The hazardous organic pollutants generated from coal gasification, such as polycyclic aromatic hydrocarbons(PAHs), are highly mutagenic and carcinogenic. More researchers have paid particular attention to them. Using air and steam as gasification medium, the experiments of three kinds of coals were carried out in a bench-scale atmospheric fluidized bed gasifier. The contents of the 16 PAHs specified by US EPA in raw coal, slag, bag house coke, cyclone coke and gas were measured by HPLC to study the contents of PAHs in raw coal and the effects of the inherent characters of coals on the formation and release of PAHs in coal gasification. The experimental results showed that the distributions of PAHs in the gasified products are similar to raw coals and the total-PAHs content in coal gasification is higher than in raw coal(except Coal C). The total-PAHs contents increase and then decrease with the rise of fixed carbon and sulfur of coal while there has an opposite variation when volatile matters content increase. The quantities of PAHs reduce with the increase of ash content or the drop of heating value during coal gasification.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
SO Removal from Flue Gas by Char-Supported Fe-Zn-Cu Sorbent.
Materials (Basel)
January 2025
Key Laboratory for Advanced Coal and Coking Technology of Liaoning Province, University of Science and Technology Liaoning, Anshan 114051, China.
In this study, the mechanisms of SO adsorption on lignite char and char-supported Fe-Zn-Cu sorbent (FZC sorbent) were investigated. The FZC sorbent was prepared by the impregnation of metal components on raw coal followed by steam gasification. Flue gas desulfurization experiments were carried out on a fixed-bed reactor at 100-300 °C by using simulated flue gas containing SO/O/HO balanced by N.
View Article and Find Full Text PDFStudy on the reforming performance of liquid products from biomass staged gasification based on component analysis and simulation.
Bioresour Technol
January 2025
Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance, China Three Gorges University, Yichang 443002, PR China. Electronic address:
Biomass staged gasification technology (BSGT) divides the traditional gasification into medium-temperature devolatilization (MTD) stage, high-temperature gasification (HTG) stage and high-temperature reforming (HTR) stage. The present study conducted MTD and HTG experiments on corn stalks and focused on the effect of MTD at 200-550 °C on the reforming performance of BSGT liquid products through component analysis and simulation. The results demonstrate that the MTD temperature above 350 °C could prevent the participation of phenols and oxygen in HTG and HTR stages, respectively, thereby improving the reforming performance of BSGT liquid products and the quality of BSGT syngas.
View Article and Find Full Text PDFTargeted migration mechanisms of nitrogen-containing pollutants during chemical looping co-gasification of coal and microalgae.
J Hazard Mater
January 2025
Nanjing Yuqing Environmental Technology Co., Ltd, Nanjing 211500, China.
The chemical looping co-gasification of nitrogen-containing algal biomass and coal could effectively realize the high-value utilization of gasification products, but the mechanism of conversion of nitrogen-containing pollutants is not clear. In this work, the effects of the different ratios of microalgae on the co-gasification process were first explored, and the results showed that the 40 % coal + 60 % microalgae blending had the best synergistic effect, with a comprehensive synergistic index (CSI) of 1.35 as the maximum value.
View Article and Find Full Text PDFCharacterization of the Porosity and Permeability of Gasified Coal in UCG Process: An Experimental and Simulation Study.
ACS Omega
January 2025
State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum, Beijing 102249, China.
Under the environment of energy transformation in the world, underground coal gasification (UCG) is an important means to realize the green and clean development and utilization of deep coal resources. Due to a series of complex chemical reactions, the porosity and permeability of coal have changed significantly. Accurately characterizing the porosity and permeability of gasified coal is of great significance to the field screening, production control, and numerical simulation of the UCG project.
View Article and Find Full Text PDFDegradation mechanism of PGNa by the immobilized degrading enzymes from magnetic fermentation residue biochar.
Sci Total Environ
February 2025
Engineering Research Center of Resource Utilization of Carbon-containing Waste with Carbon Neutrality, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China; State Key Laboratory of Coal Liquification, Gasification and Utilization with High Efficiency and Low Carbon Technology, East China University of Science and Technology, Shanghai 200237, China. Electronic address:
The development of a method to efficiently remove high concentrations of penicillin G sodium (PGNa) from the environment is important for human and animal health and safety. In this study, the degradative enzymes were immobilized by adsorption using biochar from penicillin fermentation waste residue, which could efficiently remove PGNa (900 mg/L) from an aqueous solution, with a removal rate of 99.84 % within 20 min.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!