Effect of lignite as support precursor on deep desulfurization performance of semicoke supported zinc oxide sorbent in hot coal gas

Abstract

Effect of lignite as support precursor on desulfurization performance of semicoke supported zinc oxide sorbent.

Rotten Eggs Revaluated: Ionic Liquids and Deep Eutectic Solvents for Removal and Utilization of Hydrogen Sulfide

“…However, the adsorption capacity of ZnO is quite low at room temperature due to slow kinetics. Supporting ZnO on porous materials (e.g., mesoporous silica, activated carbon, , ceramic, molecular sieve, semicoke, etc. ), mixing with other metal oxides, − and doping with impurity atoms are simple and effective methods to increase the specific area of the adsorbents, and thus improve H 2 S adsorption capacity.…”

Remediation with Semicoke-Preparation, Characterization, and Adsorption Application

“…Pyrolysis time, coal particle size, and environmental pressure are classified as some essential ingredients to produce high yielding SC [ 11 ]. For instance, high-pressure impregnation and heat treatment methods have proven to yield good-performing desulfurization SC adsorbents [ 34 ]. The use of fluidized bed reactors [ 18 ], fixed bed reactors [ 44 ], and drop tube reactors [ 45 ] have recently been reported as reducing the amount of SC produced during gasification processes.…”

“…The formations and assemblages of SC can be studied by observing, surface morphologies, crystalline structural formations, and diffraction analysis. The surface behavior and constituent composition are popularly determined by infrared spectroscopy, which can analyze its aromaticity growth [ 34 ]. Specific surface area (SSA) is conducted popularly and most reported on according to Brauner–Emmet–Taller (BET) method while a scanning electron microscopy analysis (SEM) is performed for surface morphologies.…”

“…The presence and abundance of oxygen-containing functional groups (C═O and C—O), π-π electron-donor acceptor interactions, and phenolic hydroxyl groups on its surface contribute to the process, the number of which differ based on the type of SC. Lignite SC has a high predominance of these formations [ 34 ].…”

“…Lignite prepared SC as precursors of desulfurization was found to have a sulfur adsorption capacity of 3.69 g/100 g of the sorbent. The pore structure and the relative changes under high-pressure impregnation supported by oxygen functional groups influence the adsorption process [ 34 ]. Similarly, modified SC supported by Fe 2 O 3 sorbent was employed for the desulfurization test for which the sorbent obtained a 9% yield capacity [ 94 ].…”