摘要
研究了Lurgi MTP工艺在投入工业应用后,MTP催化剂快速失活原因。采用XRD、SEM、XRF、TG、N_2-吸附/脱附和NH_3-TPD等方法对失活和再生催化剂进行表征。结果表明,MTP反应970 h后的催化剂晶体结构和形貌没有受到明显破坏,但稀释蒸汽中Na^+含量超标导致MTP催化剂酸性逐渐下降而失活;用再生和离子交换处理后,尤其用交换液循环离子交换法处理后的催化剂性能基本完全恢复,甲醇转化率在99%以上,丙烯选择性达到39.75%,双烯选择性为50.06%,适合对因Na^+中毒失活的工业MTP催化剂进行活性恢复。
The reason of deactivated MTP catalyst in Lurgi MTP technology during the first industrial applications was investigated. The deactivated and regenerated catalysts were characterized by means of XRD, SEM, XRF, TG, N2 - adsorption/desorption and NH3 -TPD. As a result, the crystal structure and morphology of the catalyst after the 970 h reaction was not significantly damag gradually decreased and inactivated. ed. In MTP reaction, Na ~ in the dilution steam caused the activate of catalyst Regeneration by the mean of ion exchange, especially using a fluid circulation ion - exchange means, the properties of the deactivated catalyst can be fully restored. The conversion of methanol was consistently above 99% and propylene selectivity greater than 39. 75%. The selectivity of ethane and propylene was about 50. 06%, which was suitable for recovering the active of deactivated industrial MTP catalyst due to in the dilution steam.
出处
《广州化工》
CAS
2013年第18期49-51,共3页
GuangZhou Chemical Industry
基金
宁夏回族自治区科技支撑计划项目(新型介微孔复合结构MTP催化剂的研究与开发和固定床甲醇制丙烯(MTP)过程研究及工艺优化)
关键词
MTP催化剂
甲醇制丙烯
失活
再生
MTP catalyst
methanol - to- propylene
coke
regeneration
