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

doi:10.1016/j.cej.2021.133729

	Novel insights into the mechanism for protic solvent promoting Pd/C-catalyzed hydrodechlorination of chlorinated organic compounds
	Ma, Xuanxuan 1,3; Ma, Yunbo 1; Su, Heng 1; Liu, Sujing 1; Liu, Ying 1; Li, Qing2 ; Xia, Chuanhai1
发表期刊	CHEMICAL ENGINEERING JOURNAL
ISSN	1385-8947
	2022-03-01
卷号	431 页码:10
关键词	Mechanism Solvent effects hydrodechlorination (HDC) Hydrogenation Pd/C
DOI	10.1016/j.cej.2021.133729
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.
收录类别	SCI
语种	英语
关键词[WOS]	ELECTROCATALYTIC HYDRODECHLORINATION ; PHASE HYDRODECHLORINATION ; WATER ; CHLOROPHENOLS ; NI ; HYDRODEHALOGENATION ; 2,4-DICHLOROPHENOL ; DECHLORINATION ; HYDROGENATION ; CONTAMINANTS
研究领域[WOS]	Engineering
WOS记录号	WOS:000770869500002
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/31394
专题	中国科学院海岸带环境过程与生态修复重点实验室海岸带生物学与生物资源利用重点实验室_海岸带生物学与生物资源保护实验室
通讯作者	Xia, Chuanhai
作者单位	1.Ludong Univ, Sch Resources & Environm Engn, Yantai 264025, Peoples R China 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Biol & Bioresource Utilizat, Yantai 264003, Peoples R China 3.Longyan Univ, Fujian Prov Coll & Univ Engn Res Ctr Solid Waste, Longyan 364012, 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.