1
|
Huang Q, Zheng H, Wang X, Fu Q, Gong T, Liu C, Ma H, Ye L, Duan X, Yuan Y. Construction of Oxygen Vacancy-Rich TiO 2 Nanocrystals for Boosting the Ammonolysis of Caprolactam to 6-Aminocapronitrile. ACS APPLIED MATERIALS & INTERFACES 2024; 16:13806-13814. [PMID: 38466904 DOI: 10.1021/acsami.3c19591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Hexamethylene diamine, an important chemical intermediate for polyamides, can be synthesized through the two-step route of caprolactam (CPL) ammonolysis to 6-aminocapronitrile (ACN), followed by hydrogenation. This method has received increasing attention from academia and industry. However, studies on the catalyst structure-performance correlation in CPL ammonolysis are still sporadic. In this work, a series of anatase TiO2 with different oxygen vacancy concentrations was prepared by chemical reduction using NaBH4. The oxygen vacancy on TiO2 surface, presented as Ti3+ sites, substantially enhances the adsorption and activation of NH3, which are demonstrated as the key steps in ammonolysis. Owing to the synergistic effect of Ti3+ and Ti4+ species, the CPL conversion rate and ACN selectivity of 85 and 97%, respectively, are achieved within 250 h. Density functional theory calculations showed that the intermediates on oxygen vacancy-rich TiO2 had a more favorable adsorption energy compared to those on intact TiO2, which is in good agreement with the experimental results.
Collapse
Affiliation(s)
- Qihui Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Hui Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xia Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qi Fu
- Hubei Three Gorges Laboratory, Hubei Xingfa Chemical Group Co., Ltd., Yichang 443099, China
| | - Tao Gong
- Hubei Three Gorges Laboratory, Hubei Xingfa Chemical Group Co., Ltd., Yichang 443099, China
| | - Chang Liu
- Hubei Three Gorges Laboratory, Hubei Xingfa Chemical Group Co., Ltd., Yichang 443099, China
| | - Huijuan Ma
- Hubei Three Gorges Laboratory, Hubei Xingfa Chemical Group Co., Ltd., Yichang 443099, China
| | - Linmin Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xinping Duan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Youzhu Yuan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| |
Collapse
|
2
|
Han J, Son M, Kang D. Process design and environmental analysis for catalytic production of gamma-valerolactone from Kenaf. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.12.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
3
|
Ren C, Ji G, Li X, Zhang J. Direct Synthesis of Adipic Esters and Adiponitrile via Photoassisted Cobalt‐Catalyzed Alkene Hydrodimerization. Chemistry 2022; 28:e202201442. [DOI: 10.1002/chem.202201442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Cheng Ren
- The Institute for Advanced Studies Wuhan University 299 Bayi Rd 430072 Wuhan P. R. China
| | - Guanghao Ji
- The Institute for Advanced Studies Wuhan University 299 Bayi Rd 430072 Wuhan P. R. China
| | - Xiankai Li
- The Institute for Advanced Studies Wuhan University 299 Bayi Rd 430072 Wuhan P. R. China
| | - Jing Zhang
- The Institute for Advanced Studies Wuhan University 299 Bayi Rd 430072 Wuhan P. R. China
| |
Collapse
|
4
|
Wu X, Galkin MV, Stern T, Sun Z, Barta K. Fully lignocellulose-based PET analogues for the circular economy. Nat Commun 2022; 13:3376. [PMID: 35697677 PMCID: PMC9192716 DOI: 10.1038/s41467-022-30735-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 05/10/2022] [Indexed: 11/29/2022] Open
Abstract
Polyethylene terephthalate is one of the most abundantly used polymers, but also a significant pollutant in oceans. Due to growing environmental concerns, polyethylene terephthalate alternatives are highly sought after. Here we present readily recyclable polyethylene terephthalate analogues, made entirely from woody biomass. Central to the concept is a two-step noble metal free catalytic sequence (Cu20-PMO catalyzed reductive catalytic fractionation and Raney Ni mediated catalytic funneling) that allows for obtaining a single aliphatic diol 4-(3-hydroxypropyl) cyclohexan-1-ol in high isolated yield (11.7 wt% on lignin basis), as well as other product streams that are converted to fuels, achieving a total carbon yield of 29.5%. The diol 4-(3-hydroxypropyl) cyclohexan-1-ol is co-polymerized with methyl esters of terephthalic acid and furan dicarboxylic acid, both of which can be derived from the cellulose residues, to obtain polyesters with competitive Mw and thermal properties (Tg of 70–90 °C). The polymers show excellent chemical recyclability in methanol and are thus promising candidates for the circular economy. ‘Polyethylene terephthalate is a widely used polymer with a concerning environmental impact, and alternatives are now highly sought. In this article, the authors present a biorefinery strategy for constructing polyester analogues of polyethylene terephthalate from woody biomass, which are promising candidates for the circular economy.
Collapse
Affiliation(s)
- Xianyuan Wu
- Stratingh Institute for Chemistry, University of Groningen, Groningen, The Netherlands
| | - Maxim V Galkin
- Stratingh Institute for Chemistry, University of Groningen, Groningen, The Netherlands
| | - Tobias Stern
- University of Graz, Institute of Systems Sciences, Innovation and Sustainability Research, Merangasse 18/I, 8010, Graz, Austria
| | - Zhuohua Sun
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, No. 35 Tsinghua East Road Haidian District, Beijing, 100083, P. R. China.
| | - Katalin Barta
- Stratingh Institute for Chemistry, University of Groningen, Groningen, The Netherlands. .,Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28/II, 8010, Graz, Austria.
| |
Collapse
|