| 一种无定形有序的Ce-Ti催化膜用于同时去除粉尘和氮氧化物 |
| Ordered Mesoporous and Complete Amorphous Ce-Ti Catalytic Filter for Particle Separation and NOx Removal |
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| 摘要: 通过模板法改进的溶胶凝胶法制备出有序无定形的Ce-Ti催化膜，用于同时去除粉尘和氮氧化物。结果表明，通过引入Ce元素，抑制了TiO2的晶型结构，加固了TiO2孔道骨架结构，使其在煅烧过程中能够保留长程有序的六方孔道结构。Ce0.2TiOx催化剂展现出最优的催化性能，在175~350℃时氮氧化物转化率几乎为100%，同时也表现出较好的耐SO2性。这主要是因为Ce0.2TiOx催化剂保留了有序孔道的较大比表面积，同时形成了Ce-O-Ti键。Ce0.2TiOx催化剂涂覆在撑体孔道表面，增加了膜过滤压降。经过2次涂覆后，催化膜选择性催化还原（SCR）NOx性能与粉末催化剂几乎一致。 |
| 关键词: 催化膜 选择性催化还原 有序孔结构 除尘 Ce-Ti催化剂 |
| 基金项目: 江苏省自然科学基金（No.BK20160297）资助项目。 |
| Abstract: A complete amorphous and highly ordered Ce-Ti catalytic membrane was prepared for simultaneously removing the particulates and NOx. Results showed that the presence of Ce species suppressed the phase transformation of the anatase TiO2, consolidated the pore framework and well retained the ordered hexagonal pore structure. As a result, the highly ordered Ce0.2TiOx catalyst presented approximately 100% NO conversion in a wide temperature of 175~350℃ and satisfactory SO2 tolerance because of large surface and formation of the Ce-O-Ti species. Furthermore, the prepared Ce0.2TiOx catalytic membrane slightly enhanced the operating pressure drop and delivered an almost similar selective catalytic reduction (SCR) activity for NOx with the catalyst powder. |
| Keywords: catalytic membrane selective catalytic reduction ordered pore strcture dust removal Ce-Ti catalyst |
| 投稿时间：2020-04-13 修订日期：2020-09-15 |
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| 李丹,王慧,陈留平,朱娜.一种无定形有序的Ce-Ti催化膜用于同时去除粉尘和氮氧化物[J].无机化学学报,2020,36(11):2189-2196. |
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