Energy balance, forecasting of bioelectricity generation and greenhouse gas emission balance in the ethanol production at sugarcane mills in the state of Mato Grosso do Sul

A review of sugarcane bagasse for second‐generation bioethanol and biopower production

“…Cogeneration systems are very common in sugar mills . When using cogeneration systems for first and second generation production simultaneously in different boiler pressures (2.2–9.0 MPa), it was shown that the system using 2.2 MPa achieved a maximum yield of anhydrous ethanol production of 113.7 liters per ton of sugarcane .…”

Bioenergy from stillage anaerobic digestion to enhance the energy balance ratio of ethanol production

“…Significant differences may be observed for this class of energy consumption in the ethanol industry, such that the level of technology employed reflects directly on the energy demand. Inadequate practices for the use of energy in distilleries are strictly related with failures in the systems used to produce steam, including poor preventive maintenance in boilers, low condensate recoveries and inadequate control over the quality of the feedwater entering the boilers (Silalertruksa and Gheewala, 2009;Turdera, 2013). In some cases the energy consumption in distilleries may exceed the energy content of ethanol (21.22 MJ L À1 ) ( Fig.…”

“…One of the main implications of this scenario corresponds to releasing higher amounts of bagasse to other purposes, majoring the production of second generation ethanol (2G-EtOH) (Dias et al, 2011;Moraes et al, 2014). Although such expressive values are potentially attainable, a significant upgrade would be required in the cogeneration-related machinery of distilleries, for both enhancing the generation and avoiding the losses of steam, as previously discussed (Silalertruksa and Gheewala, 2009;Turdera, 2013). For instance, most of ethanol plants in Brazil use low-to-medium pressure boilers (22 bar, 300 C) in bagasse-based cogeneration systems (Souza and Azevedo, 2006;BNDES and CGEE, 2008).…”

Exhaust emissions and conversion efficiency of catalytic converter for an ethanol‐fueled spark ignition engine

“…It is particularly attractive as an alternative fuel because it is a renewable bio‐based resource, and provides the potential to reduce harmful exhaust emissions in spark‐ignition (SI) engines . It can be produced from various plant materials – so‐called biomass – which can reduce greenhouse gas emissions and are available with a relatively stable supply and at a reasonable price . The relatively high production cost of ethanol compared with petroleum fuels was the one of major drawbacks to its use as an automotive fuel in the past.…”