顺酐加氢Pd/C催化剂失活原因的研究
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摘要
对液相顺酐加氢生产丁二酸过程中Pd/C催化剂失活进行了分析研究,旨在找出催化剂失活的真正原因。从催化剂表征和工艺技术两个方面考虑,采用N2-吸附、XRD、TEM/TSM、TG、金属含量、FT-IR等多种分析手段,对催化剂使用前后的状态进行了测定与表征,使用后的催化剂活性组分流失严重。结合红外谱图的分析,认为该反应的产物丁二酸与催化剂中的Pd的络合是导致活性组分流失的主要原因。
Pd/C catalyst deactivation in the liquid-phase hydrogenation of maleic anhydride to succinic acid was investigated to determine the cause of the deactivation. Considering all aspects of the reaction and relevant characterization techniques, we adopted a suite of analytical methods, such as N2 adsorption, XRD, TEM/TSM, TG,metal content analysis, and FT-IR, for the characterization of the catalyst before and after use. We observed a severe loss of active catalyst in the used samples. Based on the combined characterization results, it was deduced that complex formation between the Pd of the catalyst and the succinic acid produced through the hydrogenation was the main reason for the active component loss of catalyst.
Pd/C catalyst deactivation in the liquid-phase hydrogenation of maleic anhydride to succinic acid was investigated to determine the cause of the deactivation. Considering all aspects of the reaction and relevant characterization techniques, we adopted a suite of analytical methods, such as N2 adsorption, XRD, TEM/TSM, TG,metal content analysis, and FT-IR, for the characterization of the catalyst before and after use. We observed a severe loss of active catalyst in the used samples. Based on the combined characterization results, it was deduced that complex formation between the Pd of the catalyst and the succinic acid produced through the hydrogenation was the main reason for the active component loss of catalyst.
引文
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[2]Werpy T, Petersen G, Aden A, et al. Top value added chemichals from biomass.Volume 1:results of screening for potential candidates from sugars and synthesis gas[R]. Richland Washington; Pacific Northwest National Laboratory, 2004
[3]韩艳辉,胡慧敏,张伟,李凯.丁二酸生产技术研究进展[J].山西化工, 2017, 37(3):38-40.
[4]李云舟,吴文娟,张文祥,等.顺酐加氢制备丁二酸酐催化剂的研究进展[J].化学通报,2015,78(2):119-124
[5]Satterfield C N. Heterogeneous Catalysis in Industrial Practice[M]. 2nd ed. NY:McGraw2Hill, 1991:201.
[6]Valeria Bertani, Carlo Cavallotti, Maurizio Masi, et al.[J].Journal of Molecular Catalysis A:Chemical 2003, 204-205:771.
[7]陈建兵;廖克俭;佟明等.顺酐加氢制备丁二酸酐的研究[J].石油化工高等学校学报.2010,23(4):29-32.
[8]吕清林.一种顺酐加氢制备丁二酸酐的催化剂及其制备方法和应用:中国,CN103769105A[P]. 2014.
[9]化工百科全书编辑委员会.化工百科全书[M].北京:化学工业出版社,1997.15:723.
[10]J R安德森, K C普拉特.催化剂表征与测试[M].北京:烃加工出版社, 1985:106.
[11]Nalini Krishnankutty, M Alber t.[J]. Journal o f catalysis,1995,(155):312.