Pyrolysis of Yulin coal over ZSM-22 supported catalysts for upgrading coal tar in fixed bed reactor
Pyrolysis of Yulin coal over ZSM-22 supported catalysts for upgrading coal tar in fixed bed reactor
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ZSM-22负载型固定床反应器热解榆林煤提质煤焦油
DOI：
10.1016/j.jaap.2017.05.004
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发表时间：
2017-07
影响因子：
6
通讯作者：
Shuang Li
中科院分区：
文献类型：
--
作者：
Qing Li;Xiuyan Feng;Xiao Wang;Tongtong Wu;Bo Chen;Yanyan Zhu;Shuang Li
在固定床反应器中对榆林煤（YLC）进行了ZSM-22负载型催化剂的催化热解反应，并对热解产物进行了气相色谱/质谱（GC/MS）分析。采用X射线衍射（XRD）、比表面积（BET）、透射电镜（TEM）、扫描电镜-能谱（SEM-EDS）和氨程序升温脱附（NH3-TPD）等方法对ZSM-22和ZSM-22负载CoOX、MoO 3和CoOX-MoO 3催化剂进行了表征。结果表明，ZSM-22及其金属氧化物/ZSM-22（MOs/ZSM-22）催化剂具有较高的焦油产率，而较低的焦炭产率。更重要的是，可以通过调节催化剂的酸中心类型来控制焦油的产率和分布。所有催化剂均能显著提高芳烃、酚类和芳香族化合物的相对含量，而抑制醇类和含氮化合物的相对含量。结果表明，MoO 3/ZSM-22催化剂具有较好的酚类生成能力，CoOX/ZSM-22催化剂具有较高的芳烃和芳烃选择性（分别为21.01%和49.50%），而CoOX-MoO 3/ZSM-22催化剂具有较好的煤油生成能力（分别为13.75%和13.75%）。
In the present study, catalytic pyrolysis of Yulin coal (YLC) using ZSM-22-supported catalysts was performed in a fixed-bed reactor and the resulting liquid products were determined with gas chromatography/mass spectrometer (GC/MS). The zeolite ZSM-22 and ZSM-22-supported CoOX, MoO3and CoOX-MoO3catalysts were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), transmission electron microscope (TEM), scanning electron microscope-energy dispersive X-ray spectrometry (SEM-EDS) and temperature-programmed desorption of NH3(NH3-TPD). The results showed that ZSM-22 and its metal oxides/ZSM-22 (MOs/ZSM-22) catalysts result in a higher tar yield, whereas lower char yield is produced. More importantly, the yield and distribution of tar could be controlled by tuning the type of acid sites of the catalysts. All catalysts significantly selectively improved the relative contents of aliphatics, arenes and phenols, whereas inhibited those of alcohols and nitrogen-containing compounds. Among those catalysts, MoO3/ZSM-22 was found to be more effective in producing phenols, and CoOX/ZSM-22 showed better performance in upgrading tar quality in terms of high selectivity for aliphatics (49.50%) and arenes (21.01%), while CoOX-MoO3/ZSM-22 favored to produce kerosene (13.75%).
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