Characteristics of oxidation stabilization process of coal pitch based spheres

GUO Yuan; SHAO Yingjuan; ZHONG Wenqi; LI Kaixi

doi:10.11949/j.issn.0438-1157.20171042

您当前的位置：

首页 >

文章列表页 >

Characteristics of oxidation stabilization process of coal pitch based spheres

更新时间：2025-12-10

- Characteristics of oxidation stabilization process of coal pitch based spheres
- CIESC Journal Issue 1, Pages: 499-506(2018)
- 作者机构：
  
  1. 东南大学能源热转换及其过程测控教育部重点实验室, 能源与环境学院,江苏,南京,210096
  2. 中国科学院山西煤炭化学研究所,山西,太原,030001
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20171042
  CLC： Q424.1TQ522.65
- Online First：05 January 2018，
  
  Published：05 January 2018
- 稿件说明：
移动端阅览
GUO Yuan, SHAO Yingjuan, ZHONG Wenqi, et al. Characteristics of oxidation stabilization process of coal pitch based spheres[J]. CIESC Journal, 2018, (1): 499-506.
DOI：

GUO Yuan, SHAO Yingjuan, ZHONG Wenqi, et al. Characteristics of oxidation stabilization process of coal pitch based spheres[J]. CIESC Journal, 2018, (1): 499-506. DOI： 10.11949/j.issn.0438-1157.20171042.

摘要

氧化不熔化过程是煤沥青基球状活性炭制备中的核心工艺，对其过程特性和动力学机理的认识是实现氧化过程工艺优化的关键。本文以煤沥青萃取球为原料，通过实验研究，重点探讨了粒径范围、升温速率和氧化温度对其氧化不熔化过程的影响，并确定氧化动力学参数及其反应机理函数。结果表明：氧化不熔化过程可分为轻组分热解、初步氧化、氧化增重和恒温氧化失重4个阶段。煤沥青球经过氧化不熔化后，C、H含量减少，O含量增加，表面光滑平整。减小粒径并选取合适的升温速率（0.25～0.5℃·min-1）以及氧化温度（275～325℃），更有利于氧化不熔化快速稳定地进行。粒径范围为0.3～0.6 mm的煤沥青球在升温速率为0.5℃·min-1、氧化温度为300℃的条件下活化能最小，各个阶段的值分别为83.34、293.19、302.25和357.05 kJ·mol-1。

Abstract

Oxidation stabilization is the core process in the preparation of coal pitch based spherical activated carbon. Consequently the understanding of process characteristics and kinetic mechanism is the key to accomplish oxidation process optimization. The effects of particle size range

heating rate and oxidative temperature on oxidation stabilization process were discussed by experiments which used coal pitch spheres as the raw materials. The kinetic parameters and reaction mechanism function were determined. The results show that oxidation stabilization mainly consists of four stages

light component pyrolysis

preliminary oxidation

oxidative weight increment and constant temperature oxidative weightlessness

respectively. After oxidation stabilization

carbon and hydrogen content of coal pitch spheres reduce

oxygen content increases

and surface is much smoother. Reducing the particle size and selecting the appropriate heating rate(0.25-0.5℃·min-1) and oxidative temperature(275-325℃) are beneficial for oxidation stabilization. The activation energy reaches the minimum values at particle size range of 0.3-0.6 mm

heating rate of 0.5℃·min-1 and oxidative temperature of 300℃

which are 83.34

293.19

302.25 and 357.05 kJ·mol-1 in every stage.

关键词

Keywords

references

Views

194

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Experimental study on the low to medium temperature oxidation characteristics and kinetics of micro-size iron powder

Catalytic degradation of dissolved organic matter in rifampicin pharmaceutical wastewater by Fenton oxidation process

Selective electro-oxidation of bromide ion in potassium-extracted brine from rock salt mines

The CO2 adsorption performance under flue gas for TEPA-impregnated composited oxidized activated carbon

Kinetics of ethanol oxidation over Pt/ZSM-5 catalyst

Related Author

WEI Xueyan

QIAN Yong

ZHANG Quanbi

YANG Yijin

GUO Xujing

Chenyu SU

Ying YANG

Xingfu SONG

Related Institution

School of Mechanical Engineering, Shanghai Jiao Tong University

College of Resources and Environment, Chengdu University of Information Technology

National Engineering Research Center for Comprehensive Utilization of Salt Lake Resources, East China University of Science and Technology

Joint International Laboratory for Potassium and Lithium Strategic Resources, East China University of Science and Technology

State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University

⁰