Abstract
Gasification of peat and lignite under a focused light flow was observed in a wide range of fuel moisture (up to 65 wt.%). The initial water content in the fuels under study had a different influence on the chemical composition of the synthesis gas (syngas). At the same time, the effect of light intensity was more predictable: in general, the production of gases grew with it. It was shown that the gasification of peat accelerated greatly when light intensity exceeded 100 W/cm2. Moreover, the conversion of peat and lignite required an order of magnitude lower intensity of the light flow than was necessary for the conversion of bituminous coal processing waste. The dynamics of the sample weight changes demonstrated that contrary to bituminous coals, the process was not purely allothermal for both peat and lignite. However, the fuel smoldering was not self-sustainable and stopped shortly after the pumping light was turned off.
Highlights
Over recent years, human civilization has gone through a chain of energetic crises
The deficit of high-quality industrial fuels moves people to use widespread and low-demand fossil fuels and other raw materials earlier classified as waste [2,3,4]
The research presented the main aspects of the allothermal gasification of peat and lignite under a focused flow of incoherent light
Summary
Human civilization has gone through a chain of energetic crises. Some of them were caused by the conflicts of interests between the world’s centers of power, when the availability of oil and gas decreased significantly for many countries. There were some objective reasons for that, as well: an increase in the global population and the depletion of numerous readily available deposits of fossil fuels that were in use for a long time [1]. Using different types of domestic waste and biomass as fuel represents yet another way of replacing traditional fuels [5,6]. Using such quasi-renewable fuels through direct burning calls for a complicated modification of heaters and involves additional processing stages (like esterification) of the fuel. The new fuels and corresponding techniques of their application have to be environmentally friendly
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