INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Danxia Lin,Shi Tu,Liang Yu,Yinuo Yuan,Ying Wu,Xin Zhou,Zhong Li,Qibin Xia
The separation of light hydrocarbons like methane, ethane, and propane is an important section of the chemical industry. Herein, we reported a novel porous metal–organic framework (MOF) Cu-IPA and investigated its CH4/C2H6/C3H8 separation performance, particularly for efficient capture of C2H6 and C3H8 at low concentrations. Cu-IPA featured 1D hexagonal channels and triangular channels decorated with extensive oxygen atoms. It showed high C2H6 and C3H8 capacities in the low-pressure region, where C3H8 uptake at 5 kPa was 1.62 mmol/g and C2H6 uptake reached 1.33 mmol/g at 10 kPa, suggesting the strong adsorption affinities toward C2H6 and C3H8. For an equimolar C2H6/CH4 mixture, Cu-IPA exhibited a considerable IAST selectivity of 40, exceeding most reported MOF adsorbents. Excellent CH4/C2H6/C3H8 separation performance for Cu-IPA can be attributed to its appropriate pore size and abundant accessible oxygens atoms in the triangular channel. The molecular simulation revealed that Cu-IPA tended to form stronger C–H···O interactions with C2H6 and C3H8 due to the higher polarizabilities, resulting in larger interaction differences between C2H6/CH4 and C3H8/CH4. Breakthrough tests also supported the excellent dynamic separation performance and recyclability of Cu-IPA.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Jia-nan Zheng,Mingjun Yang
Carbon dioxide (CO2) emission and fresh water scarcity have become two huge global issues over the last decades, and CO2 hydrate-based technology was promoted and developed to address them. This study investigated the effects of methylcyclopentane (MCP) on the hydrate formation condition and CO2 capture efficiency. Five cases and 31 cycles experiments of different MCP/water molar ratios (ranging from 0 to 0.03) in salt solution and porous media were conducted using the isochoric method. The hydrate phase equilibrium data of CO2–MCP hydrates were measured, and meanwhile the CO2 capture efficiencies were calculated. The results indicated that the rising MCP concentrations increase both the hydrate equilibrium temperature and the gas uptake. After the comparisons of the interpolated hydrate gas uptakes at uniform hydrate phase equilibrium pressure of 3 MPa among CO2–MCP, CO2–CP (cyclopentane), and CO2–C3H8 (propane) hydrates, CO2-MCP hydrates are especially suitable for CO2 capture. It should be noted that MCP is likely to form s-H hydrate with CO2 gas, but further confirmation is needed. Anyway, MCP can be thought as a potential coguest for integrated hydrate-based CO2 capture and desalination process.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Daofei Lv,Junhao Xu,Pingjun Zhou,Shi Tu,Feng Xu,Jian Yan,Hongxia Xi,Zewei Liu,Wenbing Yuan,Qiang Fu,Xin Chen,Qibin Xia
The separation of propylene and propane is an important but challenging process, primarily achieved through energy-intensive distillation technology in the petrochemical industry. Here, we reported two natural C 4 linkers based metal–organic frameworks (MIP-202 and MIP-203) for C 3 H 6 /C 3 H 8 separation. Adsorption isotherms and selectivity calculations were performed to study the adsorption performance for C 3 H 6 /C 3 H 8 separation. Results show that C 3 H 6 /C 3 H 8 uptake ratios (298 K, 100 kPa) for MIP-202 and MIP-203 are 2.34 and 7.4, respectively. C 3 H 6 /C 3 H 8 uptake ratio (303 K, 100 kPa) for MIP-203 is up to 50.0. The mechanism for enhanced separation performance of C 3 H 6 /C 3 H 8 on MIP-203 at higher temperature (303 K) was revealed by the in situ PXRD characterization. The adsorption selectivities of C 3 H 6 /C 3 H 8 on MIP-202 and MIP-203 (298 K, 100 kPa) are 8.8 and 551.4, respectively. The mechanism for the preferential adsorption of C 3 H 6 over C 3 H 8 in MIP-202 and MIP-203 was revealed by the Monte Carlo simulation. The cost of organic ligands for MIP-202 and MIP-203 was lower than that of organic ligands for those top-performance MOFs. Our work sets a new benchmark for C 3 H 6 sorbents with high adsorption selectivities.
研究领域:
化学工程
·
材料科学
·
石油化工
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chenxu Geng,Aibing Chen,Yuxiu Sun,Chenxu Zhang,Zixian Qin,Zhengqing Zhang,Zhenjie Gu,Zhihua Qiao
Membrane technology based on metal–organic framework (MOF) with molecular sieving properties is a promising alternative to energy-intensive conventional distillation for C 3 H 6 /C 3 H 8 separation. However, precisely regulating the aperture of MOF materials for industrial separation processes with low energy consumption remains a significant challenge. Herein, we introduce a post-synthetic defect exchange, using ortho -trifluoromethylbenzoic acid (o-TBA) in defective UiO-66, resulting in a mixed matrix membrane (MMM) with a C 3 H 6 /C 3 H 8 ideal selectivity of ∼ 104 and C 3 H 6 permeability of ∼ 293 Barrer, and exhibiting a C 3 H 6 /C 3 H 8 selectivity ∼ 36 with C 3 H 6 permeability of ∼ 188 Barrer for a C 3 H 6 /C 3 H 8 (50:50) mixture. Computational simulations confirm impact of o-TBA-UiO on reducing pore sizes and providing moderate propylene affinity. Static adsorption and solution-diffusion experimental results show that the o-TBA-UiO/6FDA-DAM membrane provides fast C 3 H 6 diffusion rates but retards C 3 H 8 diffusion, leading to ultrahigh C 3 H 6 /C 3 H 8 selectivity. A large-area membrane of 2400 cm 2 was prepared to promote practical applications, mainly because of the considerably enhanced affinity between o-TBA-UiO and 6FDA-DAM. At a feed pressure of 1 bar, the 1812-type membrane module exhibited a modest decline in single gas separation performance with a C 3 H 6 permeability of ∼ 175 Barrer and a C 3 H 6 /C 3 H 8 ideal selectivity of ∼ 96. Finally, a potential two-stage membrane process with low energy consumption was designed. This study provides a robust design for MOF-based MMMs with molecular sieving for energy-efficient gas separation.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Keying Wang,Yuling Ren,Jianquan Luo,Yongbing Zhuang,Shichao Feng,Yinhua Wan
The separation of light olefins from paraffins by a silver-loaded facilitated transport membrane has received wide attention in recent years. However, the undesirable instability of carriers Ag+ has consistently restricted its further application. In this work, a silver-loaded facilitated transport membrane is developed by interfacial polymerization on PDMS/PSF support. A part of Ag+ in the prepared membrane is presented as silver(I)-polyetheramine (Ag(I)-PEA) complexes that can effectively enhance the stability of Ag+. To eliminate nonselective voids and bring more carriers (Ag+), secondary aqueous phase treatment was conducted. And the effect of PEA and TMC concentrations, ratio of PEA to AgNO3, as well as secondary aqueous phase treatment on the gas transport is systematically investigated. The results show that the facilitated transport of Ag+ to C3H6 can offset the increase in diffusion resistance induced by the incremental membrane thickness and cross-linking degree as well as the additional AgCl particles on the membrane. Finally, the optimum C3H6/C3H8 selectivity of the silver-loaded membrane is trebled over the membrane without silver. Remarkably, the TMC0.6%-PEA10%(AgNO3)10:9-2/PDMS/PSF membranes show great long-term stability of about 29 days. In this work, both monomer synthesis and preparation methods are facile and versatile, presenting a promising strategy for the preparation of silver-loaded membranes with a long-term separation property.
研究领域:
化学工程
·
材料科学
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 21.1
He Xu,Xinyu Wang,Jingjing Wang,Jingyao Wang,Yujie Liu,Lianghui Xia,Yingying Yong,Yanfei Jian,Reem Albilali,Chi He
The widely presented industrial light alkanes (LAs) have posed significant hazards to the environment and human health; however, the efficacious catalytic purification of LAs is still greatly suffered from their strong chemical stability and catalyst deactivation due to the presence of sulfur-containing impurity in practical exhausts. Herein, cobalt phosphate (Co 3 (PO 4 ) 2 )-modified Pt/CeO 2 catalysts (Pt/CeO 2 - x CP) with boosted activity and sulfur resistance were rationally engineered. Results revealed that Pt/CeO 2 -0.2CP shows the highest C 3 H 8 oxidation activity with 90 % of which oxidized at 260 °C and apparent activation energy ( E a ) of 84.39 kJ∙mol −1 , obviously lower than that of Pt/CeO 2 . Remarkably, the activity of Pt/CeO 2 -0.2CP is well-maintained in 24 h of successive operation with the co-existence of 250 H 2 S, while over 20 % of C 3 H 8 conversion reduction can be found over Pt/CeO 2 due to the deactivation of Pt 4+ active sites by surface sulfation. The Co 3 (PO 4 ) 2 -Pt interface promotes the electron transfer from Pt δ+ to phosphorus component and weakens the Pt-O-Ce bond, thereby generating more highly active Pt 4+ sites and oxygen vacancy, polarizing the electron cloud around the C-H bond and oxygen molecules and promoting C 3 H 8 oxidation. Meanwhile, the Co 3 (PO 4 ) 2 modification optimizes the surface acidity of Pt/CeO 2 -CP, effectively weakens the adsorption and oxidation of H 2 S, and maintains the formation and consumption of high active oxygen species, resulting in strong sulfur resistance. This work provides important insights for the rational design of efficient sulfur-tolerant catalysts towards LAs purification under harsh conditions.
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2020
·
IF 12.35
Bangxin Li,Shuai He,Jibiao Li,Xiangling Yue,John T.S. Irvine,Deti Xie,Jiupai Ni,Chengsheng Ni
Employment of identical oxides for the cathode and anode in a symmetrical solid oxide fuel cell (SSOFC) is beneficial for decreasing the fabrication costs of a robust cell. Ce doping on the A site of SrFeO3 increased the structural stability in a reducing atmosphere, but ceria was found to exsolve from the perovskite during the cooling process in the air if the doping level reached 20 atom %. The additional doping of 5 atom % Ru in Sr0.8Ce0.2FeO3 on the Fe site could prevent the ceria segregation in air and induce the surface decomposition under fuel conditions for the formation of nanoscale SrO, CeO2, and Ru0. The SSOFC with Ce/Ru codoped SrFeO3 on a Sr- and Mg-doped LaGaO3 electrolyte showed a small Rp value (0.12 Ω cm2) when H2 and ambient air were used as fuel and oxidant, respectively. The peak power densities of 846 and 310 mW cm–2 were achieved at 800 °C using H2 and C3H8 as fuel, respectively. The excellent coke resistance of the anode could be related to the simultaneous in situ exsolution of CeO2, SrO, and Ru0 nanoparticles.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jiayi Liu,Yaohui Zhang,Yujie Ban,Weishen Yang
Emissions from the petrochemical industry often contain by-product hydrogen alongside various hydrocarbons, leading to both resource wastage and increased air pollution. The separation of H 2 from these hydrocarbons is thus of considerable economic and environmental importance. Conventional polymer membranes face inherent trade-offs between gas permeability and selectivity. To overcome this limitation, this study introduces a strategy to assemble metal–organic framework (MOF) nanoparticles into a sponge-like architecture on the surface of an ultrathin rubbery polysiloxane membrane, achieved by synergistically harnessing spin-coating-induced centrifugal forces and polymer–MOF chemical pinning forces. The resulting intricate sponge-like structure greatly promotes repeated adsorption–desorption cycles for the more condensable hydrocarbons, thereby markedly slowing their permeation through the membrane. The composite membrane achieves H 2 /CH 4 , H 2 /C 2 H 6 , and H 2 /C 3 H 8 separation factors of 136, 1370, and 1610, respectively, while maintaining H 2 permeances of 439 to 473 GPU. The membrane's effectiveness is further demonstrated for hydrogen separation from a simulated hydrocarbon-rich industrial tail gas: H 2 is enriched from 10% to 83% in the permeate. In doing so, the membrane not only efficiently recovers hydrogen but also reduce the combined emissions of six representative C 1 –C 4 hydrocarbons by 78%. This sponge-like MOF-polymer composite introduces a new paradigm for advanced H 2 /hydrocarbon separation membranes.
研究领域:
材料科学
·
膜技术
·
气体分离
·
石油化工工程
·
纳米材料
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）