Alya Naili Rozhan

Innovative Process to Enrich Carbon Content of EFB-Derived Biochar as an Alternative Energy Source in Ironmaking

This paper describes the mechanism of a developed process—an integrated pyrolysis-tar decomposition process—to produce oil palm empty fruit bunch- (EFB-) derived biochar with additional solid carbon within the biochar bodies, produced by decomposition of tar vapor on its pore surface, using the chemical vapor infiltration (CVI) method. The product, carbon-infiltrated biochar, was characterized to investigate the possibility to be used as partial coke breeze replacement in ironmaking. Carbon-infiltrated biochar is proposed to be utilized for a sintering process that could reduce the consumption of coke and CO2 emission in iron-steel industry.

Enhancement of oil palm empty fruit bunch char by impregnation of pyrolytic carbon from tar vapor decomposition

This paper describes a technology for condensable vapor from pyrolysis (often referred to as “tar”) of oil palm empty fruit bunch, EFB, to be collected—by EFB char substrate—in the form of pyrolytic carbon to produce a value-added EFB char and to make EFB able to be utilized as a supplementary solid fuel. Chemical vapor infiltration method was employed at atmospheric pressure for tar vapor to undergo secondary decomposition to produce pyrolytic carbon to be deposited within porous char. Porous char in a packed bed was used as the substrate, and impregnated with pyrolytic carbon using tar vapor as a reactant. Char substrate was prepared by slowly heating coarse EFB particles in the packed bed to 400 °C in nitrogen atmosphere. Tar vapor was obtained from fast pyrolysis of fine EFB particles at 400–700 °C, and the weight ratio of fine EFB particles—the tar source—to char substrate was increased from 0.5 to 4.0. The amount of carbon contents of the resultant products by this process was compared to those with...

Development Process For Tar Filtering From Biomass Pyrolysis

This paper presents a new approach for recovering tar produced from the biomass pyrolysis process. Pyrolysis is a promising thermochemical process to utilize biomass to produce gas, char and tar. Tar is a vapour/liquid product containing carbon, and it is often found in producer gas. It needs to be recovered from gas mixture to upgrade its value for the tar to be utilized on its own as a fuel source. In this developed process, steelmaking slag and low-grade iron ore were made porous by the dehydration process, and were then introduced as a tar filter to trap tar produced during biomass pyrolysis. The purpose of this work is to investigate the possibility of using porous materials for tar filtering during the pyrolysis process. Tar vapour infiltrates the porous materials and then decomposes into carbon and gases, where carbon is deposited on the pore surface. Clean gas can be collected and tar can be recovered before being utilized as a renewable energy source by itself. After the trapping process, carbon was found to be deposited within the porous material. The product of the tar filtering will be carbon-deposited material – a potential candidate to be used as a renewable fuel source.