Oxygen elimination in the process of non-catalytic liquefaction of brown coal

Sustainable Carbon/Carbon Supercapacitors Operating Down to −40 °C in Aqueous Electrolyte Made with Cholinium Salt

“…Moreover, CO desorption at around the same temperature as CO 2 , owing to the decomposition of carboxylic groups, was reported previously by Figueiredo et al In separate works by Moreno‐Castilla et al . and Surygała et al., the CO peak appearing at low temperatures is probably related to the decomposition of carbonyl groups in α‐substituted ketones and aldehydes. Further mass loss contributions after 300 °C are characterized by a broad CO 2 peak, which, upon coupling with the CO pattern (at ca.…”

Preparation, surface characteristics, and electrochemical double-layer capacitance of KOH-activated carbon aerogels and their O- and N-doped derivatives

“…A small CO desorption peak appears in the same region and likely derives from the decomposition of carbonyl Table 3 Amounts of CO and CO 2 evolved up to 1000 C, oxygen contents, immersion enthalpy into benzene and water, and hydrophobicity (HF) of the carbon aerogels, activated carbon aerogels, and their O-and N-doped derivatives. groups into a-substituted ketones and aldehydes [22,30]. After the maximum in the CO 2 -desorption profile, there is a tail up to around 1000 C, with several shoulders and plateaus indicating the presence of chemically different functionalities such as lactones and anhydrides, or the same oxygen functionality at energetically different sites [31].…”

Characterization of Active Sites on Carbon Catalysts

“…Nevertheless, as it was observed experimentally that these small CO peaks at low temperatures are released at the same time as the CO 2 peaks, it was assumed that for activated carbons oxidized in the liquid phase there are two CO peaks at low temperature (CO peaks #1 and #2) with the same peak center and width at half-height of those obtained for the carboxylic groups in the CO 2 peak. Almost all of the authors ignore the CO peaks at low temperature, but according to Moreno-Castilla et al, 26 based on the work of Surygala et al, 27 the CO peak that appears at low temperatures probably comes from the decomposition of carbonyl groups in R-substituted ketones and aldehydes.…”