Recent development in converting coal to clean fuels in China

Xu, Jian; Yang, Yong; Li, Yongwang

doi:10.1016/j.fuel.2014.11.059

Cited by 146 publications

(60 citation statements)

References 11 publications

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“…Sasol-Lurgi gasifier); 2) fluidized-bed (e.g. Kellog-Rust-Westinghouse gasifier); and 3) entrained flow (Texaco and Shell gasifiers) [58,59]. There are many differences between these gasifiers, but one of the primary ones is the composition of produced syngas.…”

Section: The Following Information Can Be Found In the Open Literaturmentioning

confidence: 99%

Role of water-gas-shift reaction in Fischer–Tropsch synthesis on iron catalysts: A review

2016

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Water-gas-shift (WGS) reaction plays a significant role in industrial application of Fischer-Tropsch synthesis (FTS) for coal-to-liquid (CTL) processes with iron-based catalysts. This reaction provides necessary hydrogen for synthesis gas with low H2/CO molar ratio, and has influence on concentrations of reactants, water and carbon dioxide, which in turn has effect on product distribution, rate of FTS and catalyst deactivation. We provide information on the effect of process conditions (H2/CO feed ratio, reaction temperature and pressure), syngas conversion, and catalyst composition and activation procedure on the WGS activity. H2/CO consumption (or usage) ratio and the exit H2/CO ratio vary with conversion and the extent of WGS reaction. The extent of variation is much greater for H2/CO feed ratios greater than 1.7, than it is for the CO rich syngas (H2/CO = 0.5-1). This in turn places limits on maximum practical single pass conversion which can be achieved with different feed compositions and results in different types of operation (low single pass conversion with tail gas recycle, and high once through single pass conversion).

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Section: The Following Information Can Be Found In the Open Literaturmentioning

confidence: 99%

Role of water-gas-shift reaction in Fischer–Tropsch synthesis on iron catalysts: A review

2016

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“…Coal is one of the most important energy and chemical sources in China, and the clean utilization of coal is very important for the development of society and economy. Coal gasification is one of the key technologies for the clean and efficient use of coal and can convert coal into electricity, syngas, and other valuable energy products, which is considered to be superior to conventional pulverized‐coal combustion for the reduction of hazardous emissions and has been greatly developed in China in recent years. More recently, some of the coal gasification plants have addressed not only the issue of carbon capture and sequestration but also poly‐generation strategies .…”

Section: Introductionmentioning

confidence: 99%

A study on the chemical state of carbon present in fine ash from gasification

Zhang

Gao

et al. 2019

Asia-Pacific J Chem Eng

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Taking feed coal as a reference, the chemical states, content changes, microstructure, distribution, and graphitizable extent of carbon present in gasification fine ash were investigated in detail. The results show that the fine ash includes a significant amount of unreacted carbon. The C1s spectrum is composed of four components in which the contents of C-C and C-H decrease dramatically and graphitized carbon (39.1%) presents. The elemental carbon primarily distributes on the layer structure, whereas elemental silicon and aluminum are mainly found on spherical particles embedded in the layer structure. After gasification, carbon atoms in gasification fine ash are arranged in an orderly manner, and the extent of graphitization of carbon increases, which indicates that carbon in feed coal may be partly graphitized and deposited in fine ash during gasification process.

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“…In 2015 alone, domestic coal tar production exceeded 10 million tons. 4,6,7 However, coal tar is a complex mixture, which contains a large number of important industrial products. 8 Since coal tar contains a lot of polycyclic aromatic hydrocarbons and hetero atoms, the extensive combustion will exert tremendous pressure on the environment, in addition, this has not achieved the rational utilization of coal tar.…”

Section: Introductionmentioning

confidence: 99%