The Utilization of Fixed Bed Coal Gasification By-Products to Produce Combustible Gas by Auto-thermal Process

Abstract

Fixed bed gasification of coal generate some by-products, such as tar and coal powder. Coal powder obtained because the coal feed for fixed bed gasification reactor must have a size above 20 mm. Meanwhile, tar is a high molecular weight hydrocarbon compounds that will condense at low temperatures, which cause clogging and blocking of pipes. In this study, experiment on combustible gas generation from co-gasification of tar and coal powder was conducted in an auto-thermal reactor to determine the temperature of the process, combustible gas composition, and efficiency of the process. From calculation and experiments about oxidizing reactor operation, 20 kg/hr of tar was more promising to operate and can reach the optimal temperature which was 1900ºC. The energy from oxidizing reactor used for the reduction reaction of tar and pyrolysis of coal powder and produce combustible yield gas. The coal powder that can be conversion was about 14.4 kg/hr and produce approximately 84.52 kg/hr combustible gas. The calorific value of combustible yield gas amounted to 783.62 Cal/g. Combustible yield gas has advantages levels of hydrogen gas (H 2) as high as 19.2%, which is already exceeding the levels of hydrogen gas from coal gasification is only <10%. Cold gas efficiency (CGE) has a value which was still low at 26.31%. It is caused by two factors, namely the calorific value fuel gas produced was still low and the remainder of the conversion of coal powder were still mostly in the form of charcoal.

The Peluit Heat Utilization for Low-Rank Coal Upgrading

“…HTGR can be used for heat generation for supporting the cogeneration process and industrial electricity supply [2]. The cogeneration process includes heat supply for the chemical industry, steel [12], coal gasification/liquefaction [11], oil mine [18], coal drying, hydrogen production, and desalination. Based on this fact, Peluit can be used as a supporting power in industrial areas in Indonesia through cogeneration conceptual design for coal drying of Peluit (See Figure 1).…”

“…desalination, enhance oil recovery, coal upgrading, coal gasification/ liquefaction, hydrogen production, etc. [11], [12].…”

A Review of Preliminary Experimental Factors of Making Geopolymer Paste as a Passive Fire Protection System

“…In addition to these two methods, geopolymerization is a new method of making bricks that could solve the problems of previous methods. Additional considerations regarding the geo-polymerization method are the use of waste material [13,14].…”