Scalability, cost, and feasibility of porous structures in gas capture are prerequisites for emerging materials to be promising the industry. Herein, a simpler variant Friedel−Crafts’ synthesis highly covalent organic polymers (COPs) based on an unprecedented solvent-mediated crosslinking is presented. Alkyl chlorides behave as both solvents linkers presence AlCl3. Studies three classes 18 diff...

This work deals with the influence of functionalization degree on the thermogravimetric and rheological behaviour of NCO-functionalized chitosanand chitin-based oleogels. Chitosan and chitin were functionalized using different proportions of 1,6-hexamethylene diisocyanate (HMDI) and subsequently dispersed in castor oil to promote the chemical reaction between the –NCO group of the modified biop...

Two hydroxy double salts (HDSs), zinc copper hydroxy acetate (ZCA) and zinc nickel hydroxy acetate (ZNA), and an analogous layered compound, zinc hydroxy acetate (ZHA), have been prepared by a coprecipitation method. The thermal degradation of these materials was characterized via thermogravimetric analysis (TGA), differential thermal analysis (DTA), and TGA coupled with Fourier transform infra...

The main objective of this work was the incorporation of reactive isocyanate groups into chitin and chitosan in order to effectively use the products as reactive thickening agents in castor oil. The resulting gel-like dispersions could be potentially used as biodegradable lubricating greases. Three different NCO-functionalized polymers were obtained: two of them by promoting the reaction of chi...

The behavior of Fe2O3/Al2O3 particles as oxygen carriers (OCs) for CO chemical looping combustion (CLC) under different reaction temperatures (700 ◦C, 800 ◦C, 900 ◦C, and 1000 ◦C) were tested in a lab-scale fluidized bed and a thermogravimetric analysis (TGA) unit. The results show that the oxygen carrier presents the highest reactivity at 800 ◦C, even after 30 cycles of redox reaction in a flu...

The methods of thermogravimetric analysis (TGA) and differential scanning calorimettry (DSC) have been used to study the thermal decomposition of ammonium perchlorate (AP). TGA curves obtained under both isothermal and nonisothermal conditions show a characteristic slowdown at the extents of conversion, R ) 0.30-0.35. DSC demonstrates that in this region the process changes from an exothermic t...

The hydrogen and oxygen isotope ratios in hydrous minerals and volcanic glass are routinely used as paleo-proxies to infer the isotopic values of meteoric waters and thus paleo-climatic conditions. We report a series of long-term exposure experiments of distal 7700 BP Mt. Mazama ash ( 149& dH, +7 & dO, 3.8 wt.% H2O) with isotopically-labeled water (+650& dH, +56 & dO). Experiments were done at ...