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The use of biomasses is becoming increasingly appealing alternative, to give an partial solution lack of energy, with an ecofriendly approach, having on sugarcane a solid fundament; that receives the new and valuable complement of the innovative concept of the biorefineries it is productive installations, that can be summarized as to reach the higher overall yield from the raw materials, with the lowest environmental impact, at minimum energy input and giving the maximum of the energy output. The biorefinery is the true valuable option of a wide diversification, with by-products like the single cell protein and biogas from the distillery vinasse, new oxidants like methanol, second generation biofuels, biobutanol, etc. In this context this paper presents a study of five different configurations of biorefineries. Each case study being a system based on an autonomous distillery or sugar mill with an annexed distillery and coproduction of methanol from bagasse. The paper includes the use of sugarcane harvest residues (mainly straw) and a BIG-GT plant (Biomass Integrated Gasification-Gas Turbine) as alternatives to fulfill the energy demands of the complex. [ABSTRACT FROM AUTHOR]

Catalytic pyrolysisof biomass to prepare high-quality liquid fuels to assist carbon neutrality. [Display omitted] • The research progress of catalytic pyrolysis of biomass to produce liquid fuels and chemicals is reviewed. • The distribution of products is affected by raw materials, pretreatment, co-pyrolysis, reaction conditions. • The reaction mechanisms can be clarified from one-step, two-step and platform compounds transformation. • The advantages and limitations of various catalysts of biomass catalytic conversion are reviewed. • Catalytic conversion of biomass prospects and required further research are discussed. Considering the pressures of energy and the environment, using renewable resource—biomass to obtain hydrocarbon fuels and high-value chemicals has important application value and broad market prospects. However, due to the complex pyrolysis process of biomass, low calorific value, high oxygen content and strong acidity of bio-oil, the application of bio-oil as liquid fuel and chemicals are restricted. It is urgent to improve the quality of bio-oil. In this paper, the effects of biomass raw materials, pretreatment methods, co-pyrolysis of hydrogen donors and pyrolysis reaction conditions on the preparation of bio-oil by fast pyrolysis of biomass are described in detail. The article further discusses the research progress of biomass pyrolysis to prepare liquid fuel and high-value chemicals, including direct catalytic pyrolysis of biomass to prepare high-quality bio-oil, fast pyrolysis to prepare bio-oil and then catalytic upgrading, pyrolysis to prepare ketone and furan platform compounds, and then aldol condensation and catalytic hydrogenation. The main achievements and problems of three different synthesis techniques are reviewed objectively. Finally, the catalytic characteristics of catalysts are introduced by classification, and the specific applications and reaction mechanisms of different catalysts in catalytic pyrolysis, catalytic cracking and catalytic hydrogenation are systematically summarized, which provides a new direction for the research of lignocellulose biomass energy utilization. [ABSTRACT FROM AUTHOR]

Abstract: A great fraction of worldwide energy carriers and material products come from fossil fuel refinery. Because of the on-going price increase of fossil resources, their uncertain availability, and their environmental concerns, the feasibility of oil exploitation is predicted to decrease in the near future. Therefore, alternative solutions able to mitigate climate change and reduce the consumption of fossil fuels should be promoted. The replacement of oil with biomass as raw material for fuel and chemical production is an interesting option and is the driving force for the development of biorefinery complexes. In biorefinery, almost all the types of biomass feedstocks can be converted to different classes of biofuels and biochemicals through jointly applied conversion technologies. This paper provides a description of the emerging biorefinery concept, in comparison with the current oil refinery. The focus is on the state of the art in biofuel and biochemical production, as well as discussion of the most important biomass feedstocks, conversion technologies and final products. Through the integration of green chemistry into biorefineries, and the use of low environmental impact technologies, future sustainable production chains of biofuels and high value chemicals from biomass can be established. The aim of this bio-industry is to be competitive in the market and lead to the progressive replacement of oil refinery products. [Copyright &y& Elsevier]