Removal of organic sulfur compounds from diesel by adsorption on carbon materials

Abstract

<jats:title>Abstract</jats:title><jats:p>Removal of organic sulfur compounds from diesel by adsorption on different carbon materials, including activated carbons (ACs), carbon aerogels, carbon nanotubes, and AC cloths, was reviewed. The effect of the textural and surface chemistry property of carbon on desulfurization performance, carbon surface modification, adsorption mechanism, and adsorbent regeneration and the effect of other components, including aromatics, additives, nitrogen compounds, and moisture, on adsorptive desulfurization of diesel fuel were also discussed in detail. Carbon materials showed very high selectivity for removing the dibenzothiophenes, especially for 4,6-dimethyldibenzothiophene, which is very difficult with hydrodesulfurization and other adsorbents. Both the textural and chemical properties of AC have an important impact on the adsorption of DBTs. Adsorption selectivity and capacity can be enhanced further by carbon surface modification. Considering the effect of diffusion hindrance and regeneration, mesoporous carbon is more suitable than microporous carbon with pore size &lt;2 nm. It is necessary to eliminate the inhibiting effect of fuel additive and nitrogen compounds on the DBTs before carbon materials are used for desulfurization of real diesel fuel. In the end, some useful suggestions are also made.</jats:p>

Adsorptive Removal of Indole and Quinoline from Model Fuel over Various UiO-66s: Quantitative Contributions of H-Bonding and Acid–Base Interactions to Adsorption

“…Moreover, the consumption of fossil fuels without proper pretreatment is responsible for environmental pollution, especially the emission of NOx and SOx, which are discharged by the combustion of nitrogen- and sulfur-containing compounds (NCCs and SCCs, respectively) in fossil fuels. , Both NOx and SOx are considered as air pollutants and are responsible for acid rain, which has adverse effects on the environment and manmade structures. Therefore, removing NCCs and SCCs from fuels is very important , and several research groups worldwide have been actively working on this aspect in the recent decades …”

“…4,5 Both NOx and SOx are considered as air pollutants and are responsible for acid rain, 6 which has adverse effects on the environment and manmade structures. Therefore, removing NCCs and SCCs from fuels is very important 7,8 and several research groups worldwide have been actively working on this aspect in the recent decades. 9 SCCs in fuels have been effectively and widely removed by the hydrodesulfurization (HDS) process for a long time.…”

Remarkable adsorptive removal of nitrogen-containing compounds from a model fuel by a graphene oxide/MIL-101 composite through a combined effect of improved porosity and hydrogen bonding

“…However, compared with HDS, HDN requires high temperature and pressure along with a huge amount of hydrogen because, unlike HDS, HDN is carried out after the destruction of the cyclic rings of NCCs. Double bonds are usually broken by hydrogenation during HDN [4,5], and HDN is a kinetically slow multistep process [6]. Therefore, drawbacks of HDN have motivated researchers to find a more viable NCC removal technique.…”

Novel phenolic deep eutectic solvents for desulfurisation of petrodiesel

“…Similarly, Xu and Yu and co-researchers found that the comparatively high quantity of water in real diesel fuel requires additives to remove it. However, these additives have a negative influence on desulfurisation [54,55]. In addition, owing to the complicated conformation of commercial diesel, including impurities made up of various aromatic species, organic nitrogen and oxygen species, the sulfur removal efficiency decreases.…”