Energy is a fundamental necessity of daily life. Nowadays, dependence on fossil fuels for energy needs is decreasing in many countries due to the potential of renewable energy to provide sustainable energy to the huge populations of many developing countries that lack clean, continuous energy. Generally speaking, renewable energy can be defined as energy derived from constantly renewed and theoretically inexhaustible natural resources. Fossil fuels, on the other hand, can be described as energy that cannot be renewed and will eventually decline. Thus, in many developing countries, renewable energy constitutes the alternative energy to replace non-renewable energy or commonly known as fossil fuels. Furthermore, according to Sorensen (2004), there is a greater demand for renewable energy sources today due to the uncertainty of increasing fuel prices and living costs. There are generally many types of renewable energy available in our world, such as wind energy, biomass energy, solar energy, hydroelectric energy and geothermal energy. However, the three main examples of renewable energy are hydroelectric energy, solar energy and biomass energy (see Figure 1 in Annex 1). The first type of renewable energy is hydroelectric energy or well known as hydroelectricity. In Greek, hydro means water and therefore hydroelectric power refers to electricity produced from water flowing at high speed. Lutgens and Tarbuck (1992, p. 163) stated that "running water is of great importance to people because we depend on rivers for energy, travel, and irrigation." The continued availability of water in the universe has made water the primary source of hydroelectric power. Water has been widely used by humanity since the beginning of civilization and water...... middle of paper ......ch is used to replace natural gas. He also said that among the equipment used to burn biofuel, the suspension burner has the ability to achieve efficiency above 99% and the whole tree burner can reduce the cost of harvesting and handling wood fuels. 'around 35% (Brown, 2003). In addition, the long-term use of bioenergy aims to ensure a certain ecological balance and combat climate change, avoid acid rain, reduce soil erosion and minimize water pollution ( Gevorkian, 2007). Biomass is therefore environmentally friendly, just like solar energy. Based on the research carried out on the synthesis of gas from biomass, the gas gasifies in the internal combustion engine. The relative energy density of syngas is higher than that of fossil fuel under certain conditions. Additionally, the relative flame speed of the syngas can reduce the spark ignition time..