Four kinds of deep eutectic solvents (DESs) based on choline chloride (ChCl) with ethylene glycol (EG), malonic acid (MA), urea, and thiourea as hydrogen bond donors were prepared and characterized. All these DESs show good thermal stability and can be stable at 363 K, which is beneficial for the application in flue gas desulfurization. Then, SO2 absorption capacities of these DESs were determined at different temperatures and SO2 partial pressures. The absorption results demonstrate that ChCl–EG (1:2) and ChCl–thiourea (1:1) DESs exhibit excellent absorption performances, and the absorption capacities are 2.88 and 2.96 mol SO2 per mol DES at 293 K and 1 atm, respectively. In addition, the SO2 absorption and regeneration experiments were conducted. All solvents can be regenerated at 343 K with N2 bubbling, and the absorption capacities of DESs remain without a significant loss after six absorption and desorption cycles. What’s more, the absorption mechanism of SO2 in these DESs were investigated by IR and...

Efficient SO2 Absorptions by Four Kinds of Deep Eutectic Solvents Based on Choline Chloride

CO2 separation plays an important role in energy saving and CO2 emission reduction, both of which are necessary to address the issue of global warming Ionic liquids (ILs) have been proposed to be “green” solvents for CO2 separation Unfortunately, the high cost, toxicity, and poor biodegradability of these compounds limit their large-scale application Deep eutectic solvents (DESs) were recently considered a new type of IL with additional advantages in terms of cost, environmental impact, and synthesis DESs based on choline salts (ie, choline-based DESs) are promising candidates for CO2 separation In this work, the microstructures, physicochemical properties, and water effect of choline-based DESs are surveyed and compared with those of conventional ILs The properties of choline-based DESs are similar to those of conventional ILs, but research on the latter remains limited Further study on the microstructures, properties, and separation performance of choline-based DESs considering dynamic factors must be carried out through experimental measurements and model development Thermodynamic analysis based on Gibbs free energy change is conducted to investigate the performances of choline-based-DESs during CO2 separation from biogas Choline-based-DESs are screened on the basis of energy use and amount of absorbent needed The performances of the screened choline-based-DESs are further compared with those of conventional ILs screened in our previous work, as well as commercial CO2 absorbents Comparisons indicate that the screened DES-based absorbents show great application potential due to their nonvolatility, low energy use, or low amount required The performances of physical choline-based-DES and 30 wt% MEA for CO2 separation from other gas streams (eg, flue gas, lime kiln gas, and bio-syngas) are discussed Considering the high amounts of physical absorbents required to enable separation, further study with techno-economic analysis needs to be carried out

Choline-based deep eutectic solvents for CO2 separation: Review and thermodynamic analysis

Membrane distillation hybrids for water production and energy efficiency enhancement: A critical review

https://www.research.manchester.ac.uk/portal/files/78267441/accepted_manuscript_CEJ.pdf

Air-gap membrane distillation as a one-step process for textile wastewater treatment

Strategies to boost anaerobic digestion performance of cow manure: Laboratory achievements and their full-scale application potential.

Utilization path of bulk industrial solid waste: A review on the multi-directional resource utilization path of phosphogypsum.

Enhanced anaerobic fermentation of dairy manure by microelectrolysis in electric and magnetic fields

Concentration and treatment of ceric ammonium nitrate wastewater by integrated electrodialysis-vacuum membrane distillation process

The popularization of biogas project produced a large number of anaerobic fermentation residues. The resource recycling and harmless utilization of these residues have become one of the hottest researches of related areas. This article summarizes the current situation about researching and utilization of biogas slurry and residues contained their components, functions and status of study domestic and foreign systematically. This study introduces the basic characters of biogas slurry and residues, and systematically summarizes it's newly application and investigation all over the world, and also pointed out the shortcomings. Finally, we forecast the new ways of anaerobic fermentation residues utilization from ecological, environmental and economic points of view.

Guangfei Qu

Papers

Utilization path of bulk industrial solid waste: A review on the multi-directional resource utilization path of phosphogypsum.

Enhanced anaerobic fermentation of dairy manure by microelectrolysis in electric and magnetic fields

Concentration and treatment of ceric ammonium nitrate wastewater by integrated electrodialysis-vacuum membrane distillation process

The Resource Utilization of Anaerobic Fermentation Residue

Self-made anion-exchange membrane with polyaniline as an additive for sulfuric acid enrichment