当前位置: X-MOL 学术J. Chem. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Highly efficient hydrotalcite supported palladium catalyst for hydrodechlorination of 1, 2, 4-tri chlorobenzene: Influence of Pd loading
Journal of Chemical Sciences ( IF 1.7 ) Pub Date : 2020-02-13 , DOI: 10.1007/s12039-020-1743-1
Arshid M Ali , Seetharamulu Podila , Muhammad A Daous , Abdulrahim A Al-Zahrani , Aishah Mahpudz

Abstract

The influence of Pd loading was studied for the gas phase catalytic hydrodechlorination of 1,2,4-trichlorobenzene over Pd supported on Mg-Al mixed oxide support with Mg:Al ratio 2:1. The Mg-Al support was prepared from hydrotalcite precursor. A series of catalysts was prepared with different loadings of Pd (1–6 wt%) on Mg-Al mixed oxide support. The performance of catalytic material was evaluated at different temperatures ranging from 425–575K. The fresh and used catalysts were characterized with different analytical techniques such as BET surface area, X-ray diffraction studies, Temperature programmed reduction, X-ray photoelectron spectroscopy and CO-chemisorption studies. H2-Temperature programmed desorption studies was also performed to understand the metal-support interaction and suitable active sites. The 4wt% of Pd on Mg-Al mixed oxide catalyst showed the highest conversion and selectivity among all catalysts and maintained steady activity with 10 h of time-on-stream studies. The main reasons for high activity are suitable metal-support interactions, Pd particle size, high surface area, and high surface Pd atomic concentration.

Graphic abstract

The influence of Pd loading was studied for gas phase catalytic hydrodechlorination of 1,2,4-trichlorobenzene over Pd supported on Mg-Al mixed oxide support with Mg:Al ratio 2:1. The different Pd-loadings in catalyst was studied for hydrodechlorination. The 4wt% of Pd on Mg-Al mixed oxide catalyst showed the highest performance among all the catalysts.



中文翻译:

高效水滑石负载钯催化剂对1,2,4-三氯苯的加氢脱氯:Pd负载的影响

摘要

研究了Pd负载量对Mg-Al比为2:1的Mg-Al混合氧化物载体上负载的Pd上1,2,4-三氯苯气相催化加氢脱氯的影响。由水滑石前体制备Mg-Al载体。制备了一系列在Mg-Al混合氧化物载体上负载不同Pd(1-6 wt%)的催化剂。在425–575K的不同温度下评估了催化材料的性能。使用不同的分析技术(例如BET表面积,X射线衍射研究,程序升温还原,X射线光电子能谱和CO化学吸附研究)对新鲜和使用过的催化剂进行了表征。高2-还进行了温度程序解吸研究,以了解金属-载体相互作用和合适的活性位点。Mg-Al混合氧化物催化剂上Pd的4wt%在所有催化剂中显示出最高的转化率和选择性,并在10小时的运行时间研究中保持稳定的活性。高活性的主要原因是合适的金属-载体相互作用,Pd粒径,高表面积和高表面Pd原子浓度。

图形摘要

研究了Pd负载对1,2,4-三氯苯在Mg:Al比为2:1的Mg-Al混合氧化物载体上负载的Pd进行气相催化加氢脱氯的影响。研究了催化剂中不同的Pd负载量用于加氢脱氯。在所有催化剂中,Mg-Al混合氧化物催化剂上Pd的4wt%表现出最高的性能。

更新日期:2020-03-22
down
wechat
bug