Open AccessBiochar production investigation from pyrolysis of lamtoro wood as a coal blend for fuel substitution in steam power plants
Author(s) -
N. Nurhadi,
Sapta Rianda,
Cipta Irawan,
Gatut Pujo Pramono
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/749/1/012037
Subject(s) - biochar , pyrolysis , heat of combustion , coal , carbon fibers , pulp and paper industry , materials science , bituminous coal , charcoal , chemistry , waste management , organic chemistry , composite material , composite number , engineering , combustion
The biochar utilization reduces CO 2 emissions. This study aims to investigate the optimum pyrolysis temperature of lamtoro wood ( Leucaena leucocephala ) to produce suitable biochar for coal blends as fuel in the steam power plant. The experiment was carried out in a batch process, applied to a fixed bed reactor, 10°C/minute heating rate, three different variables temperature (300, 450, 600°C), and 60 minutes residence time. The biochar yield for each pyrolysis temperature is 61.77%, 26.45%, and 24.89%. This shows that the pyrolysis is carried out at a temperature of 300 to 450 °C, then ramps up to 600 °C. The volatile matter was released during the pyrolysis and raise the fixed carbon content. The fixed carbon content for each pyrolysis temperature is 26.35%, 61.82%, and 65.66%. Fixed carbon content at 450 and 600 °C identical to bituminous coal. The increase in fixed carbon content in biochar leads the heating value to increase. The heating value of lamtoro wood was 19.15 MJ/kg (db), increasing to 22.92, 28.01, and 29.73 MJ/kg (db) for each pyrolysis temperature. The biochar heating value is close to bituminous coal. The biochar energy content of original lamtoro wood for each pyrolysis temperature is 81.72%, 42.77%, and 42.71%. Biochar reaches its optimal point at pyrolysis temperature 450 °C, which has a yield and heating value almost the same at pyrolysis temperature of 600 °C. The biochar characterization results indicate that it can be used as a coal blend for steam power plants.