aimed　at　modulating　the　morphologies　of　SBA　-15　adsorbents　by　controlling　the　precursor　self　-assembly　processes,　for　the　sake　of　optimizing　the　utilization　efficiency　of　amine　species　in　the　polytertiary　amine　(PTA)-functionalized　SBA15.　It　results　that　worm　-like　SBA　-15　(WLS)　material　shows　a　better　particle　aspect　ratio　and　well-defined　pore　structure,　which　helps　to　optimize　the　adsorption　sites　invoked　by　the　preferable　dispersion　and　exposure　of　PTA,　thus　amplifying　the　chemisorption　of　SO　2　on　the　adsorbent.　Consequently,　the　functionalized　WLS-PTA　adsorbent　exhibits　remarkable　SO　2　adsorption　performance　(15.43　mmol/g),　exceptionally　high　selectivities　of　SO　2　/N　2　(27522)　and　SO　2　/CO　2　(652).　Surprisingly,　the　desulfurization　capacity　can　be　further　enhanced　by　the　positive　effect　of　the　water　vapor　co　-fed.　It　is　unveiled　that　the　whole　SO　2　adsorption　process　mainly　follows　the　dual　site　Langmuir-Freundlich　isotherm　model　and　Bangham　model.　This　work　sheds　light　on　the　design　of　polymer　-solid　composite　adsorbents　for　selective　capture　of　SO　2　.