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Ni/SiO2在甲烷部分氧化反应中的稳定性:W修饰的影响
Authors
万惠霖
夏文生
+5 more
李倩倩
王雅莉
翁维正
赵明全
连孟水
Publication date
15 June 2019
Publisher
Abstract
甲烷部分氧化制合成气反应(POM)是天然气、页岩气资源利用的重要途径之一,常用的Ni/SiO2催化剂在反应中易发生表面积炭而失活。为了解决这一问题,我们采用尿素沉淀法制备W修饰的Ni基催化剂,并考察其在POM反应中的稳定性和W的作用。结果表明,催化剂中适量W的存在可显著改善其POM反应稳定性。其原因为Ni-W作用修饰了Ni的化学态或其亲氧能力,从而改善了其表面抗积炭能力。此外,反应中催化剂表面形成的α-WC具有一定的抑制表面积炭形成的能力,且该α-WC具有良好的稳定性。国家自然科学基金(21373169);;\n教育部创新团队(IRT1036)资助项目~
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Last time updated on 20/11/2020