分會

第四十三分會：納米催化

摘要

形貌調(diào)控下的鈷基催化劑制備及其費托反應(yīng)性能的研究 李晨欣1，索玉鈞1, 李廣社2，白鳳華1,*，蘇海全1,* 1內(nèi)蒙古大學(xué)化學(xué)化工學(xué)院，內(nèi)蒙古，010021 2吉林大學(xué)無機(jī)合成與制備化學(xué)國家重點實驗室，吉林，130012 *Email: haiquansu@yahoo.com 合成氣（CO+H2）通過費托合成（F-T合成）催化反應(yīng)合成高級醇（HAS）是煤炭資源清潔利用的重要途徑之一。F-T合成是一種表面催化的結(jié)構(gòu)敏感型催化反應(yīng)，催化劑活性組分的粒徑與暴露晶面等納米效應(yīng)對催化活性有很大影響，所以關(guān)于催化劑構(gòu)效關(guān)系的研究仍然是學(xué)術(shù)界與工業(yè)界所面臨的挑戰(zhàn)。Co基催化劑被廣泛應(yīng)用于F-T合成，兼具性質(zhì)穩(wěn)定、不易積炭及擁有較好的碳鏈增長能力等優(yōu)點。本文以含Co的金屬有機(jī)框架(ZIF-67)作為前驅(qū)體，通過調(diào)控?zé)峤鈼l件制備了不同形貌的碳材料（餅狀、立方與十二面體）并通過添加K鹽合成了K為助劑的Co基催化劑（K-Co@NC）?？疾炝瞬煌蚊泊呋瘎┰诤铣筛呒壌挤磻?yīng)中的催化性能并探討了提高乙醇選擇性的影響因素。 關(guān)鍵詞：金屬有機(jī)框架；鈷基催化劑；費托合成 致謝 感謝國家自然科學(xué)基金21861029；無機(jī)合成與制備化學(xué)國家重點實驗室(吉林大學(xué))開放課題2019-11；內(nèi)蒙古自治區(qū)稀土材料化學(xué)與物理重點實驗室。 參考文獻(xiàn) [1] Chen, W.; Lin, T. J.; Dai, Y. Y.; An, Y. L.; Yu, F.; Zhong, L. S.; Li, S. G.; Sun, Y. H. Catalysis Today, 2018, 311, 8-22. [2] Zhang, R.; Wen, G.; Adidharma, H.; Russell, A. G.; Wang, B.; Radosz, M.; Fan, M. ACS Catal.,2017, 7, 8285?8295. [3] Chen, Y.; Li, X.; Mehar,U Nisa.; Lv, J.; Li, Z. H. Fuel, 2019, 241, 802-812. Shape-Controlled Synthesis of Cobalt-Based Catalysts for Higher Alcohol Synthesis from Syngas Chenxin Li1, Yujun Suo1, Guangshe Li2, Fenghua Bai1,*, Haiquan Su1,* College of Chemistry and Chemical Engineering, Inner Mongolia University, Inner Mongolia, 010021 State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin,130012 Higher alcohol synthesis (HAS) by catalytic hydrogenation of CO via the Fischer–Tropsch synthesis (FTS) is one of the important ways to clean utilization of coal resources. It widely accepts that FTS is a surface-catalyzed and structure-sensitive reaction. Its catalytic performance is strongly influenced by the nano-effects of the catalyst, such as the effects of the active phase, particle size, and exposed facets of the active components. Therefore, the structure-performance relationship of those catalysts for HAS is still a challenge for both academia and industry. Co-based catalysts are widely used in F-T synthesis, which has the advantages of stable properties, not easy to deposit carbon, and excellent carbon chain growth ability. Herein, K promoted cobalt catalysts (K-Co@NC) with various morphologies were synthesized by adding K salt to N-doped Co-carbon composites derived from pyrolysis of ZIF-67. The effects of the catalyst particle shape (pie, cube, and dodecahedron), on the performance of K-Co@NC catalysts for HAS, were investigated and how to improve the yield of ethanol effectively was discussed.

關(guān)鍵詞

金屬有機(jī)框架;鈷基催化劑;費托合成

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