Synthesis of sulfur-doped porous carbon from heavy coker gas oil and its application in CO₂ capture

Abstract

Elemental sulfur is used to cross-link heavy coker gas oil (HKGO) with only 0.44 wt% olefinic hydrogen content in the absence of solvent; subsequent pyrolysis yields sulfur-doped porous carbon with Brunauer–Emmett–Tell (BET) surface area (s.a.) around 1714–1785 m2 g−1.

Effect of Surface Organo-Silanization on SBA-15 Mesoporous Silicas in CO2 Adsorption Processes: Design, Synthesis, and Computational Studies

“…Promising alternatives to liquid amine adsorption processes are solid sorbents as they show interesting features such as reduced energy of regeneration, greater capacity of adsorption, and the CO 2 adsorption process that is reversible so that the material can be reused several times. Among them, MOFs, − zeolites, − porous carbons, − metal-oxides, − silicas, amine-functionalized silicas, − and more recently (i) N/S doped porous carbon − materials (solid sorbents) and (ii) constructions materials where CO 2 interacts with cementitious phases leading to carbonate species being retained in the concrete have received considerable attention. It is undeniable that each solid sorbent displays not only advantages but also limitations; for instance, zeolites despite having a microporous structure, large surface areas, and specific sites for CO 2 adsorption, the gas diffusion to its micropores is difficult as a result of mass transfer limitations .…”