<p>Novel insights into the mechanism for protic solvent promoting Pd/C-catalyzed hydrodechlorination of chlorinated organic compounds</p>

doi:10.1016/j.cej.2021.133729

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Novel insights into the mechanism for protic solvent promoting Pd/C-catalyzed hydrodechlorination of chlorinated organic compounds
	Ma, Xuanxuan 1,3; Ma, Yunbo 3; Su, Heng 3; Liu, Sujing 3; Liu, Ying 3; Li, Qing 2; Xia, Chuanhai 3
刊名	CHEMICAL ENGINEERING JOURNAL
	2022-03-01
卷号	431 页码:10
关键词	Mechanism Solvent effects hydrodechlorination (HDC) Hydrogenation Pd/C
ISSN号	1385-8947
DOI	10.1016/j.cej.2021.133729
通讯作者	Xia, Chuanhai(chxia_ldu@163.com)
英文摘要	Solvent effects in liquid-phase hydrodechlorination (HDC) of chlorinated organic compounds (COCs) over Pd/C catalyst were systematically studied. For the HDC of 4-chlorobiphenyl (4-CBP) with triethylamine (Et3N), Pd/C exhibited much higher catalytic activity in protic solvents than that in aprotic polar and non-polar solvents, and a clear correlation between the HDC rate and polarity of protic solvents was observed. Moreover, water promoted Pd/C-catalyzed HDC of 4-CBP in homogeneous alcohol-water solvents and biphasic organic-water solvents with Et3N, and the HDC rate of 4-CBP increased with the increase of water content in the above solvent systems. Catalyst characterization (FT-IR and XRD) combined with solvent parameters and isotope labelling analysis were introduced to explain in-depth the solvent effects in the HDC of 4-CBP with Et3N. It was found that protic solvents would transfer active hydrogen atom (H) via hydrogen bonding network or exchange their hydroxyl hydrogen with H, which was beneficial to the stabilization of H* and interface HDC reaction. Thus, the higher HDC rate was achieved in solvent systems contained protic solvents with higher hydrogen-bond donor capability (alpha) values. On the other hand, non-polar and polar aprotic solvents had a negative effect on H* and mass transfer, and thus suppressed interface HDC reaction. Similar solvent effects were observed in Pd/C-catalyzed hydrogenation of unsaturated bonds-containing groups (nitryl group, carbonyl group, and carbon-carbon double bond). The results presented here would provide vital guidance for the rational selection of solvent systems for Pd/Ccatalyzed HDC of COCs and hydrogenation of unsaturated bonds-containing groups.
WOS关键词	ELECTROCATALYTIC HYDRODECHLORINATION ; PHASE HYDRODECHLORINATION ; WATER ; CHLOROPHENOLS ; NI ; HYDRODEHALOGENATION ; 2,4-DICHLOROPHENOL ; DECHLORINATION ; HYDROGENATION ; CONTAMINANTS
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000770869500002
资助机构	Natural Science Foundation of Shandong Province of China ; National Natural Science Foundation of China ; Yantai Key Research and Development Plan
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/31393]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
通讯作者	Xia, Chuanhai
作者单位	1.Longyan Univ, Fujian Prov Coll & Univ Engn Res Ctr Solid Waste, Longyan 364012, Peoples R China 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Biol & Bioresource Utilizat, Yantai 264003, Peoples R China 3.Ludong Univ, Sch Resources & Environm Engn, Yantai 264025, Peoples R China
推荐引用方式 GB/T 7714	Ma, Xuanxuan,Ma, Yunbo,Su, Heng,et al. Novel insights into the mechanism for protic solvent promoting Pd/C-catalyzed hydrodechlorination of chlorinated organic compounds [J]. CHEMICAL ENGINEERING JOURNAL,2022,431:10.
APA	Ma, Xuanxuan.,Ma, Yunbo.,Su, Heng.,Liu, Sujing.,Liu, Ying.,...&Xia, Chuanhai.(2022). Novel insights into the mechanism for protic solvent promoting Pd/C-catalyzed hydrodechlorination of chlorinated organic compounds .CHEMICAL ENGINEERING JOURNAL,431,10.
MLA	Ma, Xuanxuan,et al." Novel insights into the mechanism for protic solvent promoting Pd/C-catalyzed hydrodechlorination of chlorinated organic compounds ".CHEMICAL ENGINEERING JOURNAL 431(2022):10.