Suppression of crosslinking combination of carboxyl functional groups with NaOH on combustion performance of Shengli lignite

被引：21

作者：

Yan, Zhenghao ^{[1
]}

Chen, Jiaming ^{[1
]}

He, Runxia ^{[1
]}

Li, Na ^{[1
]}

Zhou, Huacong ^{[1
]}

Song, Yinmin ^{[1
]}

Ban, Yanpeng ^{[1
]}

Zhi, Keduan ^{[1
]}

Teng, Yingyue ^{[1
]}

Liu, Quansheng ^{[1
]}

机构：

[1] Inner Mongolia Univ Technol, Coll Chem Engn, Inner Mongolia Key Lab High Value Funct Utilizat, Hohhot 010051, Inner Mongolia, Peoples R China

来源：

FUEL | 2018年 / 227卷

基金：

中国国家自然科学基金;

关键词：

Shengli lignite; NaOH treatment; Sodium carboxylate; Microstructure; Combustion performance; LOW-TEMPERATURE OXIDATION; VICTORIAN BROWN-COAL; OPEN PULVERIZING SYSTEM; LOW-RANK COALS; XILINHAOTE LIGNITE; BITUMINOUS COAL; FT-IR; GASIFICATION; PYROLYSIS; ALKALI;

D O I：

10.1016/j.fuel.2018.04.058

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：

080707 [能源环境工程]; 082001 [油气井工程];

摘要：

It is important to inhibit the spontaneous combustion of lignite for its safe transportation and efficient utilization. Shengli lignite was treated with a NaOH solution and the as-prepared coal samples were extensively characterized by SEM-EDS, XRD, FT-IR, XPS, and Raman spectra techniques. The combustion properties of NaOH treated lignite were determined by TGA. The results show that NaOH treatment played a significant inhibitory effect on the combustion performance of Shengli lignite. The NaOH treated lignite showed two weight loss temperature regions. The temperature corresponding to the maximum combustion rate of Shengli lignite after the NaOH pretreatment was about 350-400 degrees C, higher than that of untreated sample, indicating that NaOH treatment significantly decreased the combustion reactivity of Shengli lignite. FT-IR and XPS analyses identified the analogous sodium polycarboxylic acid, originating from the crosslinking combination of carboxyl functional groups with NaOH. It is deduced that the suppressing effect of NaOH treatment on the combustion performance of lignite maybe attributed to the higher stability of analogous sodium polycarboxylic acid.

引用

页码：13 / 20

页数：8

共 52 条

[1]

Low-temperature oxidation of some Turkish coals [J].