Methods for the determination of composition, mineral phases, and process-relevant behavior of ashes and its modeling: A case study for an alkali-rich ash

被引：11

作者：

Reinmoller, Markus ^{[1
]}

Kong, Lingxue ^{[2
,3
]}

Laabs, Marcel ^{[1
]}

Ge, Zefeng ^{[2
,3
]}

Hommel, Caroline ^{[1
]}

Farid, Massoud Massoudi ^{[1
]}

Shi, Wenju ^{[2
,3
]}

Schreiner, Marcus ^{[1
,4
]}

Cao, Xi ^{[2
,3
]}

Guhl, Stefan ^{[1
]}

Bai, Jin ^{[2
,3
]}

Meyer, Bernd ^{[1
,2
,3
]}

机构：

[1] TU Bergakad Freiberg, Inst Energy Proc Engn & Chem Engn IEC, Fuchsmuhlenweg 9, D-09599 Freiberg, Germany

[2] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, 27 Taoyuan Rd, Taiyuan 030001, Peoples R China

[3] Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China

[4] Fraunhofer Inst Microstruct Mat & Syst IMWS, Branch Circular Carbon Technol, Walter Hulse Str 1, D-06120 Halle, Germany

来源：

JOURNAL OF THE ENERGY INSTITUTE | 2022年 / 100卷

基金：

中国国家自然科学基金;

关键词：

Ash; Ashing temperature; Chemical composition; Mineral phases; Ash fusion behavior; Experimental and modeling methods; VICTORIAN BROWN-COAL; FUSION CHARACTERISTICS; MELTING BEHAVIOR; BIOMASS ASHES; PHYSICOCHEMICAL PROPERTIES; POTASSIUM MIGRATION; REDUCING ATMOSPHERE; STEAM GASIFICATION; COMBUSTION SYSTEMS; TEMPERATURE COAL;

D O I：

10.1016/j.joei.2021.11.001

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The mineral matter contained in feedstocks has a generally limiting impact on the process design of hightemperature conversion processes. In the present study, the composition, mineral phases, and process-relevant properties of ashes are investigated by different experimental and modeling methods, which were reviewed in the literature regarding the frequently applied methods. Various analyses are exemplarily performed for the ashes of a high-sodium coal from China, generated at temperatures of 150-950 degrees C. X-ray fluorescence (XRF) analysis, microwave-assisted inductively-coupled plasma optical emission spectrometry (MW-ICP-OES), and the same technique with electrothermal vaporization (ETV-ICP-OES) are applied to analyze the chemical composition of the bulk material. The chemical composition of the near-surface region is studied by scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX). Mineral phases are analyzed by X-ray diffraction (XRD) and thermochemical calculations. The process-relevant ash fusion behavior is studied by a common ash fusion test (AFT) and thermomechanical analysis (TMA) and supported by thermochemical calculations. The different ashing temperatures have a recognizable impact on the composition, formation and transformation of mineral phases, and resulting ash fusion behavior, while each property is monitored by at least two different methods. For this purpose, a detailed analysis of the results achieved by the individual methods is performed. Finally, the results obtained by different methods for the same ash property are compared for monitoring the validity of the results and, for example, extracting additional information about the gas phase transfer of selected ash components.

引用

页码：137 / 147

页数：11