What are the advantages of second generation biofuels?

The second generation of biofuels refers to the application model that moves away from using corn and other food crops as feedstocks to be converted into biofuels, and then uses agricultural and forestry wastes such as wheat straw, grass and wood as raw materials. main raw materials and uses biocellulose to transform it into biofuels. Fuel model for cellulosic ethanol development. Second generation biofuels have significant advantages over first generation biofuels. First, car engines can directly use gasoline or diesel blended with bioethanol without modification; second, the future of catalytic enzyme technology for second generation bioethanol production. Costs will decline rapidly in the coming years and large-scale industrial productionis very Third, cellulosic agricultural wastes such as straw exist in large quantities. For example, Chinese agriculture produces about 700 million tons of straw every year, and the supply is very sufficient. And in the long term, agricultural production waste can also be used to produce new biopolymer materials. Although second-generation biofuels have great advantages in reducing carbon emissions, they still cannot eliminate the fatal flaw of biofuels, namely their low energy density. Low energy density requires companies that produce biofuels to maintain a huge energy supply in the hinterland, and it remains unclear whether the energy consumption required to transport these raw materials can be fully offset by the fuel product. Furthermore, it is also difficult to estimateif agricultural waste such as straw, which should be returned to the earth's circle, is used to produce energy, will have an ecological impact and whether this impact will lead to ecological imbalance.