Membrane process design for biohydrogen purification with simultaneous CO2 capture: Feasibility and techno-economic assessment

Chemical Engineering Science, Год журнала: 2023, Номер 282, С. 119219 - 119219

Опубликована: Сен. 3, 2023

In this work, a membrane separation process is designed and optimized to purify dark fermentative biohydrogen by removing CO2. A CO2-selective PVAm-based nanocomposite was selected considering its high CO2/H2 performance unique features suitable for the process. We tested performances under conditions provide more accurate simulation basis. Several design scenarios were investigated. two-stage with recycle stream determined as optimal design, in which specific cost purifying H2 99.5 vol% loss of <10% reaches only 0.156 $/Nm3. The techno-economic feasibility study purification simultaneous CO2 capture also performed through an alternative introducing 3rd-stage using same or H2-selective membrane. Adding can side product various purities, further decreases loss, leading additional economic benefits.

Язык: Английский

---

Molecular Engineering of Copoly(ionic liquids)-Based Membranes for CO₂ Separation

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(3), С. 1853 - 1863

Опубликована: Янв. 22, 2024

The development of materials has given rise to the study and design poly(ionic liquid)s (PILs) for making CO2-selective membranes. huge space chemical structures PILs provides great opportunities further investigate factors underlying gas permeability selectivity. Herein, copolymerizing imidazolium-based ionic liquid (IL) monomers with two functionalized acrylamide (AM) butyl acrylate (BA) based on free radical polymerization was conducted, effect PIL-based copolymers their performances derived membranes CO2/N2 separation evaluated. Nuclear magnetic resonance (NMR) Fourier transform infrared (FTIR) spectroscopy analysis confirmed successful synthesis copoly(ionic liquids) (co-PILs) designed structures. co-PIL-based composite were fabricated by coating copolymer solutions surface a commercial polysulfone (PSF) membrane. It found that best present significantly enhanced CO2 permeance (76 GPU) selectivity (53) 262% 61% compared pure PSF proposed method using co-PILs facile solution improve membrane performance. Therefore, molecular engineering opens venue develop high-performance potential capture from flue gases.

Язык: Английский

---

Membranes and membrane processes for CO2 separation: MEMFO's long-term effort in reducing carbon emissions

Carbon Capture Science & Technology, Год журнала: 2024, Номер 11, С. 100193 - 100193

Опубликована: Янв. 24, 2024

Urgent actions are needed to reduce CO2 emissions and mitigate the increasingly severe impacts of climate change. Since 1990s, membrane research group (MEMFO) at Norwegian University Science Technology has been committed developing effective membranes processes for separation. MEMFO's can be categorized into five main themes: facilitated transport membranes, hybrid carbon contactors, related modeling process simulation. These themes tied industrial applications in capture from flue gas, biogas upgrading, natural gas sweetening, hydrogen purification. Promising identified based on their laboratory-scale performances, have selected onsite testing validate performances as well stability durability. Verified upscaled pilot tests. This account paper summarizes development outcomes over past decade discusses our strategies perspectives future work.

Язык: Английский

---

Separation of CO₂/CH₄ gas mixtures using nanoporous graphdiyne and boron-graphdiyne membranes: influence of the pore size

Physical Chemistry Chemical Physics, Год журнала: 2024, Номер 26(22), С. 15916 - 15926

Опубликована: Янв. 1, 2024

Pore and molecular sizes determine the permeability selectivity for gas mixture separation. Therefore, GDY exhibits great CO 2 /CH 4 mixtures.

Язык: Английский

---

The Impact of Cement Plant Air Ingress on Membrane-Based CO2 Capture Retrofit Cost

Carbon Capture Science & Technology, Год журнала: 2024, Номер 11, С. 100201 - 100201

Опубликована: Фев. 9, 2024

The industrial sector is responsible for a significant portion of global CO2 emissions. Since some emissions cannot be avoided, carbon capture and storage has critical role to play in decarbonization. objective this study highlight the impact false air ingress—a standard cement production process occurrence that dilutes kiln emissions—on utilizing membrane-based plant Correlations ideal countercurrent membrane separation compression purification unit (CPU) model are integrated estimate performance two-stage system with CPU; parameters varied, permeance ranging from 1,000 10,000 GPU CO2:N2 selectivity 25 200. range values evaluated reflects current commercially available membranes through future stretch yet developed membranes. By evaluating large material performance, can used by developers inform which offer greatest potential overall cost reductions based on assumptions. capital operating costs resulting captured (COC) estimated. A conventional solvent-based derived similar basis presented comparison. results indicate configuration presented, (1) increasing 60 significantly reduce cost, but further improving selectivity, or beyond GPU, only incremental impact; (2) COC systems comparable when ingress into stream neglected; (3) included, while incrementally affected, impacted, rising 64–111%. Cement plants have typically been characterized flue gas concentrations higher than those coal- natural gas-fired power plants, idealized scenarios provides driving force separation; however, substantial diluting reverses advantage, leading higher-than-expected costs. It recommended research development techno-economic analyses address design.

Язык: Английский

---

Hybrid Model as an Efficient Predictor of Mass Transfer Behavior in Hollow Fiber Membrane Contactors with Complex Geometries

Journal of Membrane Science, Год журнала: 2025, Номер unknown, С. 124022 - 124022

Опубликована: Март 1, 2025

Язык: Английский

---

CO2 capture: a concise, comprehensive overview of recent research trends

Опубликована: Май 28, 2025

Due to the growing threat of climate change, pressing need for carbon dioxide capture has become a global priority in development innovative technologies. Multipronged approaches and multifarious research efforts are underway efficiently (CO2) from emission sources, ambient air, indoor air. Currently, absorption is dominant industrial-scale process, using different solvents their blends lower energy intensity solvent desorption regeneration. However, adsorption emerging as promising alternative due its efficiency, eco-friendliness, potential large-scale applications. High-performance sorbents with large surface areas bio-based materials exhibit high CO2 loading selectivity fixed-bed fluidized-bed systems. Cryogenic systems, which do not require or membranes, optimized through process integration. Researchers investigating membrane hollow fiber contactors enhanced efficiency. Membranes that can selectively filter gas mixtures also being explored. Furthermore, hybrid technologies integrating developed reduce costs boost overall performance curb rising atmospheric levels.

Язык: Английский

---

Adsorption Capacity Enhancement on Coal Fly Ash for Carbon Capture in Humid Flue Gas: A Critical Review

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Июнь 3, 2025

Язык: Английский

---

CO₂‐Responsive Copolymers for Membrane Applications, Synthesis, and Performance Evaluation

Macromolecular Materials and Engineering, Год журнала: 2024, Номер unknown

Опубликована: Окт. 18, 2024

Abstract The urgent need to mitigate climate change has spurred research into innovative carbon dioxide (CO 2 ) capture materials. In this study, the design and synthesis of CO ‐responsive diblock copolymers, poly (N‐[3‐(dimethylamino)propyl]‐acrylamide)‐ b ‐poly(methyl methacrylate) (PDMAPAm‐ ‐PMMA) are focused on via a two‐step reversible addition−fragmentation chain‐transfer (RAFT) polymerization as well application synthesized copolymer membrane for capture. resulting possesses distinct blocks with varying properties. (N‐[3‐(dimethylamino)propyl]‐acrylamide) (PDMAPAm) block provides behavior, while poly(methyl (PMMA) contributes mechanical stability. gas transport properties fabricated thin‐film composite made PDMAPAm‐ ‐PMMA measured. It is determined that exhibits dual responsiveness towards can be tailored use in fabrication membranes direct air (DAC).

Язык: Английский

---

CO₂ capture for environmental remediation with hollow fibre membrane: Impact of air gap and bore fluid ratio onto the morphology and performance

Asia-Pacific Journal of Chemical Engineering, Год журнала: 2024, Номер unknown

Опубликована: Сен. 5, 2024

Abstract Hollow fibre membrane (HFM) is favourable for carbon dioxide (CO 2 ) due to its high packing density and volume area ratio. In this study, the effect of air gap bore fluid ratio explored study influence on morphology separation performance. With dope extrusion rate (DER), shear‐induced polymer orientation can be preserved with low which come cost deformed lumen. As such, coagulant activity reduced by introducing solvent, in turn reduces phase inversion prevent sudden contraction at gap, thus allowing proper formation presence flowability solution increased viscosity as solvent content make contact external coagulant. HFM spun shows stretched gravitational pull upon being extruded from spinneret. This improved chain stretch across spinning line. Subsequently, 80 wt.% N‐methyl‐2‐pyrollidone (NMP) using narrow spinneret 5‐cm highest ideal CO /N /CH 4 selectivity 23.4 28 respectively, even though it also exhibit lowest permeance only 3.1 GPU was ascribed dense skin layer. Meanwhile, when a bigger annulus slightly dropped, however increment.

Язык: Английский

---