In-situ analysis of catalytic pyrolysis of Baiyinhua coal with pyrolysis time- of-flight mass spectrometry

Shi Zhiwei; Jin Lijun; Zhou Yang; Li Heng; Li Yang; Hu Haoquan

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In-situ analysis of catalytic pyrolysis of Baiyinhua coal with pyrolysis time- of-flight mass spectrometry

机译：热解飞行时间质谱法原位分析白银花煤的催化热解

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Baiyinhua coal was subjected to catalytic pyrolysis over HZSM-5 and Ni-modified HZSM-5 (Ni/HZSM-5) with a novel pyrolysis time-of-flight mass spectrometers (Py-TOF-MS) equipped with vacuum ultraviolet photoionizafion (VUVPI). The soft ionization of VUVPI allowed the detection of volatile organic compounds. The effect of HZSM-5 and Ni/HZSM-5 on distribution of coal pyrolysis products was online investigated. The coal pyrolysis products including alkanes, phenols, aromatics and sulfur containing compounds (H2S and CH3SH) were detected. In the presence of HZSM-5 and Ni/HZSM-5, the products from coal pyrolysis have higher content of substituted benzene and alkenes and lower content of phenols in comparison with that without catalyst. The catalysts promote the conversion of phenols products to aromatic hydrocarbons via dehydroxylation reaction. Ni/HZSM-5 exhibits better catalytic performance for generating products with higher aromatic content and less oxygen species than HZSM-5 alone. Temperature-evolved profiles of pyrolysis products were also measured. It was found that the peak temperature of alkenes and substituted benzene of catalytic pyrolysis shifts to lower temperature region while that of dihydroxybenzenes moves to higher temperature. This work demonstrates the good performance of Py-TOF-MS for the online study of the coal catalytic pyrolysis process.

机译：使用装有真空紫外光电离（VUVPI）的新型热解飞行时间质谱仪（Py-TOF-MS），将白银华煤在HZSM-5和Ni修饰的HZSM-5（Ni / HZSM-5）上进行了催化热解。）。 VUVPI的软电离允许检测挥发性有机化合物。在线研究了HZSM-5和Ni / HZSM-5对煤热解产物分布的影响。检测到煤热解产物，包括烷烃，酚，芳烃和含硫化合物（H2S和CH3SH）。与没有催化剂的情况相比，在HZSM-5和Ni / HZSM-5的存在下，煤热解产物的取代苯和烯烃含量较高，酚含量较低。催化剂通过脱羟基反应促进酚类产物向芳族烃的转化。 Ni / HZSM-5与单独的HZSM-5相比，在生成具有更高芳族含量和更少氧种类的产品方面表现出更好的催化性能。还测量了热解产物的温度变化曲线。发现催化热解的烯烃和取代苯的峰值温度移至较低温度区域，而二羟基苯的峰值温度移至较高温度。这项工作证明了Py-TOF-MS在煤炭催化热解过程在线研究中的良好性能。

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来源
《Fuel》 |2018年第1期|386-393|共8页
作者
Shi Zhiwei; Jin Lijun; Zhou Yang; Li Heng; Li Yang; Hu Haoquan;
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作者单位

Dalian Univ Technol, Inst Coal Chem Engn, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China;

Dalian Univ Technol, Inst Coal Chem Engn, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China;

Dalian Univ Technol, Inst Coal Chem Engn, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China;

Dalian Univ Technol, Inst Coal Chem Engn, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China;

Dalian Univ Technol, Inst Coal Chem Engn, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China;

Dalian Univ Technol, Inst Coal Chem Engn, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Coal catalytic pyrolysis; HZSM-5; Ni; Py-TOF-MS;

机译：煤催化热解;HZSM-5;镍;Py-TOF-MS;

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In-situ analysis of catalytic pyrolysis of Baiyinhua coal with pyrolysis time- of-flight mass spectrometry

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