Activated Carbons Derived from Hydrothermally Carbonized Sucrose: Remarkable Adsorbents for Adsorptive Desulfurization

Abstract

Activated carbons derived from hydrothermal carbonization of sucrose and subsequent KOH activation have been prepared and tested for the adsorptive removal of refractory thiophenic compounds. Textural and chemical properties of the carbons and their corresponding impacts on adsorption rates and capacities were discussed in detail. The optimum carbon possessed high adsorption capacity (41.5mgS/g for 300ppmwS model oil), fast adsorption rate (97% saturated within 5 min) as well as relatively good selectivity for the adsorption of thiophenic compounds due to the abundant small micropores, suitable mesopore fraction and Page 1 of 35 ACS Paragon Plus Environment ACS Sustainable Chemistry & Engineering 2 various oxygen functionalities present in the carbon. Combined with the economic and environmental merits of the preparation procedure, the sucrose-derived activated carbons are promising candidates for potential practical applications.

Experimental and Computational Study of Organic Sulfur Removal Proficiency of (Ni, Cu, Co)‐Doped ZIF‐8 Adsorbents

“…As an effective alternative way, adsorptive desulfurization (ADS) have been modified to capture the sulfur content of fuels to meet the restrict recent limitations of lower than 1.0 ppm using diverse kind of adsorbents such as porous carbons derived from hydrothermal process of sucrose carbonization for the removal of thiophenic compounds, Nitrogen‐doped carbons (NCs) for the removal of 4,6‐dimethyldibenzothiophene, zeolites in selectively capturing aromatic sulfur compounds, porous silica coated on CuO‐modified SBA‐15 applied to the adsorption of CO and metal‐organic frameworks such as HKUST‐1 and CPO‐27‐Ni with high selectivity toward a multipart mixture of aromatics, paraffins, olefins, and naphthenes . Numerous advantages have been reported for ADS such as high efficiency, good selectivity, regenerability, low cost and operations in safe mode and good market prospect …”

Hierarchical Porous Nitrogen‐Doped Carbon Modified with Nickel Nanoparticles for Selective Ultradeep Desulfurization

“…The q max for CN and Ni-CN represents a significant result achieved, and comparable with the published articles with adsorbents of close resemblance for the adsorption of DBT in the liquid fuel medium. [28][29][30][31]…”

“…The performance is attributed to presence of small micropores, suitable mesopores and oxygen functional groups. [28] Nitride adsorbents such as boron nitride, carbon or graphene-like Boron-nitride, have been reported to be promising for enhanced adsorptive desulfurization performance of dibenzothiophene (DBT) and dimethyldibenzothiophene (DMDBT). [29][30][31][32] The mesoporosity of nitride nanowires containing large number of low coordinated atoms plays significant roles in adsorption performance, and maximum adsorption capacities of 65.4 mg-S/g and 33.2 mg-S/g-adsorbent were obtained for DBT and DMDBT, respectively.…”

Activated carbons derived from hydrothermal impregnation of sucrose with phosphoric acid: remarkable adsorbents for sulfamethoxazole removal

“…4a, a larger adsorbent dosage resulted in a lower adsorption amount for all the carbons, which could be attributed to the availability of more adsorption sites at higher dosages. 15 The effect of initial concentration was also investigated. As expected, an increase in the adsorption amount could be observed with a higher initial concentration, and saturation has been reached for the carbons except for C-900 in the investigated concentration range (Fig.…”

“…To develop porosity in the carbons produced by HTC, a post-treatment activation procedure with KOH, H 3 PO 4 or ZnCl 2 is usually required. For instance, KOH has been employed for the generation of porosity in our previous work, 15 where the hydrothermal char from sucrose needs to be separated and dried aer HTC, mixed with KOH by impregnation, then dried again, calcined, washed and dried for a third time to get the resulting activated ones. The whole activation process is effective, but tedious and timeconsuming.…”