نتایج جستجو برای: coal bed

تعداد نتایج: 80402  

2007
Andrew Seltzer

Oxyfuel-firing of a steam boiler is a low risk high-efficiency technique for CO2 capture in a power plant. Oxyfuel-firing can be readily adapted to a new power plant or to retrofit applications. Development and design of pulverized coal and circulating fluidized bed oxyfuel boilers and balance of plant equipment have been conducted to identify the required specific features, which will maximize...

Journal: :Energies 2023

With an increasingly tight supply of world energy resources, unconventional oil and gas including shale gas, coal-bed sandstone have attracted much attention [...]

2014
A. Arenillas C. Pevida F. Rubiera J. M. Palacios R. Navarrete R. Denoyel J. Rouquerol

Knowledge of surface properties is essential for understanding the reaction mechanisms involved in several coal conversion processes. However, due to the complexity and heterogeneity of coal this is rather difficult and the use of known model compounds could be a valuable tool. Single model compounds have been widely used, but they give a quite simplified picture. In this work a mixture of mode...

2014
Wen Hao Chen Sam Y. S. Yang Ti Qiao Xiao Sherry C. Mayo Yu Dan Wang Hai Peng Wang

Quantifying three-dimensional spatial distributions of pores and material compositions in samples is a key materials characterization challenge, particularly in samples where compositions are distributed across a range of length scales, and where such compositions have similar X-ray absorption properties, such as in coal. Consequently, obtaining detailed information within sub-regions of a mult...

2014
L L Sloss

Blending of imported and domestic coal is becoming of increasing importance. Until recently, coal blending in power stations was mainly adopted to reduce the cost of generation and increase the use of indigenous or more readily available coal. Low-grade (high ash) coal can be mixed with higher grade (imported) coal without deterioration in thermal performance of the boiler, thus reducing the co...

2014
N. Muda M. H. Boosroh

This paper investigates the synergistic interaction in a gasification of coal and petcoke blends in a 150 kWth pilot scale gasification plant. Petcoke was used either in combination with coal or separately to produce syngas in an atmospheric fluidized bed gasifier using air as gasifying agent. Syngas composition and carbon conversion efficiency were recorded and calculated. The results show tha...

2015
V. Gomathi

In early decades, rescue operation in coal mine was treated as a dangerous task. After explosions occur, when rescue workers get into the tunnel without environment conditional awareness, they are facing heavy damages due to consecutive explosions [1]. This bring the necessity to detect the status of the mine environment details such as toxic gases, high temperatures through wireless sensors to...

Journal: :Environmental pollution 2012
Nan Jia Liguang Sun Xin He Kehua You Xin Zhou Nanye Long

The distribution of antimony (Sb) in topsoil and moss (Dicranum angustum) in disturbed and undisturbed areas, as well as coal and gangue, in Ny-Ålesund, Arctic was examined. Results show that the weathering of coal bed could not contribute to the increase of Sb concentrations in topsoil and moss in the study area. The distribution of Sb is partially associated with traffic and historical mining...

2010
R. Grana S. Sommariva T. Maffei A. Cuoci T. Faravelli A. Frassoldati S. Pierucci E. Ranzi

This work presents a general mathematical model of a fixed bed gasifier, where both the transport resistances and the chemical kinetics are important at the reactor and the particle scale. Pyrolysis and gasification of the solid fuel (coal, plastics, biomasses or wastes) is only the first step of the whole process. Successive gas phase reactions of the released species are described with a deta...

2008
Fei Wang Fanxing Li Andrew Tong Deepak Sridhar Liang-Shih Fan

The syngas chemical looping (SCL) process developed at the Ohio State University can efficiently convert coal derived syngas into hydrogen with in-situ CO2 capture. In this novel process, two moving bed units are used to convert syngas into hydrogen through the assistance of an oxygen carrier particle. A third unit, an entrained bed combustor, is used to convey the oxygen carrier particles to c...

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