Author
Takayuki Takarada
Bio: Takayuki Takarada is an academic researcher from Tohoku University. The author has contributed to research in topics: Coal & Destructive distillation. The author has an hindex of 5, co-authored 5 publications receiving 403 citations.
Topics: Coal, Destructive distillation, Carbochemistry, Char, Ambient pressure
Papers
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TL;DR: In this article, the effect of coal rank on the gasification rate of coal char was examined and it was concluded that the surface active sites and/or the amount of exchangeable Ca and Na control the reactivity of low-rank coal chars in H2O.
236 citations
TL;DR: Shin-Yubari coal was impregnated with several catalysts of different chemical types during pulverization, and the relative activities of the catalysts were determined as a function of gasification temperature, catalyst loading and gasifying agent as discussed by the authors.
53 citations
TL;DR: In this paper, the catalytic steam gasification of 34 coals ranging from anthracite to peat was conducted in a thermobalance at 1023 K and the difference in the reactivities of coals with and without catalyst is taken as a measure of the catalyst efficacy, that of K2CO3 was found to be extremely large and almost independent of coal rank.
50 citations
Patent•
06 Oct 1987TL;DR: A process of catalytic coal gasification is characterized by mixing an inexpensive, low rank coal with an aqueous solution of inexpensive, widely existing alkali metal or alkaline earth metal chlorides, such as Nacl, KCl, or the like.
Abstract: A process of catalytic coal gasification characterized by mixing an inexpensive, low rank coal with an aqueous solution of inexpensive, widely existing alkali metal or alkaline earth metal chlorides, such as Nacl, KCl, or the like; adding a pH adjustor such as ammonia to the resulting mixture to adjust pH to 5˜12, whereby an ion exchange is effected between said metal and hydrogen in the coal, thereby loading only metals as a catalyst on the coal; washing the coal with water to remove chloride by-products; and running steam onto the catalyst-loaded coal at high temperatures and high pressures.
46 citations
TL;DR: In this article, the pyrolysis and steam gasification of nickel-loaded Yallourn coal were carried out in a fluidized bed reactor at ambient pressure, with the addition of nickel catalyst.
40 citations
Cited by
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TL;DR: Prediction of biochar stability was improved by a combination of volatile matter and H:C ratios corrected for inorganic C, and agronomic utility of biochars is not an absolute value, as it needs to meet local soil constraints.
816 citations
TL;DR: In this paper, a correlation was developed to predict the influence of ash on volatile yield, initial decomposition temperature and rate of pyrolysis in wood and twelve other types of biomass.
762 citations
TL;DR: The pyrolysis speciation revealed the competitive nature of the primary reactions and accelerated the reactions that led to the formation of low molecular weight species from cellulose as compared to those leading to anhydro sugars.
690 citations
TL;DR: In this paper, a brief review of the coal gasification with CO2 as a diluent is presented, where coal rank, pressure, temperature, gas composition, catalyst and the minerals present inside the coal, heating rate, particle size, and diverse reactor types.
451 citations
TL;DR: A review of recent progress in the understanding of the pyrolysis and gasification behavior of Victorian brown coal can be found in this article, where a brief account of the effects of AAEM species on the pyrotechnic yields of brown coal is given.
442 citations