Energy can be classified according to their shape: solid fuels, liquid fuels, gaseous fuels. By forms of energy can be divided into chemical energy, hydro, nuclear, power, solar, biomass, wind energy, ocean energy and geothermal energy. From the impact on the environment into clean energy and non-clean energy, the former can also be called "green" energy. "According to whether renewable energy into renewable energy and non-renewable energy sources. Developed by using forms of energy can be divided into primary energy and secondary energy.
With the rapid growth of China's economy, dominated by fossil fuel energy consumption has increased dramatically, the pressure on the environment is also growing. 2003, China reached 823 million tons of carbon dioxide emissions, ranking second in the world, more than 20 million tons of sulfur dioxide emissions, ranking first in the world, acid rain has accounted for more than 30% of the land area. After 2005, China has overtaken the United States carbon dioxide emissions ranked first in the world. 70% of China's carbon dioxide emissions, 90 percent of sulfur dioxide emissions, nitrogen oxide emissions from coal-thirds were. With increasing pressure from the protection of the environment, the implementation of energy conservation, promote low-carbon life is imperative. China as a great power consumption, and more assume a pivotal role. March 8, 2011, China announced this year, industrial energy conservation binding targets: Chinese energy consumption per unit of industrial added value, carbon dioxide emissions in 2010 were lower than 4%, more than 4%.
In the above context of the international energy situation, biomass growing at rapid trend of rapid development. Biomass is fixed by the solar plant photosynthesis on Earth, most likely to become one of the major new energy in the 21st century. It is estimated that the energy storage plant each year the world's major fuel consumption equivalent to about 10 times; but as the amount of energy use is less than l% of its total. Can efficiently utilize biomass energy through biomass conversion technology, instead of fossil fuels, thereby reducing dependence on fossil energy, reduce pollution to the environment caused by energy consumption.
Experts believe that biomass energy will become an important part of future sustainable energy, to 2015, the world's total energy consumption will be 40% from biomass sources. Biomass energy has the following characteristics: renewable, high calorific value resistance, low pollution, zero-emission, high-density and so on. Curing of biomass is a form of biomass energy development and utilization.