Citation: ZHOU Jian-lin, WANG Yong-gang, HUANG Xin, ZHANG Shu, LIN Xiong-chao. Determination of O-containing functional groups distribution in low-rank coals by chemical titration[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(2): 134-138. shu

Determination of O-containing functional groups distribution in low-rank coals by chemical titration

1.
School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

Corresponding author: WANG Yong-gang,
Received Date: 11 September 2012
Available Online: 1 December 2012
Fund Project: 国家自然科学基金(21076222)。 (21076222)

Distribution of oxygen-functional groups (carboxyl, alcohol-hydroxyl, phenol-hydroxyl, methoxyl and carbonyl) in 4 Chinese low-rank coals was evaluated based on chemical analysis. Concentration of carboxyl was quantitated by acetic acid calcium ion exchange method and the buffer (pH=8.3). The effect of analysis condition on the concentration of carboxyl and total acidity was studied. The results show that the reliable results are obtained in N₂ atmosphere other than in air. The occurrence of carboxyl in coal is carboxylate. When quantitating the concentration of phenol-hydroxyl in the acid-washing brown coal with ion exchanged method, its concentration increases with increasing pH value. Concentration of carboxyl and hydroxyl account for 34.49% and 34.79%, respectively, in the total oxygen for the dry ash free basis brown coal. Different concentrations of carbonyl exist in the low-rank coals, but that of methoxyl is little.
- low-rank coal,
- O-containing functional groups,
- occurrence,
- chemical titration
1. [1]
  [1] LI C Z, SATHE C, KERSHAW J R, PANG Y. Fates and roles of alkali and alkaline earth metals during the pyrolysis of a Victorian brown coal[J]. Fuel, 2000, 79(3/4): 427-438.
2. [2]
  [2] PORTAL J M, PILLON P, JEANSON P, GERARD B. Oxygen-containing functional groups in land-derived humic acids:l Evaluation by derivatization methods[J]. Org Geochem, 1986, 9(6): 305-311.
3. [3]
  [3] SCHAFER H N S. Determination of the total acidity of low-rank coals[J]. Fuel, 1970, 49(3): 271-280.
4. [4]
  [4] SCHAFER H N S, WORNAT M J. Determination of carboxyl groups in Yallourn brown coal [J]. Fuel, 1990, 69(11): 1456-1458.
5. [5]
  [5] SCHAFER H N S. Determination of carboxyl groups in low-rank coals[J]. Fuel, 1984, 63(5): 723-726.
6. [6]
  [6] MURATA S, HOSOKAWA M, KIDENA K, NOMURA M. Analysis of oxygen-functional groups in brown coals[J]. Fuel Process Technol, 2000, 67(3): 231-243.
7. [7]
  [7] KELEMEN S R, AFEWOK M, GORBATY M L, COHEN A D. Characterization of organically bound oxygen forms in lignites, peats, and pyrolyzed peats by X-ray photoelectron spectroscopy (XPS) and solid-state ¹³CNMR methods[J]. Energy Fuels, 2002, 16(6): 1450-1462.
8. [8]
  [8] KOZLOWSKI M. XPS study of reductively and non-reductively modified coals[J]. Fuel, 2004, 83(3): 259-265.
9. [9]
  [9] MAO J D,HU W G,SCHMIDT R K,DAVIES G,GHABBOUR E A,XING B. Quantitative characterization of humic substances by solid-state carbon-13 nuclear magnetic resonance[J]. Soil Sci Soc Am J, 2000, 64(3): 873-884.
10. [10]
  [10] 张蓬洲, 李丽云, 叶朝辉. 用固体高分辨核磁共振研究煤结构[J]. 燃料化学学报, 1993, 21(3): 310- 316. (ZHANG Peng-zhou, LI Li-yun, YE Chao-hui. Solid state ¹³C-NMR study of Chinese coals[J]. Journal of Fuel Chemistry and Technology, 1993, 21(3): 310- 316.)
11. [11]
  [11] 罗陨飞, 李文华, 陈亚飞. 中低变质程度煤显微组分结构的 ¹³C-NMR 研究[J]. 燃料化学学报, 2005, 33( 5): 540- 543. ( LUO Yun- fei, LI Wen- hua, CHEN Ya- fei. ¹³C- NMR analysis on different macerals of several low- to medium-rank coals[J]. Journal of Fuel Chemistry and Technology, 2005, 33(5): 540- 543.)
12. [12]
  [12] 贾建波, 曾凡桂, 孙蓓蕾. 神东2-2煤镜质组大分子结构模型 ¹³C- NMR 谱的构建与修[J]. 燃料化学学报, 2011, 39(9): 652-656. (JIA Jian- bo, ZENG Fan- gui, SUN Bei- lei.Construction and modification of macromolecular structure model for vitrinite from Shendong 2-2 coal[J]. Journal of Fuel Chemistry and Technology, 2011, 39(9): 652-656.)
13. [13]
  [13] 王丽, 张蓬洲, 郑敏. 用固体核磁共振和电子能谱研究我国高硫煤的结构[J]. 燃料化学学报, 1996, 24( 6): 539- 543. ( WANG Li, ZHANG Peng- zhou, ZHENG Min. Study on structural characterization of three Chinese coals of high organic sulphur content using XPS and solid-state NMR spectroscopy[J].Journal of Fuel Chemistry and Technology, 1996, 24(6): 539-543.)
14. [14]
  [14] HAYASHI J I, TAKAHASHI H, DOI S, KUMAGAI H, CHIBA T. Reactions in brown coal pyrolysis responsible for heating rate effect on tar yield[J]. Energy Fuels, 2000, 14(2): 400-408.
15. [15]
  [15] ALLARDIC D J, CLEMOW L M, JACKSON W R. Determination of the acid distribution and total acidity of low-rank coals and coal-derived materials by an improved barium exchange technique[J]. Fuel, 2003, 82(1): 35-40.
16. [16]
  [16] USP29–NF24Page 2575, Methoxy determination[S].
17. [17]
  [17] 郭崇涛. 煤化学[M]. 北京: 化学工业出版社, 1999. ( GUO Chong-tao. Coal chemistry[M].Beijing: Chemical Industry Press, 1999.)
18. [18]
  [18] GB/T 19227—2008, 煤中氮的测定方法[S]. (GB/T 19227—2008, Method for the determination of nitrogen in coal[S].)
19. [19]
  [19] KIM Y S, YANG S J, KIM S W, LIM H J, KIM T, PARK C R.Critical revisit to Boehm titration method for CNT surface characterization//2011, Annual World Conference on Carbon 2011: 580-581.
1. [1]
  Juan Hou , Chen Zhou , Jing Sun . Teaching Design of the Classical Analytical Chemistry Content Based on Logical and Innovative Thinking: A Case Study of the Application of Acid-Base Titration Method. University Chemistry, 2024, 39(4): 221-226. doi: 10.3866/PKU.DXHX202310023
2. [2]
  Xinyu Zhu , Meili Pang . Application of Functional Group Addition Strategy in Organic Synthesis. University Chemistry, 2024, 39(3): 218-230. doi: 10.3866/PKU.DXHX202308106
3. [3]
  Danqing Wu , Jiajun Liu , Tianyu Li , Dazhen Xu , Zhiwei Miao . Research Progress on the Simultaneous Construction of C—O and C—X Bonds via 1,2-Difunctionalization of Olefins through Radical Pathways. University Chemistry, 2024, 39(11): 146-157. doi: 10.12461/PKU.DXHX202403087
4. [4]
  Jie ZHAO , Huili ZHANG , Xiaoqing LU , Zhaojie WANG . Theoretical calculations of CO₂ capture and separation by functional groups modified 2D covalent organic framework. Chinese Journal of Inorganic Chemistry, 2025, 41(2): 275-283. doi: 10.11862/CJIC.20240213
5. [5]
  Tingting Jiang , Jing Chang . Application of Ideological and Political Education in Chemical Analysis Experiment under the Background of Emerging Engineering Education: Taking the Redox Titration Experiment as an Example. University Chemistry, 2024, 39(2): 168-174. doi: 10.3866/PKU.DXHX202308007
6. [6]
  Na Li , Limin Shao . Deduction of the General Formula of the Inverse Function of the Titration Curve. University Chemistry, 2025, 40(3): 390-401. doi: 10.12461/PKU.DXHX202409134
7. [7]
  Xiaoning TANG , Shu XIA , Jie LEI , Xingfu YANG , Qiuyang LUO , Junnan LIU , An XUE . Fluorine-doped MnO₂ with oxygen vacancy for stabilizing Zn-ion batteries. Chinese Journal of Inorganic Chemistry, 2024, 40(9): 1671-1678. doi: 10.11862/CJIC.20240149
8. [8]
  Huan LI , Shengyan WANG , Long Zhang , Yue CAO , Xiaohan YANG , Ziliang WANG , Wenjuan ZHU , Wenlei ZHU , Yang ZHOU . Growth mechanisms and application potentials of magic-size clusters of groups Ⅱ-Ⅵ semiconductors. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1425-1441. doi: 10.11862/CJIC.20240088
9. [9]
  Hui Shi , Shuangyan Huan , Yuzhi Wang . Ideological and Political Design of Potassium Permanganate Oxidation-Reduction Titration Experiment. University Chemistry, 2024, 39(2): 175-180. doi: 10.3866/PKU.DXHX202308042
10. [10]
  Tiejun Su . The Construction and Application of the Calculation Formula for Endpoint Error in Precipitation Titration: A Case Study of the Mohr Method. University Chemistry, 2024, 39(11): 384-387. doi: 10.12461/PKU.DXHX202402039
11. [11]
  Fugui XI , Du LI , Zhourui YAN , Hui WANG , Junyu XIANG , Zhiyun DONG . Functionalized zirconium metal-organic frameworks for the removal of tetracycline from water. Chinese Journal of Inorganic Chemistry, 2025, 41(4): 683-694. doi: 10.11862/CJIC.20240291
12. [12]
  Lubing Qin , Fang Sun , Meiyin Li , Hao Fan , Likai Wang , Qing Tang , Chundong Wang , Zhenghua Tang . 原子精确的(AgPd)₂₇团簇用于硝酸盐电还原制氨：一种配体诱导策略来调控金属核. Acta Physico-Chimica Sinica, 2025, 41(1): 2403008-. doi: 10.3866/PKU.WHXB202403008
13. [13]
  Hong RAO , Yang HU , Yicong MA , Chunxin LÜ , Wei ZHONG , Lihua DU . Synthesis and in vitro anticancer activity of phenanthroline-functionalized nitrogen heterocyclic carbene homo- and heterobimetallic silver/gold complexes. Chinese Journal of Inorganic Chemistry, 2024, 40(12): 2429-2437. doi: 10.11862/CJIC.20240275
14. [14]
  Limin Shao , Na Li . A Unified Equation Derived from the Charge Balance Equation for Constructing Acid-Base Titration Curve and Calculating Endpoint Error. University Chemistry, 2024, 39(11): 365-373. doi: 10.3866/PKU.DXHX202401086
15. [15]
  Juan Yang . Construction of General Chemistry Course in the Chemistry “101 Plan”. University Chemistry, 2024, 39(10): 8-13. doi: 10.12461/PKU.DXHX202408026
16. [16]
  Hongyan Chen , Yajun Hou , Shui Hu , Zhuoxun Wei , Fang Zhu , Chengyong Su . Construction of Synthetic Chemistry Experiment of the Chemistry “101 Plan”. University Chemistry, 2024, 39(10): 58-63. doi: 10.12461/PKU.DXHX202409109
17. [17]
  Hong Yan , Wenfeng Wang , Keyin Ye , Yaofeng Yuan . Organic Electrochemistry and Its Integration into Chemistry Teaching. University Chemistry, 2025, 40(5): 301-310. doi: 10.12461/PKU.DXHX202407027
18. [18]
  Yutao Lu , Jing Wu . Rebirth from the Flames: Unveiling the “Chemical Secrets” of Fire Smoke. University Chemistry, 2024, 39(9): 208-213. doi: 10.12461/PKU.DXHX202401001
19. [19]
  Liangzhen Hu , Li Ni , Ziyi Liu , Xiaohui Zhang , Bo Qin , Yan Xiong . A Green Chemistry Experiment on Electrochemical Synthesis of Benzophenone. University Chemistry, 2024, 39(6): 350-356. doi: 10.3866/PKU.DXHX202312001
20. [20]
  Dongcheng Liu , Xiaokun Li , Huancheng Hu , Cunji Gao , Qiong Hu , Shuting Li , Yuning Liang . Chemistry Experimental Teaching Reform for the Promotion of Training Exceptional Chemistry Teachers for Normal Schools. University Chemistry, 2024, 39(8): 1-6. doi: 10.3866/PKU.DXHX202311072

Get Citation

PDF

XML

Metrics

PDF Downloads(664)
Abstract views(2760)
HTML views(244)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142