Carbon dioxide (CO2) capture has attracted great interest these days due to the role of CO2 in global warming and its effects in industrial processes. Thus, higher energy efficient and affordable technologies are required for its removal so as to address these problems. In this work, the reaction kinetics of CO2 with 2-amino-2-hyroxymethyl-1,3-propanediol (AHPD), a sterically hindered amine (SH...

The effects of sleep on the ventilatory responses to hypercapnia have been well described in animals and humans. In contrast, there is little information for genioglossus (GG) responses to a range of CO2 stimuli across all sleep-wake states. Given the notion that sleep, especially rapid-eye-movement (REM) sleep, may cause greater suppression of muscles with both respiratory and non-respiratory ...

Kinetic behaviour of three samples of samarium oxide (cubic (Sm-1 ), monoclinic (Sm-3) and mixed cubic-monoclinic (Sm 2) ) were studied in the oxidative coupling of methane using a gradientless flow circulation system. The specific rate of C2product formation differed by a factor of 6-8 for Sm-1 and Sm-3. The specific activity for CO formation did not depend upon the crystal structure of samari...

The precipitation of magnesium hydroxy-carbonate hydrates has been suggested as a route to sequester CO2 into solids. We report the development of self-cementing compositions based on nesquehonite, MgCO3⋅3H2O, that are made from CO2-containing gas streams, the CO2 being separated from other gases by its high solubility in alkaline water, while magnesium is typically provided by waste desalinati...

Synthesis of dimethyl carbonate (DMC) from CO2 and methanol under milder reaction conditions was performed using reduced cerium oxide catalysts and reduced copper-promoted Ce oxide catalysts. Although the conversion of methanol was low (0.005-0.11%) for 2 h of reaction, DMC was synthesized as low as 353 K and at total pressure of as low as 1.3 MPa using reduced Cu-CeO2 catalyst (0.5 wt% of Cu)....

Recent knowledge in chemistry has enabled the material utilization of greenhouse gas (CO2) for production organic carbonates using mild reaction conditions. Organic carbonates, especially cyclic are applicable as green solvents, electrolytes batteries, feedstock fine chemicals and monomers polycarbonate production. This review summarizes new developments ring opening epoxides with subsequent CO...

The adsorption of carbon dioxide on CeO2(111) has been studied using density functional theory. At low coverage (1/9 monolayer), CO2 is found to preferably adsorb in a monodentate configuration forming a carbonate species with a surface O atom. In this configuration, the CO2 molecule is bent with an O-C-O angle of 129 degrees and a remarkable elongation (to 1.27 angstrom) of the C-O bond length...

The one-step synthesis method of nitrogen doped microporous carbon monoliths derived from biomass with high-efficiency is developed using a novel ammonia (NH3)-assisted activation process, where NH3 serves as both activating agent and nitrogen source. Both pore forming and nitrogen doping simultaneously proceed during the process, obviously superior to conventional chemical activation. The as-p...

The present study aims at evaluating the suitability of producing activated carbons (ACs) derived from wheat straw by a one-step synthesis approach, as an alternative to more conventional two steps production processes (i.e., pyrolysis and subsequent activation). performance produced ACs, in one or steps, sustainable selective CO2 adsorbents for CH4/CO2 separation is compared. In addition, infl...

Expression of Cah1, encoding a periplasmic carbonic anhydrase in Chlamydomonas reinhardtii Dangeard, is activated when cells are exposed to low-CO2 conditions (0.04% [v/v]) in light. By using an arylsulfatase reporter gene, a regulatory region essential for the transcriptional activation of Cah1 was delimited to a 63-bp fragment between -293 and -231 relative to the transcription start site. Li...