Regeneration/Optimization of Activated Carbon Monolith in Simultaneous SO₂/NO_x Removal from Flue Gas

Abstract

Due to the adverse effects of SO 2 /NO x on humans and the environment, environmental regulations necessitate the control of their emission. In this study, an activated carbon monolith was synthesized with cobalt oxide (ACM-Co 3 O 4 ) for the purpose of simultaneous SO 2 /NO x removal from flue gas generated by coal combustion. Average regeneration efficiencies of 92.7 and 94.2 % were obtained for SO 2 and NO x , respectively. The Langmuir model can adequately describe the experimental results of the ACM-Co 3 O 4 adsorbent in SO 2 and NO x removal. The key regeneration parameters were optimized by using the response surface methodology (RSM). The RSM results revealed that the statistical prediction and experimental results were in agreement.

Comparative Study of the Flue Gas Desulfurization Using Different‐Grade Natural Manganese Oxides

“…The SO 2 removal rate, the manganese conversion rate, and the sulfur capacity were calculated by Eqs. – , . …”

“…Nowadays, high amounts of poisonous gases, such as sulfur dioxide (SO 2 ) and others, mainly generated from coal and fossil oil combustion, contribute to regional acid rain pollution and urban photochemical smog, which further causes chronic hazards for human health and the destruction of the ecological environment balance . Typically, China is one of the few countries in the world where more than 70 % of the country's total energy sources are supplied by coal combustion.…”

Hydrochloric Acid‐Assisted Regeneration of Cobalt Ethylenediamine for NOx Remediation in Flue Gas

“…Therefore, to enable large-scale industrial applications of cobalt ethylenediamine, it is essential to find a way to regenerate the denitrification agent under complex flue gas conditions and prolong the denitrification time. Microbial methods, chemical reduction methods, activated carbon catalytic reduction methods, and dissociation methods are some of the popular approaches for the regeneration of denitrification solution [35][36][37]. However, high costs are incurred in the reduction using a reducing agent or activated carbon.…”

Gas-Phase Photoelectrocatalytic Oxidation of NO via TiO2 Nanorod Array/FTO Photoanodes

“…4−6 With tremendous socioeconomic development, a gradual deterioration of the environment has followed closely. 7,8 In past decades, many studies have been performed on the removal of NO x 9,10 through methods including physical adsorption 11,12 and thermal catalysis. 13−17 Among these methods, selective catalytic reduction and selective noncatalytic reduction (SCR/SNCR) technologies have been proven to be the most effective routes.…”

“…Nitrogen oxides (NO x ) mainly include nitric oxide (NO) and nitric dioxide (NO 2 ) emitted from stationary sources such as power plants and motor exhaust, − which are the main contributors to ozone depletion and the formation of urban smog. − With tremendous socioeconomic development, a gradual deterioration of the environment has followed closely. , In past decades, many studies have been performed on the removal of NO x , through methods including physical adsorption , and thermal catalysis. − Among these methods, selective catalytic reduction and selective noncatalytic reduction (SCR/SNCR) technologies have been proven to be the most effective routes. Nearly all power plants need to be equipped with SCR/SNCR devices to reduce NO x emission to meet the required emission standards.…”