Study on the Pyrolysis Characteristics of a Typical Low Rank Coal with Hydrothermal Pretreatment

被引：40

作者：

Chang, Hui ^{[1
,2
]}

Zhang, Zhuangzhuang ^{[1
,2
]}

Bang, Luyao ^{[1
,2
]}

Gao, Ting ^{[1
,2
]}

Lan, Tingwei ^{[1
,2
]}

Sun, Ming ^{[1
,2
]}

Xu, Long ^{[1
,2
]}

Ma, Xiaoxun ^{[1
,2
]}

机构：

[1] Northwest Univ, Sch Chem Engn Int Sci & Technol Cooperat Base,Sha, Minist Sci & Technol Most Clean Utilizat Hydrocar, Chem Engn Res Ctr,Minist Educ MOE Adv Use Technol, Xian 710069, Shaanxi, Peoples R China

[2] Northwest Univ, Collaborat Innovat Ctr Dev Energy & Chem Ind Nort, Xian 710069, Shaanxi, Peoples R China

来源：

ENERGY & FUELS | 2019年 / 33卷 / 05期

基金：

中国国家自然科学基金;

关键词：

GAS EVOLUTION CHARACTERISTICS; CHEMICAL-STRUCTURE; SOLVENT TREATMENT; FUNCTIONAL-GROUPS; CO2; GASIFICATION; HEATING RATE; TG-FTIR; LIGNITE; REACTIVITY; KINETICS;

D O I：

10.1021/acs.energyfuels.8b04312

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：

Coal pyrolysis characteristics are closely related to its structure and composition, and revealing the relationship between them is essential for deep understanding of the pyrolysis mechanism. Therefore, in this work, Shendong coal (SDC) was treated by hydrothermal pretreatment (HTP) to change its structure and composition, and the influence of the changes on pyrolysis characteristics was investigated. The changes in physicochemical structure and composition of treated coal samples were characterized by N-2 isothermal adsorption, Fourier transform infrared spectroscopy, C-13 nuclear magnetic resonance, X-ray diffraction, and inductively coupled plasma optical emission spectrometry. The pyrolysis experiments of raw and treated coal samples were carried out in a fluidized bed reactor. Then, the pyrolysis product distribution, the gas composition, the tar chemical composition and properties, and the char gasification behaviors were comprehensively studied. The experimental results showed the effectiveness of HTP in surface area and pore volume increase, oxygen removal and transfer, hydrogen radical introduction, and water-soluble inorganic metal removal for SDC. Correspondingly, the distribution and composition of pyrolysis products of treated coal samples changed. The pyrolysis gas quality was improved with more formation of H-2 and CH4. The tar yield and N-hexane insoluble component increased. More oxygen was enriched in macromolecular tar instead of gas and char products, enhancing the char gasification activity. In addition, the structure-activity relationship between the changes in coal structure and composition and the pyrolysis characteristics was revealed in this work.

引用

页码：3871 / 3880

页数：10

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