Regeneration Performance of Activated Carbon for Desulfurization

Zhiguo Sun,Yue Zhou,Li Zhang,Jiaming Fan,Menglu Wang

doi:10.3390/app10176107

Zhiguo Sun, Yue Zhou + Show 3 more

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https://doi.org/10.3390/app10176107

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Journal: Applied sciences	Publication Date: Sep 3, 2020
Citations: 9	License type: CC BY 4.0

Affiliation: Shanghai Second Polytechnic University

Abstract

This study explored the regenerated performance of activated carbon (AC) as SO2 adsorbent. The optimal conditions of SO2 removal were determined by experiment, and then the adsorption efficiency of AC was studied by a method of thermal regeneration. The characteristics of regenerated AC were analyzed by Brunauer-Emmett-Teller (BET) and Scanning Electron Microscopy (SEM) methods. The test results showed that the most suitable adsorption conditions were using 4 g of activated carbon, 1.65 L/min gas flue rate, and 5% O2. During the ten regenerations, the desulfurization efficiency and sulfur capacity of AC still maintained a high level. The characterization results showed that the increase of material surface area and pore volume were 101 m2 g−1, and 0.13 cm3 g−1, respectively, after the cycles.

Highlights

SO2 is the major air contaminant released in industrial activities
From the aspects of pore structure, the surface of the samples appeared to have a structure with micropores and mesoporous (Figure 2b) after thermal regeneration
2 rates, adsorption efficiency was experimentally studied with efficiency of was observed under the current optimum adsorption conditions for a number of 10 flue gas flow rates, and oxygen contents

Summary

Introduction

SO2 is the major air contaminant released in industrial activities. This gas is mainly generated from the combustion of fossil fuels (coal, oil, and gas), which is for power generation and the smelting of mineral ores, like copper, aluminum, zinc, lead, and iron [1]. SO2 produced by industry can cause acid rain, which contributes to air pollution, soil acidification, water pollution, and destruction of building structures [2]. These environmental problems affect human health, social security, and ecological harmony [3]. Several efficient technologies have been employed for the removal of SO2 in industrial production by most countries [4]. Porous solid sorbents, such as activated carbon (AC), zeolites, alumina, and zirconia, attract much attention owing to their characteristics of cheap, low energy consumption, and easy regeneration [5,6]

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