Results 51 to 60 of about 27,111 (219)

Unidades de produção agrícola controlada no semiárido para o tratamento de água cinza

Revista Verde de Agroecologia e Desenvolvimento Sustentável, 2013
As reservas de água doce, juntamente com as limitações de lançamento de efluentes no meio ambiente, culminam para a necessidade do uso racional dos recursos hídricos de modo a reduzir os impactos negativos da geração de efluentes.
Aline Costa Ferreira, Viviane F. Silva, José G. de V. Baracuhy, Vera L. A. de Lima   +3 more
doaj   +2 more sources

Small-scale Properties of Atomic Gas in Extended Disks of Galaxies

, 2014
We present high-resolution HI 21 cm observations with the Karl G. Jansky Very Large Array (VLA) for three HI rich galaxies in absorption against radio quasars. Our sample contains six sightlines with impact parameters from 2.6 to 32.4 kpc.
Borthakur, Sanchayeeta, Bowen, David V., Heckman, Timothy M., Momjian, Emmanuel, Tripp, Todd M., York, Donald G., Yun, Min S.   +6 more
core   +1 more source

Visualization of Movement and Expansion of Coal Reaction Zone by Acoustic Emission Monitoring in Underground Coal Gasification System

Eng, 2023
Underground coal gasification (UCG) is the process of directly recovering energy as combustible gases such as hydrogen and carbon monoxide by combusting unmined coal resources in situ.
Rika Iriguchi, Yuma Ishii, Akihiro Hamanaka, Faqiang Su, Ken-ichi Itakura, Jun-ichi Kodama, Takashi Sasaoka, Hideki Shimada, Gota Deguchi   +8 more
doaj   +1 more source

Estrutura espacial de Duguetia furfuracea (A. St.-Hil.) Benth. & Hook. (Annonaceae) e os fatores condicionantes em um campo-cerrado no municipio de Caiaponia, GO, Brasil

Bioscience Journal, 2007
Vários fatores ambientais são responsáveis pela estruturação das populações vegetais e animais, influenciando sua dinâmica ao longo do tempo e espaço. O presente estudo tem por objetivo identificar a estrutura espacial de D. furfuracea (Annonaceae) em um
Matheus de Souza Lima-Ribeiro
doaj  

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

Integrated analysis of geofiltrational parameters in the context of underground coal gasification relying upon calculations and modeling [PDF]

, 2018
Objective of the paper is to substantiate and implement the integrated approach aimed at the studies of filtration and mass-transfer processes within roof rocks of coal seams in the context of their underground ...
Dereviahina, Nataliia, Inkin, Oleksandr, Sotskov, Vadym, Tishkov, Volodymyr, Инкин, А. В., Инкин, Александр Викторович, Інкін, О. В., Інкін, Олександр Вікторович   +7 more
core   +1 more source

Geological evaluation and favorable area optimization for underground coal gasification in Zhalainuoer coal field

Meitan xuebao
Underground coal gasification (UCG) can control the combustion of in-situ coal seams underground to obtain combustible synthesis gas, which is expected to become an important way to fill the gap in natural gas supply and demand in China.
Yi CUI, Shu TAO, Zhiheng WANG, Yaning WU, Qinghe JING, Shoujun LI, Dejun LI, Jie GUO, Shouqing YAN, Yang JIAO, Di ZOU   +10 more
doaj   +1 more source

CO2 Sequestration in UCG

, 2013
The most commonly applied UCG designs are Linked Vertical Wells (LVW) and Controlled Retracting Injection Point (CRIP). In the CRIP process, the production well is drilled vertically, and the injector is drilled horizontally close enough to the producer to have considerable flow connection.
openaire   +2 more sources

Strata Movement Characteristics in Underground Coal Gasification (UCG) under Thermal Coupling and Surface Subsidence Prediction Methods [PDF]

, 2023
Xiaopeng Liu, Liangji Xu, Kun Zhang
openalex   +1 more source

Early Ideas in Underground Coal Gasification and Their Evolution

Energies, 2009
This article follows the development of early UCG (underground coal gasification) ideas. Historical facts are discussed mainly from the technological perspective and early experiments in UCG are analyzed.
Alexander Y. Klimenko
doaj   +1 more source