Results 21 to 30 of about 23,540 (196)
Comparison of Combustion and Gasification between Crushed and Block Coals in UCG Model Tests
Journal of MMIJ, 2018 Small-scale underground coal gasification (UCG) model tests with a linking hole were carried out using two types of specimens made of either block coal or crushed coal to clarify their characteristics of combustion and gasification.
Jun-ichi KODAMA +7 more
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Revista de Direito Agrário e Agroambiental, 2016 It has become increasingly common legal provisions that expressly deal with future generations and their necessary protection. The combination of issues concerning future generations and agricultural activities, despite their undeniable relevance, has ...
Joaquim Basso
doaj +1 more source
INTERthesis, 2008 http://dx.doi.org/10.5007/1807-1384.2008v5n1p1 Visa o presente artigo discutir a importância das inovações tecnológicas como propulsoras do desenvolvimento econômico das nações, bem como o papel das políticas públicas voltadas para os agentes ...
Charlene Maria C. de Ávila Plaza +2 more
doaj +1 more source
Evaluation of Structural Changes in the Coal Specimen Heating Process and UCG Model Experiments for Developing Efficient UCG Systems [PDF]
Energies, 2013 In the underground coal gasification (UCG) process, cavity growth with crack extension inside the coal seam is an important phenomenon that directly influences gasification efficiency. An efficient and environmentally friendly UCG system also relies upon the precise control and evaluation of the gasification zone.
Faqiang Su +4 more
openaire +3 more sources
Investigation of Underground Coal Gasification in Laboratory Conditions: A Review of Recent Research
Energies, 2023 The underground coal gasification (UCG) technology converts coal into product gas and provides the option of environmentally and economically attractive coal mining. Obtained syngas can be used for heating, electricity, or chemical production.
Ján Kačur +3 more
doaj +1 more source
Monitoring of coal fracturing in underground coal gasification by acoustic emission techniques [PDF]
, 2017 During the underground coal gasification (UCG) process, fracturing and cracks occur inside the gasification zone and surrounding rocks as the underground coal cavity evolves.Although fracturing activity and crack extension directly affect gasification ...
Faqiang Su +3 more
core +5 more sources
Back-reaction of Cosmological Fluctuations during Power-Law Inflation [PDF]
, 2006 We study the renormalized energy-momentum tensor of cosmological scalar fluctuations during the slow-rollover regime for power-law inflation and find that it is characterized by a negative energy density at the leading order, with the same time behaviour
A. A. Starobinsky +14 more
core +2 more sources
Integration of production and financial models to analyse the financial impact of livestock diseases: a case study of Schmallenberg virus disease on British and French dairy farms [PDF]
, 2015 AIMS AND OBJECTIVES: The aim of the study was to investigate and compare the financial impact of Schmallenberg disease for different dairy production types in the United Kingdom and France.
Alarcon, P +4 more
core +1 more source
Acta Scientiarum: Biological Sciences, 2007 A fragmentação de hábitat causada pela ação humana vem sendo um dos grandes desafios para a biologia da conservação. A construção de estradas é um mecanismo de fragmentação de alto impacto, removendo a cobertura vegetal original, gerando efeito de borda ...
Tiago Rodrigues do Prado +2 more
doaj +1 more source
Detecting and monitoring UCG subsidence with InSAR [PDF]
, 2012 The use of interferometric synthetic aperture radar (InSAR) to measure surface subsidence caused by Underground Coal Gasification (UCG) is tested. InSAR is a remote sensing technique that uses Synthetic Aperture Radar images to make spatial images of surface deformation and may be deployed from satellite or an airplane.
Mellors, R J, Foxall, W, Yang, X
openaire +2 more sources