摘要
近年来,丙烯下游产品的快速发展极大的促进了丙烯需求量的增长。通过1-丁烯自歧化反应生成丙烯可以实现低价值烯烃向高价值烯烃的转换。采用水热法制备了一系列P掺杂MCM-41为载体,并用湿法浸渍负载氧化钼的催化剂,在固定床反应器上对催化剂进行1-丁烯自歧化产丙烯反应性能评价。采用XRD、N2吸附-脱附、吡啶吸附红外光谱、H2-TPR和NH3-TPD等对催化剂进行表征。结果表明,与2%Mo/MCM-41相比,P掺杂MCM-41为载体,可以使催化剂上氧化钼物种分散程度提高,并使催化剂具有一定程度的酸性,提高了1-丁烯自歧化反应的活性和稳定性。2%Mo/5P-MCM-41具有最高的歧化活性,丁烯转化率为65.9%,丙烯收率为21.7%。
In recent years,the rapid development of propylene downstream products has greatly promoted the rapid growth of propylene demand.The conversion of low-value olefins to high-value olefins can be realized by self-metathesis reaction of 1-butene to propylene.A series of P-doped MCM-41 carriers were prepared by hydrothermal method,and the molybdenum oxide was impregnated with the wet method to get catalyst.The catalytic performance of the catalyst for 1-butene self-metathesis to propylene was evaluated in a fixed-bed reactor.The catalysts were characterized by XRD,N2 adsorption-desorption,pyridine adsorption infrared spectroscopy,H2-TPR and NH3-TPD.The results show that compared with 2%Mo/MCM-41,P-doped MCM-41 carrier can improve the dispersion of the MoOx species on the catalyst,and make the catalyst having acidity.Therefore,it improves the activity and the stability of the catalyst for 1-butene self-metathesis reaction.2%Mo/5P-MCM-41 has the highest metathesis activity,the conversion of butene is 65.9%and the yield of propylene is 21.7%.
作者
霍晓霞
柳娜
Huo Xiaoxia;Liu Na(College of Chemistry and Chemical Engineering,Xi'an University of Science and Technology,Xi'an 710054,Shaanxi,China)
出处
《工业催化》
CAS
2020年第5期33-40,共8页
Industrial Catalysis
基金
国家自然科学基金(21403164)
陕西省自然科学基金(2016JQ2016)。
