Towards developing a more energy-efficient and environment-friendly process for producing ultra-clean fuels in the future, we are exploring a new process concept at the Pennsylvania State University called selective adsorption for removing sulfur from liquid and gaseous fuels (PSU-SARS) at ambient conditions without using hydrogen. The idea is to explore sulfur-selective solid adsorbent for selective adsorption of organic sulfur compounds based on direct sulfur-adsorbent interaction. A number of solid sorbent materials have been designed and demonstrated in the laboratory that show specific interaction with sulfur compounds in the presence of aromatics (and olefins). TiO2-CeO2 mixed metal oxides represent an interesting type of oxidatively regenerable adsorbents developed from ongoing work in our laboratory, which show selectivity to adsorption of sulfur compounds in the presence of aromatic and olefinic compounds in liquid fuels. As an example, the adsorption selectivity trend of the selected mixed oxide materials for the various sulfur and aromatic compounds in the model liquid fuels increases in the order of Nap ∼ 1-MNap < Phen ∼ BT < 2-MBT ∼ 4,6-DMDBT < DBT < THT. More general background and results on selective adsorption desulfurization can be found in recent publications [Song et al., Catal Today, 2002, 2003, 2006; Appl Catal B: Env 2003; Ind. Eng. Chem. Res. 2003; Energy & Fuels, 2005, 2009; J Phys Chem B, 2006; J Phys Chem C, 2009]. Some examples of adsorption desulfurization processes and systems based on PSU-SARS concept will also be discussed.
All Science Journal Classification (ASJC) codes
- General Chemistry
- General Chemical Engineering