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Raquel Escrivani Guedes

Bio: Raquel Escrivani Guedes is an academic researcher from Rio de Janeiro State University. The author has contributed to research in topics: Alternative energy & Biomass. The author has an hindex of 1, co-authored 1 publications receiving 253 citations.

Papers
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TL;DR: In this paper, a review on parameters that influence the pyrolysis process, such as temperature, reaction time, heating rate, gas flow rate, feed rate, particle size and biomass composition, is presented.

334 citations


Cited by
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TL;DR: In this article, a review scrutinizes the key roles of biochar as an additive and emphasizes the influences of bio-char characteristics on the anaerobic digestion processes and their capability to address the foremost challenges.

203 citations

Journal ArticleDOI
TL;DR: In this article, a critical review of the effect of the key pyrolysis parameters from lignocellulosic biomass to product distribution is presented, and CO2-based benefits, economic assessment, and technical orientation for biofuel production from biomass are included.

195 citations

Journal ArticleDOI
TL;DR: In this article, the progress of catalysts for improving the hydrocarbon compounds in bio-oil obtained from catalytic pyrolysis of biomass was reported, and the effects of other operating conditions, such as temperature, type of biomass, heating rate, vapors residence time, carrier gas, and hydrogen donor on the yield and properties of biooil have been briefly explored.
Abstract: This paper reports the progress of catalysts for improving the hydrocarbon compounds in bio-oil obtained from catalytic pyrolysis of biomass. In addition, the effects of the other operating conditions, such as temperature, type of biomass, heating rate, vapors residence time, carrier gas, and hydrogen donor on the yield and properties of bio-oil have been briefly explored. Temperature and catalysts type were found to have major impact on the bio-oil yield and quality. TGA-DTA analysis of biomass revealed that major biomasses pyrolysis zone for high bio-oil yield is in the range of 400–600 °C. Pilot, semi-pilot and large-scale units reported an average temperature of 500 °C for pyrolysis of biomass. The development of advanced catalysts such as zeolite-based catalysts, supported transition and noble metal catalysts, and metal oxide catalysts have been designed to remove the undesired compounds and to increase the hydrocarbon yield in bio-oil. Noble metal supported catalysts produced bio-oil with a low content of oxygenated compounds compared to non-noble metal catalysts; however, their cost and accessibility favor the utilization of non-noble metal supported catalysts.

160 citations

Journal ArticleDOI
TL;DR: Three possibilities for the valorisation of exhausted biosorbents loaded with metal ions are examined in order to find the best way to use these cheap materials in accordance with the principles of the circular economy and thereby contributing to the development of sustainable biosorption technology.

147 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the connections between biochar and anaerobic digestion (AD) is presented, focusing on three key issues related to the better understanding of the biochar role in AD processes: 1. Investigation of the influence of BC properties on AD performances and their ability to counteract its main challenges; 2. Assessment of the optimal BC production chain (i.e., feedstock-pyrolysis-activation) to achieve the desired features; and 3. Evaluation of the economic and environmental advantages connected to BC use in AD, compared to conventional solutions applied to
Abstract: Anaerobic digestion (AD) could be considered as a mature technology and nowadays it can still play a pivot role because of the urgent need to provide renewable energy sources and efficiently manage the continuously growing amount of organic waste. Biochar (BC) is an extremely versatile material, which could be produced by carbonization of organic materials, including biomass and wastes, consistently with Circular Economy principles, and “tailor-made” for specific applications. The potential BC role as additive in the control of the many well-known critical issues of AD processes has been increasingly explored over the past few years. However, a clear and comprehensive understanding of the connections between BC and AD is still missing. This review paper analyses and discusses significant references (review articles, research papers and international databases and reports), mostly published in the last 10 years. This review is aimed at addressing three key issues related to the better understanding of the BC role in AD processes: 1. Investigation of the influence of BC properties on AD performances and of their ability to counteract its main challenges; 2. Assessment of the optimal BC production chain (i.e. feedstock-pyrolysis-activation) to achieve the desired features; 3. Evaluation of the economic and environmental advantages connected to BC use in AD processes, compared to conventional solutions applied to address AD challenges.

127 citations