scholarly journals Direct CO2 capture and conversion to fuels on magnesium nanoparticles under ambient conditions simply using water

2021 ◽  
Author(s):  
Sushma A. Rawool ◽  
Rajesh Belgamwar ◽  
Rajkumar Jana ◽  
Ayan Maity ◽  
Ankit Bhumla ◽  
...  
Keyword(s):  
Formic Acid ◽  
Co2 Capture ◽  
Ambient Conditions ◽  
External Energy ◽  
Magnesium Nanoparticles

We demonstrated the use of magnesium nanoparticles (and bulk) to convert CO2 (pure & also from the air) to methane, methanol, formic acid and green cement without external energy within a few minutes, using only water as the sole hydrogen source.

scholarly journals Rapid synchronized fabrication of vascularized thermosets and composites

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mayank Garg ◽  
Jia En Aw ◽  
Xiang Zhang ◽  
Polette J. Centellas ◽  
Leon M. Dean ◽  
...  
Keyword(s):  
Large Scale ◽  
Capillary Flow ◽  
External Heat ◽  
Frontal Polymerization ◽  
Self Healing ◽  
Vascular Networks ◽  
Ambient Conditions ◽  
External Energy ◽  
Imaging Phantoms ◽  
Vascular Structures

AbstractBioinspired vascular networks transport heat and mass in hydrogels, microfluidic devices, self-healing and self-cooling structures, filters, and flow batteries. Lengthy, multistep fabrication processes involving solvents, external heat, and vacuum hinder large-scale application of vascular networks in structural materials. Here, we report the rapid (seconds to minutes), scalable, and synchronized fabrication of vascular thermosets and fiber-reinforced composites under ambient conditions. The exothermic frontal polymerization (FP) of a liquid or gelled resin facilitates coordinated depolymerization of an embedded sacrificial template to create host structures with high-fidelity interconnected microchannels. The chemical energy released during matrix polymerization eliminates the need for a sustained external heat source and greatly reduces external energy consumption for processing. Programming the rate of depolymerization of the sacrificial thermoplastic to match the kinetics of FP has the potential to significantly expedite the fabrication of vascular structures with extended lifetimes, microreactors, and imaging phantoms for understanding capillary flow in biological systems.

Migration-assisted, moisture gradient process for ultrafast, continuous CO2 capture from dilute sources at ambient conditions

2022 ◽  
Author(s):  
Aditya Prajapati ◽  
Rohan Sartape ◽  
Tomás Rojas ◽  
Naveen K. Dandu ◽  
Pratik Dhakal ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Electric Field ◽  
Co2 Capture ◽  
Moisture Gradient ◽  
Low Energy ◽  
Ambient Conditions ◽  
Capture Process ◽  
Low Energy Consumption

An ultrafast, continuous CO2 capture process driven by moisture gradient and electric field with low energy consumption to capture and concentrate CO2 from dilute sources.

Building metal-functionalized porous carbons from microporous organic polymers for CO2 capture and conversion under ambient conditions

2019 ◽  
Vol 9 (16) ◽  
pp. 4422-4428 ◽  
Author(s):  
Shuai Gu ◽  
Wenguang Yu ◽  
Jingjing Chen ◽  
He Zhang ◽  
Yan Wang ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Organic Polymers ◽  
Porous Carbons ◽  
Ambient Conditions ◽  
Microporous Organic Polymers ◽  
Physical And Chemical ◽  
And Chemical Properties

Metal-functionalized porous carbons derived from microporous organic polymers remain highly desired for their intriguing physical and chemical properties.

scholarly journals From Homogeneous to Heterogenized Molecular Catalysts for H2 Production by Formic Acid Dehydrogenation: Mechanistic Aspects, Role of Additives, and Co-Catalysts

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 733 ◽  
Author(s):  
Panagiota Stathi ◽  
Maria Solakidou ◽  
Maria Louloudi ◽  
Yiannis Deligiannakis
Keyword(s):  
Formic Acid ◽  
Sodium Formate ◽  
H2 Production ◽  
Ambient Conditions ◽  
Co Catalysts ◽  
High Concentrations ◽  
Formic Acid Dehydrogenation ◽  
Key Steps ◽  
Molecular Catalysts

H2 production via dehydrogenation of formic acid (HCOOH, FA), sodium formate (HCOONa, SF), or their mixtures, at near-ambient conditions, T < 100 °C, P = 1 bar, is intensively pursued, in the context of the most economically and environmentally eligible technologies. Herein we discuss molecular catalysts (ML), consisting of a metal center (M, e.g., Ru, Ir, Fe, Co) and an appropriate ligand (L), which exemplify highly efficient Turnover Numbers (TONs) and Turnover Frequencies (TOFs) in H2 production from FA/SF. Typically, many of these ML catalysts require the presence of a cofactor that promotes their optimal cycling. Thus, we distinguish the concept of such cofactors in additives vs. co-catalysts: When used at high concentrations, that is stoichiometric amounts vs. the substrate (HCOONa, SF), the cofactors are sacrificial additives. In contrast, co-catalysts are used at much lower concentrations, that is at stoichiometric amount vs. the catalyst. The first part of the present review article discusses the mechanistic key steps and key controversies in the literature, taking into account theoretical modeling data. Then, in the second part, the role of additives and co-catalysts as well as the role of the solvent and the eventual inhibitory role of H2O are discussed in connection to the main mechanistic steps. For completeness, photons used as activators of ML catalysts are also discussed in the context of co-catalysts. In the third part, we discuss examples of promising hybrid nanocatalysts, consisting of a molecular catalyst ML attached on the surface of a nanoparticle. In the same context, we discuss nanoparticulate co-catalysts and hybrid co-catalysts, consisting of catalyst attached on the surface of a nanoparticle, and their role in the performance of molecular catalysts ML.

Phyllosilicate nanoclay-based aqueous nanoparticle sorbent for CO2 capture at ambient conditions

2017 ◽  
Vol 9 ◽  
pp. 451-455 ◽  
Author(s):  
Liling Fu ◽  
Kasibhatta Kumara Ramanatha Datta ◽  
Konstantinos Spyrou ◽  
Genggeng Qi ◽  
Ali Sardar ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Ambient Conditions

Ca-Embedded C2N: an efficient adsorbent for CO2 capture

2017 ◽  
Vol 19 (41) ◽  
pp. 28323-28329 ◽  
Author(s):  
Yuzhen Liu ◽  
Zhaoshun Meng ◽  
Xiaojian Guo ◽  
Genjian Xu ◽  
Dewei Rao ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Multiscale Simulations ◽  
Ambient Conditions ◽  
Efficient Adsorbent

Multiscale simulations demonstrated that Ca-embedded C2N could be a promising adsorbent for high CO2 storage at ambient conditions.

Pillar[5]arene-Based Supramolecular Organic Frameworks for Highly Selective CO2-Capture at Ambient Conditions

2014 ◽  
Vol 26 (41) ◽  
pp. 7027-7031 ◽  
Author(s):  
Li-Li Tan ◽  
Haiwei Li ◽  
Yanchun Tao ◽  
Sean Xiao-An Zhang ◽  
Bo Wang ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Ambient Conditions
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