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· Calcium looping can be used in various environmental applications such as post-combustion CO 2 capture, sorption-enhanced reforming and thermochemical energy storage. The calcination reaction mechanism and the effect of CO 2 partial pressure have not been fully clarified yet justifying further efforts; this work focuses on kinetic modeling of the reaction.
أكمل القراءةCalcination-free production of calcium hydroxide at sub-boiling temperatures†. Sara Vallejo Castaño ab, Erika Callagon La Plante acd, Sho Shimoda a, Bu Wang e, Narayanan Neithalath f, Gaurav Sant * acgh and Laurent Pilon * bc a Laboratory for the Chemistry of Construction Materials (LC 2), Department of Civil and Environmental Engineering, University of California, …
أكمل القراءة· The rest of hydrophobic moiety of the surfactant can be removed by calcination [32], or any other appropriate method such as washing etc. …
أكمل القراءة· It is evident herein that the value of surface area of the used catalyst is lower than the corresponding value for fresh sample. The relative reduction of the BET surface areas for the used and fresh catalysts is attributed to deposition of carbon. The BET value for used catalyst decreased with the increase of the calcination temperatures.
أكمل القراءة· Background The discard of used adsorbents may pose a great threat to human health and ecological environment. This work herein reported a facile and feasible method, with aims of (i) reusing the calcined layered double hydroxide (CLDH) adsorbent after azo dye adsorption, and (ii) being further used as a photocatalyst to enhance the degradation of typical …
أكمل القراءةHerein, calcination kinetics of limestone were studied experimentally in a fixed-bed reactor, and theoretically using different models previously reported in the literature.
أكمل القراءة· Herein we report microwave method followed by a pyrolysis of the as-prepared precursor is used to synthesize porous nickel cobaltite microspheres. ... was carried out to determine the calcination ...
أكمل القراءة· ,SCI。,,。1,coverlettercoverletter,。,, ...
أكمل القراءة· Further calcination of the Au/MgO-con sample at higher temperature (for example, 500 or 700 °C in air for 3 h) leads to enhanced sintering of gold particles with undetectable overlayer coverage ...
أكمل القراءة· Supported metal catalysts have been widely used in the industrial catalysis process because of their adequate active sites and high atom utilization 1,2,3,4,5.Recently, nanoengineering has been ...
أكمل القراءةAs used herein, the Diffusion Parameter of a particular porous crystalline material is defined as D/(r 2 ×10 6), wherein D is the diffusion coefficient (cm 2 /sec) and r is the crystal radius (cm). The required diffusion parameters can be derived from sorption measurements provided the assumption is made that the plane sheet model describes ...
أكمل القراءةAbstract. Calcium hydroxide (Ca(OH) 2), a commodity chemical, finds use in diverse industries ranging from food, to environmental remediation and construction.However, the current thermal process of Ca(OH) 2 production via limestone calcination is energy- and CO 2-intensive.Herein, we demonstrate a novel aqueous-phase calcination-free process to precipitate Ca(OH) 2 from …
أكمل القراءة· Covalent organic frameworks (COFs) used as supports for metal nanoparticles (MNPs) show high efficiency in heterogeneous catalysis. Developing a green and efficient way to synthesize COFs remains a great challenge. Herein, an imine COF (TpPa-1 ...
أكمل القراءة· Herein, we reported the ... Compared with the traditional hydrothermal method, the template-etching-calcination method used less calcination time to prepare CuCrO 2 nanocrystals. After the CuCrO 2 interface modification, the efficiency of PSCs improved from 18.08% to 20.66%. Additionally, ...
أكمل القراءة· Herein, we reported a magnetic field-enhanced, bifunctional Ni 3 Fe/wood carbon electrode (Ni 3 Fe-CW) for efficient overall water splitting. Wood with numerous porous channels allows high loading of metal ions via the hydrothermal method, while the following high-temperature calcination leads to well-dispersed and uniform Ni 3 Fe nanoparticles, which are …
أكمل القراءة· The phrase "controlled coarsening" as used herein refers to increasing the percentage of coarsened particles throughout the particle size range of 0.5 to 2 microns. So-called "flash" or "shock" calcination is used to produce relatively coarse kaolin derived pigments.
أكمل القراءة· Herein, calcination conversion of the sludge into magnetic adsorbent was investigated. The sludge was directly calcinated at three different conditions, where the products were characterized by ...
أكمل القراءةHerein, three-dimensional cobalt organic phosphate (COP) nanoflake precursors were obtained by a simple self-assembly method. Further, COP assemblies were obtained via the low-temperature calcination activation of the precursors in air, and the obtained assemblies preserved the nanoflake structure of the precursors by exposing an increased ...
أكمل القراءة· Okara is a by-product of tofu manufacturing and is usually used as a feedstuff. Herein, we developed a methodology of using okara as a carbon source for the preparation of photothermal nano-materials. It's interesting to find that …
أكمل القراءةThis work herein reported a facile and feasible method, with aims of (i) reusing the calcined layered double hydroxide (CLDH) adsorbent after azo dye adsorption, and (ii) …
أكمل القراءةA method for forming hollow silica spheres by dissolving a hydrolyzable aryl silane in an aqueous solution of water and an acid to form a hydrolyzed silane solution, mixing the hydrolyzed silane solution with a hydroxide base to form a precipitate, and calcining the precipitate in a multi-stage calcination procedure that includes (a) heating to a first temperature of 180 to 240° C. with a ...
أكمل القراءةHerein, olivine LiFePO 4 covered with graphene and carbon layers is prepared via a sol-gel method, followed by calcination, and the resultant composite is used as a cathode material in aqueous rechargeable lithium-ion batteries (ARLBs). The phase structure and morphology of the composite are characterized via X-ray diffraction (XRD), transmission electron microscopy …
أكمل القراءةThe term "limestone" as used herein refers to CaCO 3 and any limestone-containing material, such as dolomite. The term "lime" refers generally to the calcined limestone products, e.g. CaO or dolime. There are many processes which require Ca(OH) 2 as a raw material.
أكمل القراءة· Herein, carbonized melamine s obtained through one-step calcination were first used as integrative solar absorbers (ISAs) for water evaporation, realizing highly efficient solar steam generation. The optimized ISA shows excellent light absorption ...
أكمل القراءة· Orbite Shuts down Operations at its HPA Plant due to problems with Outotec Calcination Equipment. June 21, 2019 ... (Definitions of the capitalized terms used herein can be found at the end of ...
أكمل القراءةHerein, the porous Ni/NiO/CNFs were fabricated by electrospinning combined with vacuum calcination and etching technology. Porous Ni/NiO/CNFs with different electromagnetic (EM) parameters and impedance matching could be easily obtained by adjusting the calcination temperature. On account of the synergistic loss mechanism composed of magnetic ...
أكمل القراءة(As used herein, the term "calcination" is normally meant to include all calcination heating of diatomite, whether or not fluxes are also present. Where either flux calcining or non-flux calcining are individually meant, they will be so identified.)
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