Results 81 to 90 of about 56,415 (302)

Is “Race” Modern? Disambiguating the Question [PDF]

, 2020
Race theorists have been unable to reach a consensus regarding the basic historical question, “is ‘race’ modern?” I argue that this is partly because the question itself is ambiguous. There is not really one question that race scholars are answering, but
Hochman, Adam
core  

The Effect of Demineralization on Coal Functional Group Pyrolysis: Rank‐Dependent Dual Mechanisms of Structural Reorganization and Mineral Catalysis

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Coal pyrolysis, as a key thermochemical conversion process, is significantly influenced by inherent minerals, yet their role across different coal ranks remains inadequately understood. This study investigates the effect of acid‐washing (demineralization) on the thermal decomposition of six functional groups (aliphatic C–H, aromatic C–H/C=C, C=
Zhiyuan Niu, Guijian Liu, Hao Yin, Yang Song, Aifang Ding   +4 more
wiley   +1 more source

Contributions to Assessment and Remediation of Acid Tars Lagoons

Studia Universitatis Babes-Bolyai Chemia
Acid tars, a waste unique to the oil processing industry, pose a significant toxicity risk. These by-products originate from refining certain petroleum fractions, such as oil and paraffin, and are commonly found in the waste streams of crude oil ...
Mihaela NICOLAE (TITA), Ion ONUTU, Daniel TITA, Timur CHIS, Bogdan DOICIN   +4 more
doaj   +1 more source

In Situ Catalytic Pyrolysis of Low-Rank Coal for the Conversion of Heavy Oils into Light Oils

Advances in Materials Science and Engineering, 2017
Lighter tars are largely useful in chemical industries but their quantity is quite little. Catalytic cracking is applied to improve the yield of light tars during pyrolysis.
Muhammad Nadeem Amin, Yi Li, Xingmei Lu
doaj   +1 more source

Steam gasification of wood biomass in a fluidized biocatalytic system bed gasifier: A model development and validation using experiment and Boubaker Polynomials Expansion Scheme BPES

International Journal of Renewable Energy Development, 2015
One of the most important issues in biomass biocatalytic gasification is the correct prediction of gasification products, with particular attention to the Topping Atmosphere Residues (TARs).
Luigi Vecchione, Marta Moneti, Andrea Di Carlo, Elisa Savuto, Vanessa Pallozzi, Maurizio Carlini, Karem Boubaker, Leonardo Longo, Andrea Colantoni   +8 more
doaj   +1 more source

Methane Pyrolysis Performance in Catalytic Molten Media for Hydrogen Production From the Perspective of Bubble Column Reactor Design and Configuration

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT In the hydrogen production routes from natural gas (methane), methane pyrolysis offers a cleaner option than the established steam methane reforming by producing CO2‐free hydrogen. However, in fixed bed reactors over solid catalysts, this technology experiences rapid catalyst deactivation due to carbon (coke) deposition encapsulating its ...
Muhammad Irfan Fakarudin, Luqmanulhakim Baharudin, Matthew J. Watson, Wan Nor Roslam Wan Isahak   +3 more
wiley   +1 more source

DETERMINATION OF WATER CONTENT IN PYROLYTIC TARS USING COULOMETRIC KARL-FISHER TITRATION

Acta Polytechnica, 2017
The liquid organic fraction of pyrolytic tar has a high energy value which makes possible its utilization as an energy source. However, before utilization, it is crucial to remove water from the liquid fraction.
Lenka Jílková, Tomáš Hlinčík, Karel Ciahotný   +2 more
doaj   +1 more source

Origin and evolution of magnetars [PDF]

, 2008
We present a population synthesis study of the observed properties of the magnetars, which allows for X-ray selection effects, investigating the hypothesis that they are drawn from a population of progenitors that are more massive than those of the ...
Bałuci´nska-Church, Brun, Camilo, Colpi, Corbel, Dayal Wickramasinghe, Donati, Duncan, Faucher-Giguère, Featherstone, Ferrario, Figer, Foster, Geppert, Gill, Heger, Heger, Hünsch, Kaminker, Klose, Kouveliotou, Kouveliotou, Lilia Ferrario, Muno, Muno, Palmer, Perna, Petit, Pons, Vink, Vranes̆ević, Wilms, Zahn   +32 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

Catalytic Pyrolysis of Volatile Tars Contained in Gaseous Products of Fast Pyrolysis of Agricultural Waste

Chemical Engineering Transactions, 2016
The gases produced by fast pyrolysis method can be used as an alternative to fossil fuels. In order to use gaseous products of flash pyrolysis of carbon-containing biomass wastes effectively there is required its purification from resins.
Y.Yu. Kosivtsov, K.V. Chalov, Y.V. Lugovoy, E.M. Sulman, A.A. Stepacheva, V.P. Molchanov   +5 more
doaj   +1 more source