Dehydration of Highly Concentrated Solutions of Fructose to 5-Hydroxymethylfurfural in a Cheap and Sustainable Choline Chloride/Carbon Dioxide System

ChemSusChem ◽  
2012 ◽  
Vol 5 (7) ◽  
pp. 1223-1226 ◽  
Author(s):  
Fei Liu ◽  
Joël Barrault ◽  
Karine De Oliveira Vigier ◽  
François Jérôme
Keyword(s):  
Carbon Dioxide ◽  
Choline Chloride ◽  
Concentrated Solutions

scholarly journals Review on Carbon Dioxide Absorption by Choline Chloride/Urea Deep Eutectic Solvents

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Rima J. Isaifan ◽  
Abdukarem Amhamed
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Bond ◽  
Ionic Liquids ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Absorption Capacity ◽  
Carbon Dioxide Absorption ◽  
Hydrogen Bond Donor ◽  
Separation Processes ◽  
Hydrogen Bond Acceptor

In the recent past few years, deep eutectic solvents (DESs) were developed sharing similar characteristics to ionic liquids but with more advantageous features related to preparation cost, environmental impact, and efficiency for gas separation processes. Amongst many combinations of DES solvents that have been prepared, reline (choline chloride as the hydrogen bond acceptor mixed with urea as the hydrogen bond donor) was the first DES synthesized and is still the one with the lowest melting point. Choline chloride/urea DES has proven to be a promising solvent as an efficient medium for carbon dioxide capture when compared with amine alone or ionic liquids under the same conditions. This review sheds light on the preparation method, physical and chemical characteristics, and the CO2 absorption capacity of choline chloride/urea DES under different temperatures and pressures reported up to date.

scholarly journals Carbon Dioxide Capture by Deep Eutectic Solvent Impregnated Sea Mango Activated Carbon

2018 ◽  
Vol 34 ◽  
pp. 02030 ◽  
Author(s):  
N.Z. Zulkurnai ◽  
U.F. Md. Ali ◽  
N. Ibrahim ◽  
N.S. Abdul Manan
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Activated Carbon ◽  
Carbon Dioxide Capture ◽  
Choline Chloride ◽  
Fixed Bed ◽  
Deep Eutectic Solvent ◽  
Liquid Ratio ◽  
Fixed Bed Column ◽  
Modified Surface

The increment amount of the CO2 emission by years has become a major concern worldwide due to the global warming issue. However, the influence modification of activated carbon (AC) has given a huge revolution in CO2 adsorption capture compare to the unmodified AC. In the present study, the Deep Eutectic Solvent (DES) modified surface AC was used for Carbon Dioxide (CO2) capture in the fixed-bed column. The AC underwent pre-carbonization and carbonization processes at 519.8 °C, respectively, with flowing of CO2 gas and then followed by impregnation with 53.75% phosphoric acid (H3PO4) at 1:2 precursor-to-activant ratios. The prepared AC known as sea mango activated carbon (SMAC) was impregnated with DES at 1:2 solid-to-liquid ratio. The DES is composing of choline chloride and urea with ratio 1:2 choline chloride to urea. The optimum adsorption capacity of SMAC was 33.46 mgco2/gsol and 39.40 mgco2/gsol for DES modified AC (DESAC).

scholarly journals Gold-Like Activity, Copper-Like Selectivity of Heteroatomic Transition Metal Carbides (M2C) for Electrocatalytic Carbon Dioxide Reduction Reaction

2021 ◽  
Author(s):  
Mohammadreza Esmaeilirad ◽  
Artem Baskin ◽  
Alireza Kondori ◽  
Ana Sanz Matias ◽  
Jin Qian ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Density Functional ◽  
Choline Chloride ◽  
Fuel Efficiency ◽  
Photovoltaic Cell ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Transition Metal Carbide ◽  
Highly Active

Abstract An overarching challenge of the electrochemical carbon dioxide reduction reaction (eCO2RR) is finding an earth-abundant, highly active catalyst that selectively produces hydrocarbons at relatively low overpotentials. Here, we have studied the two-dimensional transition metal carbide (TMC) class of materials and found that di-tungsten carbide (W2C) nanoflakes exhibit maximum methane (CH4) current density of -421.63 mA/cm2 and a CH4 faradic efficiency of 82.7%±2% in a hybrid electrolyte of 3 M potassium hydroxide (KOH) and 2 M choline-chloride (CC). Powered by a triple junction photovoltaic cell, we have demonstrated a flow electrolyzer that uses humidified CO2 to produce CH4 in a 700-hours process under one sun illumination with a CO2RR energy efficiency of about 62.3% and a solar-to-fuel efficiency of 20.7%. Density functional theory (DFT) calculations reveal that dissociation of water, chemisorption of CO2 and cleavage of the C-O bond – the most energy consuming elementary steps in other catalysts such as copper – become nearly spontaneous at the W2C surface. This results in instantaneous formation of adsorbed CO – an important reaction intermediate – and an unlimited source of protons near the tungsten surface sites that are the main reasons for the observed superior activity, selectivity, and small potential.

Supported choline chloride/urea as a heterogeneous catalyst for chemical fixation of carbon dioxide to cyclic carbonates

2007 ◽  
Vol 9 (2) ◽  
pp. 169-172 ◽  
Author(s):  
Anlian Zhu ◽  
Tao Jiang ◽  
Buxing Han ◽  
Jicheng Zhang ◽  
Ye Xie ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Heterogeneous Catalyst ◽  
Choline Chloride ◽  
Chemical Fixation ◽  
Cyclic Carbonates ◽  
Fixation Of Carbon Dioxide

scholarly journals Gold-like activity copper-like selectivity of heteroatomic transition metal carbides for electrocatalytic carbon dioxide reduction reaction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mohammadreza Esmaeilirad ◽  
Artem Baskin ◽  
Alireza Kondori ◽  
Ana Sanz-Matias ◽  
Jin Qian ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Density Functional ◽  
Choline Chloride ◽  
Fuel Efficiency ◽  
Density Functional Theory Calculations ◽  
Photovoltaic Cell ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Transition Metal Carbide

AbstractAn overarching challenge of the electrochemical carbon dioxide reduction reaction (eCO2RR) is finding an earth-abundant, highly active catalyst that selectively produces hydrocarbons at relatively low overpotentials. Here, we report the eCO2RR performance of two-dimensional transition metal carbide class of materials. Our results indicate a maximum methane (CH4) current density of −421.63 mA/cm2 and a CH4 faradic efficiency of 82.7% ± 2% for di-tungsten carbide (W2C) nanoflakes in a hybrid electrolyte of 3 M potassium hydroxide and 2 M choline-chloride. Powered by a triple junction photovoltaic cell, we demonstrate a flow electrolyzer that uses humidified CO2 to produce CH4 in a 700-h process under one sun illumination with a CO2RR energy efficiency of about 62.3% and a solar-to-fuel efficiency of 20.7%. Density functional theory calculations reveal that dissociation of water, chemisorption of CO2 and cleavage of the C-O bond—the most energy consuming elementary steps in other catalysts such as copper—become nearly spontaneous at the W2C surface. This results in instantaneous formation of adsorbed CO—an important reaction intermediate—and an unlimited source of protons near the tungsten surface sites that are the main reasons for the observed superior activity, selectivity, and small potential.

Sign in / Sign up

Export Citation Format

Share Document