Abstract
The utilization of Indonesia low rank coal should be maximized, since the source of Indonesia law rank coals were abundant. Pyrolysis of this coal can produce liquid product which can be utilized as fuel and chemical feedstocks. The yield of liquid product is still low due to lower of comparison H/C. Since coal is non-renewable source, an effort of coal saving and to mitigate the production of greenhouse gases, biomass such as oil palm empty fruit bunch (EFB) would added as co-feeding. EFB could act as hydrogen donor in co-pyrolysis to increase liquid product. Co-pyrolysis of Indonesia low rank coal and EFB were studied in a drop tube reactor under the certain temperature (t= 500 °C) and time (t= 1 h) used N2 as purge gas. The effect of blending ratios of coal/EFB (100/0, 75/25, 50/50, 25/75 and 0/100%, w/w %) on the yield and composition of liquid product were studied systematically. The results showed that the higher blending ratio, the yield of liquid product and gas obtained increased, while the char decreased. The highest yield of liquid product (28,62 %) was obtained used blending ratio of coal/EFB = 25/75, w/w%. Tar composition obtained in this ratio is phenol, polycyclic aromatic hydrocarbons, alkanes, acids, esters.
Highlights
Indonesia coal reserves in 2015 reached 126.61 billion tons, and about 80% of coal reserve was low rank coal.Lignite is a type of coal that is classified as low rank coal due to it has high water content and low caloric value[1]
The product yields from the co-pyrolysis of low rank coal and empty fruit bunch (EFB) at different blending ratios and yield of tar at temperature 500 ̊C are given in Fig.3 and 4, The product yields are calculated by : Yield of char=
The results showed that the higher blending ratio, the yield of liquid product and gas obtained increased, while the char decreased
Summary
Indonesia coal reserves in 2015 reached 126.61 billion tons, and about 80% of coal reserve was low rank coal. A study on copyrolysis of biomass legume straw (LS) and lignite coal in a drop tube reactor from 500 to 700 ̊C, the results shown a trend towards linear product distributions at higher temperatures. Study of biomass pyrolysis, such as rapeseed were conducted to determine the effect of pyrolysis, such as temperature, heating rate, particle size and gas flow rate on the pyrolysis product yields and their chemical compositions. The results of this experiment showed that the liquid yield product reached a higher of 68% by employing higher heating rate of 300 ̊C min-1 under temperature of 550 ̊C and particle size range of 0.6 – 1.25 mm. Identification of components in tar was done by gas chromatography/mass spectrometry (GC–MS)
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