coal desulfurization process

مصنع لتجهيز البوكسيت/coal desulfurization process

Evaluation of the microwaveassisted organic acid separation ... Springer

Abstract To explore the feasibility of organic sulfur removal using organic acids, oxalic acid, citric acid and ascorbic acid were selected as desulfurization reagents. Combined with microwave irradiation technology, desulfurization experiments of highsulfur coal treated with nitric acid were conducted. The orthogonal experimental results showed that the microwave synergistic citric acid ...

Desulfurization mechanism of highsulfur coal by ... ScienceDirect

Coal desulfurization The development and utilization of traditional coal plays a vital role in promoting social and economic development, but it has brought irreversible pollution to the ecological environment ( Zeng et al., 2021 ).

Comprehensive evaluation of flue gas desulfurization and ... Springer

Since the "Eleventh FiveYear Plan" period, the construction of flue gas desulfurization and denitrification facilities for coalfired power plants have been accelerated to control the emissions of sulfur dioxide (SO 2) and nitrogen oxides (NO X) and thus to address the issue of acid rain in to the goal of the "Thirteenth FiveYear Plan for Energy Saving and Emission ...

Coal desulfurization (Journal Article) |

Coal desulfurization Full Record Related Research Abstract The Meyers process of removing pyritic sulfur from coal chemically before it is burned is presented.

Nonthermal effect of microwave on organic sulfur removal from coal by ...

XANES was used to analyze the change of sulfur forms in the desulfurization process of high organic sulfur coal under microwave heating and conventional heating conditions. The effects of microwave fields on the molecular properties, bond strength and reaction kinetic of organic sulfurcontaining groups were studied by quantum chemical calculation.

Speciation and thermal transformation of sulfur forms ... ScienceDirect

XANES was used to analyze the change of sulfur forms in the desulfurization process of high organic sulfur coal under microwave heating and conventional heating conditions. The effects of microwave fields on the molecular properties, bond strength and reaction kinetic of organic sulfurcontaining groups were studied by quantum chemical calculation.

Chemical Thermodynamics and Kinetics of Thiophenic Sulfur ... Springer

The increasing use of highsulfur coal contradicts with the stringent environmental pressure in metallurgical industry. Microwave has been confirmed to have efficient effect for coal desulfurization. However, the removal behavior of thiophenic sulfur, as the most difficult sulfur to remove from coal, is still unclear in microwave field. In this work, the feasibility of removing thiophenic ...

An extremely rapid, convenient and mild coal desulfurization new ...

The present work describes the desulfurization of coal using mildly reductive method. Both a Yanzhou and a Yanshan coal (referred to as YZ and YS coal, respectively), were treated in an aqueous media employing sodium borohydride (NaBH 4) as reducing agent, which is a well known hydrogen variables investigated include concentration of reductant, time, pH of initial media ...

Biodesulfurization of coal using Wiley Online Library

In addition, the sulfur content of the raw coal reduces from % to %, total desulfurization rate of %, whose organic sulfur desulfurization is % after coal in shake flask experiments. And the desulfurization rate approaches the maximum value on the tenth day (from Figure 2B). It was demonstrated that strain SX12 could ...

PDF Desulfurization of Coal EOLSS

Flue gas desulfurization (FGD) removes the SO2 from the flue gas of coalfired plants. This postcombustion method is the most widely used technology for controlling SO2 emissions.

A technological review of developments in chemicalrelated ...

Coal desulfurization Acid leaching Alkaline leaching Oxidation Microwave Ultrasonic 1. Introduction The main uses of coal are to produce coke for iron smelting, or to generate power for social development, or even to provide raw materials for industrial applications.

Control of different pyrite forms on desulfurization of coal with ...

The study aims to develop a thorough understanding of the desulfurization process and establish a theoretical framework for advancing clean coal technology and efficient coal utilization. Stringent control was maintained over parameters such as particle size, pretreatment time, bacterial species, and bacterial concentration.

Flue gas desulfurization (FGD) fly ash as a sustainable, safe ...

As a typical industrial byproduct during the flue gas desulfurization process of coalfired, flue gas desulfurization ash (FGDA) with alkali mineral can facilitate the water damage resistance of asphalt mixtures. However, low density and high hydrophilic coefficient of FGDA limit its improvement effect. Hence, the comprehensive moisture ...

Perspectives in desulfurization of coal using microbes

The process of sulfur removal by microbes is carried out by enzymes and is considerably influenced by different factors, including pH, temperature, nutrient composition, shaking or standing condition, coal types, and most importantly type of microorganisms used.

Dry flue gas desulfurization process for various coals

Flue gas desulfurization (FGD) processes have been widely used since the early 1970's for control of sulfur dioxide emissions from coalfired power plants. First generation FGD systems employ ''wet processes'' whereby the flue gas is contacted with a solution or slurry of an alkali reagent. Most of these installations use either lime or limestone.

A review of sorbents for hightemperature hydrogen sulfide ... Springer

Hot coal gas desulfurization process operating at elevated temperature (600850 °C) is an efficient and environmentally friendly process for raw syngas purification (Tamhankar et al. 1986). The sketch of hot coal gas desulfurization process is depicted in Fig. 1. Coal was gasified at temperatures of > 1000 °C to produce raw syngas (~ 850 ...

The approach of biodesulfurization for clean coal technologies: a ...

For future approaches, as well as desulfurization process, increasing the purity of coal may also promote the value of coal and prevent environment pollution. In the study of Etemadifar et al., growing and resting cells of heterotrophic Rhodococcus erythropolis strains PD1, R1, and FMF, and R. qingshengii were utilized in sulfur removal and ...

Desulphurisation an overview | ScienceDirect Topics

Wet Desulfurization Technology (WFGD) is the main process for flue gas desulfurization in coalfired power plants in China, mainly including limestonegypsum wet method and seawater desulfurization. At the end of 2014, more than % of the desulfurization equipment was WFGD.

Desulfurization of coal using four ionic liquids with [HSO4]−

The objective of this study is to develop the extractiveoxidative desulfurization process for cleaning fuel production from coal with ionic liquids, which can be carried out under mild condition. ... Exploration on the action mechanism of microwave with peroxyacetic acid in the process of coal desulfurization. Fuel, Volume 214, 2018, pp. 554560.

Mapping the knowledge domain of microbial desulfurization ... Springer

At present, the desulfurization technology is divided into pretreatment, inuse treatment, and posttreatment. Inuse treatment, in the case of coal, is generally defined as the spraying of desulfurizer into the coalburning boiler, which is capable of converting SO 2 and SO 3 emissions from coal combustion into sulfites or sulfates (Lu et al. 1998; Sun et al. 2018).

Mass flows and characteristic of mercury emitted from coalfired power ...

This study investigated the characteristics of mercury emitted from a largescale coalfired power plant in Taiwan via intensive sampling campaigns. The air pollution control devices equipped in this coalfired power plant include selective catalytic reduction, fabric filter and seawater flue gas desulfurization. During three sampling campaigns, mercury concentrations emitted from this large ...

Microorganisms in Coal Desulfurization (Review) | SpringerLink

The desulfurization process took place at a pH of 35, the coalparticle size was 7545 μm, the pulp density was 5%, the temperature was 35°C, and the incubation time was 8 h. Chemical studies also revealed a decrease in the ash content and an increase in the calorific value of coal from 6219 cal/g to 6406 and 6315 cal/g, which indicated ...

(PDF) Progress of Desulfurization and Denitration Technology of Flue ...

environment, the desulfurization and denitration of flue gas in the combustion process of coal has become an important step. T his work summarizes the desulfur ization and denitration

BioDesulfurization of Coal Using Biotechnological Approach ... Springer

Mechanism of Pyrite Microbial Desulfurization. The oxidation process of coal conversion is possible by microorganisms after getting influenced by the polyfunctional coal structure and this process usually depends on two main factors: size or shape of coal and surface properties of microorganisms (Konishi et al. 1990). The morphology and ...

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