文章摘要
丁军委.中孔碳负载Pt催化剂用于抗氧剂7PPD合成反应[J].精细化工,2019,36(4):
中孔碳负载Pt催化剂用于抗氧剂7PPD合成反应
Synthesis of Rubber Antioxidant 7PPD by Pt-S/C Catalyst
投稿时间:2018-08-27  修订日期:2018-12-05
DOI:
中文关键词: 中孔碳  Pt/MC催化剂  孔结构  抗氧剂7PPD  降活原因
英文关键词: mesoporous carbon  Pt/MC catalyst  pore structure  antioxidant 7PPD
基金项目:山东省自然科学基金重大基础研究项目(ZR2017ZC0630)
作者单位E-mail
丁军委 青岛科技大学 767003268@qq.com 
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中文摘要:
      以纳米氧化锌为模板剂,酚醛树脂为碳源,通过硬模板法制备了中孔碳,并以其为载体制备了Pt/MC催化剂,通过BET、SEM、ICP、TEM等表征手段对中孔碳及其负载的Pt/MC催化剂进行表征。结果表明,可以通过模板剂有效调控中孔碳的比表面积和孔结构。将制备的Pt/MC催化剂用于抗氧剂7PPD合成反应,对比普通Pt/AC催化剂,p-ADPA的转化率由97.5%提高至100%,7PPD选择性由94.5%提高至99.5%,催化剂的稳定性明显提高。通过CO化学吸附、ICP、BET等对新鲜和使用十次后的催化剂进行表征,结果表明,催化剂载体的孔结构是影响催化剂稳定性的重要因素,平均孔径较小时,7PPD等大分子尺寸的分子容易堵塞孔道;平均孔径较大时,孔壁较薄,催化剂使用过程中容易磨损,活性组分流失。
英文摘要:
      The nano-zinc oxide was used as the template and the phenolic resin was used as the carbon source. The mesoporous carbon was prepared by a hard template method and used as support for the preparation of Pt-based catalysts. BET, SEM, ICP, TEM were used to characterize the mesoporous carbon and its supported Pt catalysts. The results show that surface area and pore structure of mesoporous carbon can be effectively controlled by varying the size of the nano-zinc oxide particles. The Pt/MC catalytic performance for the antioxidant 7PPD synthesis reaction was studied. Compared with the conventional Pt/AC catalyst, the conversion of p-ADPA reached to 100% from 97.5% and the selectivity of 7PPD reached 99.5% from 94.5% and the stability of the catalysts were significantly improved. The catalysts used ten times were characterized by CO chemisorption, ICP, BET, etc. The results show that the pore structure of the support is an important factor affecting the stability of the catalyst. When the average pore diameter is small, molecules with large molecular sizes such as 7PPD was easy to block the pores. When the average pore diameter is largest, the pore walls are thinner, the catalyst was worn easily during use, and the active components were lost easily.
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