Results 51 to 60 of about 34,613 (225)

The Influence of Vibration on CaCO3 Scale Formation in Piping System

MATEC Web of Conferences, 2016
Carbonate scale is a common problem found in a piping system of industrial process. The presence of mechanical equipment such as turbine, compressor, blower, mixer and extruder produce a mechanical vibration on the piping system which is placed near ...
Mangestiyono W., Muryanto S., Jamari J., Bayuseno A.P.   +3 more
doaj   +1 more source

Accelerated and natural carbonation of concrete with high volumes of fly ash : chemical, mineralogical and microstructural effects [PDF]

, 2019
Today, a rather poor carbonation resistance is being reported for high-volume fly ash (HVFA) binder systems. This conclusion is usually drawn from accelerated carbonation experiments conducted at CO2 levels that highly exceed the natural atmospheric CO2 ...
De Belie, Nele, De Schepper, Mieke, Van den Heede, Philip   +2 more
core   +1 more source

Technobiological Pathways for High‐CO₂ Capture Using Micro‐/Macroalgae: Genetic Engineering, Process Automation, and Value‐Added Bioproducts

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Greenhouse gas (GHG) emissions have emerged as one of the most critical drivers of climate change; this is primarily due to high concentrations and long atmospheric life of carbon dioxide (CO2). For a significant amount of time, various biological processes such as microalgal cultivation, cyanobacterial systems, photosynthetic microorganisms ...
Sadhana Semwal, Harish Chandra Joshi
wiley   +1 more source

Heavy Alkyl-Benzene Sulfonate-Controlled Growth of Aragonite-Based Polymorphic CaCO₃ Crystals in Emulsion

Crystals, 2023
The non-natural mineralization of CaCO3 with special structures or morphologies is generated during the migration of crude oil and is the main form of scale in alkaline/surfactant/polymer (ASP) flooding in oilfields, adversely affecting oil recovery and ...
Weiwei He, Junqing Hu, Weihao Sun, Jiqiong Liu, Hongguang Guo, Changming Zhao, Qingguo Wang, Xiangbin Liu, Meng Cai, Weiguang Shi   +9 more
doaj   +1 more source

Bayesian separation of spectral sources under non-negativity and full additivity constraints [PDF]

, 2009
This paper addresses the problem of separating spectral sources which are linearly mixed with unknown proportions. The main difficulty of the problem is to ensure the full additivity (sum-to-one) of the mixing coefficients and non-negativity of sources ...
Bishop, Cardoso, Carteret, Chang, Cichocki, Comon, Comon, Cédric Carteret, Dandeu, de Juan, Djurić, Dobigeon, Dobigeon, Dobigeon, Févotte, Gelman, Gelman, Godsill, Hoyer, Hsiao, Hyvärinen, Jean-Yves Tourneret, Kitamura, Lee, Malinowski, Mazet, Miskin, Moussaoui, Moussaoui, Nicolas Dobigeon, Plumbley, Plumbley, Punskaya, Robert, Robert, Robert, Robert, Sajda, Saïd Moussaoui, Snoussi, Tugnait   +40 more
core   +5 more sources

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Sustainable Aragonite Production from Lime Feedstock Using Continuous Mineral Carbonation System and Seawater as a Natural Chemical Inducer

Applied Sciences
Conventional production methods of aragonite production utilize chemical inducers to promote the evolution of the calcite crystalline phase to the aragonite phase of calcium carbonate. The chemical inducers used require a considerable amount of magnesium
Mohammad Ghaddaffi Mohd Noh, Nor Yuliana Yuhana, Mohammad Hafizuddin Hj Jumali, Mohammad Syazwan Onn, Ruzilah Sanum   +4 more
doaj   +1 more source

Multi-frequency observations of seawater carbonate chemistry on the central coast of the western Antarctic Peninsula [PDF]

Polar Research, 2015
Assessments of benthic coastal seawater carbonate chemistry in Antarctica are sparse. The studies have generally been short in duration, during the austral spring/summer, under sea ice, or offshore in ice-free water.
Julie B. Schram, Kathryn M. Schoenrock, James B. McClintock, Charles D. Amsler, Robert A. Angus   +4 more
doaj   +1 more source

The time series at the Strait of Gibraltar as a baseline for long-term assessment of vulnerability of calcifiers to ocean acidification

Frontiers in Marine Science, 2023
The assessment of the saturation state (Ω) for calcium carbonate minerals (aragonite and calcite) in the ocean is important to determine if calcifying organisms have favourable or unfavourable conditions to synthesize their carbonated structures.
Silvia Amaya-Vías, Susana Flecha, Fiz F. Pérez, Gabriel Navarro, Jesús García-Lafuente, Ahmed Makaoui, I. Emma Huertas   +6 more
doaj   +1 more source

Structure of supercritically dried calcium silicate hydrates (C-S-H) and structural changes induced by weathering [PDF]

, 2013
The nanostructure of supercritically dried calcium silicate hydrates was researched. This particular drying procedure was used to avoid nanostructure modifications due to conventional drying processes.
Morales Flórez, Víctor, Rosa Fox, Nicolás de la   +1 more
core   +1 more source