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ISBUC Proposal : Status and Alternatives

ISBUC Proposal : Status and Alternatives. Manoel Regis Lima Verde Leal CENEA-Ceará NIPE/UNICAMP. III ISBUC Meeting Mauritius, June 29-July 3, 2009. ISBUC Objectives. To promote research to convert sugarcane biomass into value-added products;

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ISBUC Proposal : Status and Alternatives

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  1. ISBUC Proposal: Status and Alternatives Manoel Regis Lima Verde Leal CENEA-Ceará NIPE/UNICAMP III ISBUC Meeting Mauritius, June 29-July 3, 2009

  2. ISBUC Objectives • To promote research to convert sugarcane biomass into value-added products; • To establish collaboration among research providers; • To use the input of sugar companies and other stakeholders to direct research priority for maximum benefit.

  3. ISBUC Meetings • Preliminary Planning Meeting: South Africa (July 2006) • Regular Meetings Maceió, Brazil (November 2006) Durban, South Africa (August 2007) • Products Two proposals for project development: Vinasse: life cycle analysis and cost assessment of different methods for its disposal BIG/GT: Design, construction and evaluation of a sugarcane biomass gasification pilot plant with 3 MW

  4. BIG/GT Proposal(1) • Objective To design, construct and extensively test a 3 MWe BIG/GT bagasse/trash fueled power plant in a sugar mill for the evaluation and improvement of the technological drawbacks of this technology at industrial scale. • Specific Objectives .To evaluate a fluidized bed industrial gasifier (mainly feeding system, efficiency and gas cleaning). .To evaluate the operation of a gas turbine adapted to low calorific value gas use. .To establish the BIG/GT system real operating achievable efficiency and the potential for improvement. .To identify, evaluate and solve the main operational problems of the system. .To calculate the BIG-GT system economic indicators and perform technical-economic analysis.

  5. BIG/GT Proposal (2) Justification • The necessity of a first industrial pilot scale test facility to progress toward commercial implementation of this technology. • The high cost of the first industrial prototype makes international funding and collaboration necessary. • High efficiency electricity generation is extremely important in the actual context of a diversified food and energy producing sugarcane industry, • Among ISBUC members there are research institutions and groups with expertise in bagasse gasification and BIG/GT system modeling.

  6. Feedback to ProposalVinasse • Apparently no interest • It is only important to large scale ethanol producers

  7. Feedback to ProposalsBIG/GT • Why BIG/GT? Hydrolysis, two stage gasification, other. • Why electricity and not biofuels and other products? • Why 3 MW? See the GT’s available for low BTU gas and decide. • Some important points need clarification and justification: why is BIG/GT needed? Why was it chosen? Will it be attractive to mill owners? Business case; Project Plan; high fiber cane; Capital and operating costs; Revenues; Economic analysis; What happened to other demo plants? • Two stage project: Feasibility study and development of detailed design and cost estimates.

  8. Questions to Be Answered • Are 2nd G technologies really better than 1st G • What are the alternatives? • Which is closest to commercial stage? • What is the economy of scale? • Why a demo plant? • What size and where? • What funds will be needed to make it profitable? • Where to go for funding? • Investment, operating costs and revenues? • What is the expected learning curve? • Energy cane, what should it look like? • Sugarcane trash availability, quality and cost?

  9. New Topics For Consideration • The future of sugarcane industry • How much can we get from sugarcane • Final products • The cane of the future • Maximum use of sugarcane biomass

  10. Sugarcane Today • Feedstock for food industry • Breeding aiming at increase in sucrose/ha • Fiber: bagasse used inefficiently and trash is wasted • Very few countries have focus on energy as an important product Brazil: ethanol Mauritius: electricity

  11. BRAZILIAN AVERAGE DISTILLERY(2005) • Factory conditions . Steam conditions: 22 bar/300 ºC . Process steam consumption: 500 kg/tc (330 kWh/tc) . Mechanical energy consumptions: 16 kWh/tc . Electricity consumption: 12 kWh/tc . Plant overall efficiency: 84% . Surplus power generations: 0 . Surplus bagasse: 8% • Sugar cane characteristics (Macedo, 2004) . Pol % cane: 14.5 . Fibre%cane 13.5 . Reducing sugars%cane 0.56 . Cane productivity 68.7 t/ha/yr (82.4 t/ha harv.) TRS=158 kg/tc resulting in 86 l ethanol/tc

  12. Primary Energy of Sugarcane (2005) ComponentEnergy (MJ) 150 kg of sugars 2,500 135 kg of stalk fibres 2,400 140 kg of leaf fibres 2,500 Total 7,400 68.4 tc/ha/yr 510 GJ/ha/yr (12.1 toe)

  13. Energy Recovery (2005) 1 tonne of clean stalks ProductsEnergy (MJ) 86 L ethanol 2,000 80 kWh 290 Total 2,290 Recovery efficiency = 30.9%

  14. Driving Forces For ISBUC • The potential to increase energy recovery; • The potential to increase revenues; • The future of sugarcane industry: the energy concept; • The importance of reducing GHG emissions;

  15. Sugarcane Evolution in Brazil • Conventional breeding 1975 – 2000: +33% yield and +8%Pol 2000 - 2020: same annual improvement • Conventional distillery Steam conditions (bar/0C): 22/300 to 85/520 Process steam (kg/tc): 500 to <340 Process efficiency (%): 84 to 90

  16. The Future Possible deviations from BAU scenario • GM sugarcane; • Maximum use of sugarcane biomass; • Second generation biofuels from fiber; • Energy cane.

  17. Objectives of the III ISBUC Meeting To decide the future steps • Which technology to pursue; • The concept of the joint effort proposal: Objective Structure Responsible group Time schedule • What to take to XXVII ISSCT Congress.

  18. Final Comments (1) • Sugarcane is a food feedstock but it is the best biofuel feedstock • Sugarcane to energy cane transition -Phase 1: adapt present technology and cane varieties to maximize energy products -Phase 2: breed cane for energy and combine first and second generation technologies for maximum energy recovery and minimum cost

  19. Final Comments (2) Long term view : two routes -Food industry with energy co-products: conventional sugarcane breeding and processing -Energy industry: energy cane with integrated first and second generation technologies; trash and gasification will be key players

  20. Final Comments (3) KEY ISSUES • Green cane harvesting with trash recovery • Energy cane breeding • Energy cane harvesting • Energy cane processing: new paradigm • Plant scale and year round operation

  21. THANK YOU ! Dr. Manoel Regis Lima Verde Leal CENEA–Centro de Energias Alternativas e Meio Ambiente NIPE/UNICAMP E-mail: regislv@energiabr.org.br

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