Thermochemical conversion of microalgal biomass into biofuels: a review.

Following first-generation and second-generation biofuels produced from food and non-food crops, respectively, algal biomass has become an important feedstock for the production of third-generation biofuels. Microalgal biomass is characterized by rapid growth and high carbon fixing efficiency when they grow. On account of potential of mass production and greenhouse gas uptake, microalgae are promising feedstocks for biofuels development. Thermochemical conversion is an effective process for biofuel production from biomass. The technology mainly includes torrefaction, liquefaction, pyrolysis, and gasification. Through these conversion technologies, solid, liquid, and gaseous biofuels are produced from microalgae for heat and power generation. The liquid bio-oils can further be upgraded for chemicals, while the synthesis gas can be synthesized into liquid fuels. This paper aims to provide a state-of-the-art review of the thermochemical conversion technologies of microalgal biomass into fuels. Detailed conversion processes and their outcome are also addressed.

[1]  T. Minowa,et al.  A novel microalgal system for energy production with nitrogen cycling , 1999 .

[2]  J. Akhtar,et al.  A review on operating parameters for optimum liquid oil yield in biomass pyrolysis , 2012 .

[3]  A. Bridgwater.  Review of fast pyrolysis of biomass and product upgrading , 2012 .

[4]  Paul Chen,et al.  Catalytic pyrolysis of microalgae and their three major components: carbohydrates, proteins, and lipids. , 2013, Bioresource technology.

[5]  Jacob A. Moulijn,et al.  Catalytic pyrolysis of microalgae to high-quality liquid bio-fuels , 2011 .

[6]  Mark W. Denny,et al.  Discovery of Lignin in Seaweed Reveals Convergent Evolution of Cell-Wall Architecture , 2009, Current Biology.

[7]  Israa K Alghurabie,et al.  Fluidized bed gasification of Kingston coal and marine microalgae in a spouted bed reactor , 2013 .

[8]  Wei Hsin Chen,et al.  Effect of microwave double absorption on hydrogen generation from methanol steam reforming , 2010 .

[9]  Michimasa Kishimoto,et al.  Oil production from algal cells of Dunaliella tertiolecta by direct thermochemical liquefaction , 1995 .

[10]  N. Labbe,et al.  Enhancing the combustible properties of bamboo by torrefaction. , 2011, Bioresource technology.

[11]  H. Atsushi,et al.  Temperature effect on continuous gasification of microalgal biomass: theoretical yield of methanol production and its energy balance , 1998 .

[12]  Chuanping Feng,et al.  Analysis of energy conversion characteristics in liquefaction of algae , 2004 .

[13]  Ayhan Demirbas,et al.  Oily Products from Mosses and Algae via Pyrolysis , 2006 .

[14]  Phillip E. Savage,et al.  Gasification of alga Nannochloropsis sp. in supercritical water , 2012 .

[15]  K. Das,et al.  Comparative Evaluation of Thermochemical Liquefaction and Pyrolysis for Bio-Oil Production from Microalgae , 2011 .

[16]  D. Mohan,et al.  Pyrolysis of Wood/Biomass for Bio-oil: A Critical Review , 2006 .

[17]  Sally L. Homsy,et al.  Fast pyrolysis of microalgae remnants in a fluidized bed reactor for bio-oil and biochar production. , 2013, Bioresource technology.

[18]  Masaru Watanabe,et al.  Catalytic effects of NaOH and ZrO2 for partial oxidative gasification of n-hexadecane and lignin in supercritical water☆ , 2003 .

[19]  A. Bacic,et al.  The charophycean green algae provide insights into the early origins of plant cell walls. , 2011, The Plant Journal.

[20]  Dong Hyun Lee,et al.  A comparative study of bio-oils from pyrolysis of microalgae and oil seed waste in a fluidized bed. , 2014, Bioresource technology.

[21]  Hsien Hui Khoo,et al.  Bioenergy co-products derived from microalgae biomass via thermochemical conversion--life cycle energy balances and CO2 emissions. , 2013, Bioresource technology.

[22]  Keat-Teong Lee,et al.  Microalgae biofuels: A critical review of issues, problems and the way forward. , 2012, Biotechnology advances.

[23]  Yong-Qiang Liu,et al.  Investigation on Pyrolysis of Microalgae Botryococcus braunii and Hapalosiphon sp. , 2012 .

[24]  Philip Owende,et al.  Biofuels from microalgae—A review of technologies for production, processing, and extractions of biofuels and co-products , 2010 .

[25]  Phillip E. Savage,et al.  Hydrothermal catalytic production of fuels and chemicals from aquatic biomass , 2013 .

[26]  Frédéric Vogel,et al.  Catalytic gasification of algae in supercritical water for biofuel production and carbon capture , 2009 .

[27]  Xiaoqian Ma,et al.  A study on experimental characteristic of microwave-assisted pyrolysis of microalgae. , 2012, Bioresource technology.

[28]  Jo‐Shu Chang,et al.  Cultivation, photobioreactor design and harvesting of microalgae for biodiesel production: a critical review. , 2011, Bioresource technology.

[29]  Paul T. Williams,et al.  Catalytic hydrothermal gasification of algae for hydrogen production: composition of reaction products and potential for nutrient recycling. , 2013, Bioresource technology.

[30]  Gerrit Brem,et al.  Assessment of a dry and a wet route for the production of biofuels from microalgae: energy balance analysis. , 2011, Bioresource technology.

[31]  P. Ning,et al.  Catalytic Gasification of Algae Nannochloropsis sp. in Sub/Supercritical Water , 2013 .

[32]  Changwei Hu,et al.  The direct pyrolysis and catalytic pyrolysis of Nannochloropsis sp. residue for renewable bio-oils. , 2010, Bioresource technology.

[33]  U. Karsten,et al.  Intermediate pyrolysis and product identification by TGA and Py-GC/MS of green microalgae and their extracted protein and lipid components , 2013 .

[34]  K. L Kadam,et al.  Environmental implications of power generation via coal-microalgae cofiring , 2002 .

[35]  Rosalam Sarbatly,et al.  Conversion of microalgae to biofuel , 2012 .

[36]  K. Das,et al.  Effect of operating conditions of thermochemical liquefaction on biocrude production from Spirulina platensis. , 2011, Bioresource technology.

[37]  Changyan Yang,et al.  Fast pyrolysis of microalgae to produce renewable fuels , 2004 .

[38]  Li Chun,et al.  Production and characterization of bio-oil from hydrothermal liquefaction of microalgae Dunaliella tertiolecta cake , 2010 .

[39]  H. Bi,et al.  A Study of Particle Size Effect on Biomass Torrefaction and Densification , 2012 .

[40]  Yanna Liang,et al.  Producing liquid transportation fuels from heterotrophic microalgae , 2013 .

[41]  Phillip E. Savage,et al.  Hydrothermal Liquefaction of a Microalga with Heterogeneous Catalysts , 2011 .

[42]  P. Biller,et al.  Potential yields and properties of oil from the hydrothermal liquefaction of microalgae with different biochemical content. , 2011, Bioresource technology.

[43]  Jorge Otávio Trierweiler,et al.  Fast microwave-assisted pyrolysis of microalgae using microwave absorbent and HZSM-5 catalyst. , 2014, Bioresource technology.

[44]  Paul Chen,et al.  Hydrothermal pretreatment of microalgae for production of pyrolytic bio-oil with a low nitrogen content. , 2012, Bioresource technology.

[45]  Phillip E. Savage,et al.  Hydrothermal Liquefaction and Gasification of Nannochloropsis sp. , 2010 .

[46]  Amanda Lea-Langton,et al.  Nutrient recycling of aqueous phase for microalgae cultivation from the hydrothermal liquefaction process , 2012 .

[47]  Po Chih Kuo,et al.  Torrefaction and co-torrefaction characterization of hemicellulose, cellulose and lignin as well as , 2011 .

[48]  P. Biller,et al.  Catalytic hydrothermal processing of microalgae: decomposition and upgrading of lipids. , 2011, Bioresource technology.

[49]  Wei Hsin Chen,et al.  A study on torrefaction of various biomass materials and its impact on lignocellulosic structure simulated by a thermogravimetry , 2010 .

[50]  X. Miao,et al.  High yield bio-oil production from fast pyrolysis by metabolic controlling of Chlorella protothecoides. , 2004, Journal of biotechnology.

[51]  Md. Azhar Uddin,et al.  Hydrogen production from algal biomass via steam gasification. , 2014, Bioresource technology.

[52]  M. Harold,et al.  Fast pyrolysis of microalgae in a falling solids reactor: Effects of process variables and zeolite catalysts , 2012 .

[53]  Tao Yu,et al.  Biodiesel production from lipids in wet microalgae with microwave irradiation and bio-crude production from algal residue through hydrothermal liquefaction. , 2014, Bioresource technology.

[54]  Wei-hsin Chen,et al.  Impact of dilute acid pretreatment on the structure of bagasse for bioethanol production , 2010 .

[55]  Ming-de Yang,et al.  Pyrolysis characteristics and kinetics of the marine microalgae Dunaliella tertiolecta using thermogravimetric analyzer. , 2010, Bioresource technology.

[56]  Prasant Kumar Rout,et al.  Production of first and second generation biofuels: A comprehensive review , 2010 .

[57]  P. Spolaore,et al.  Commercial applications of microalgae. , 2006, Journal of bioscience and bioengineering.

[58]  Wei Hsin Chen,et al.  Pulverized coal burnout in blast furnace simulated by a drop tube furnace , 2010 .

[59]  Qin Chen,et al.  Microwave-assisted pyrolysis of microalgae for biofuel production. , 2011, Bioresource technology.

[60]  Frédéric Vogel,et al.  SunCHem: an integrated process for the hydrothermal production of methane from microalgae and CO2 mitigation , 2009, Journal of Applied Phycology.

[61]  Keng-Tung Wu,et al.  Co-gasification of woody biomass and microalgae in a fluidized bed , 2013 .

[62]  Derk Willem Frederik Brilman,et al.  Catalytic and Non-catalytic Supercritical Water Gasification of Microalgae and Glycerol , 2010 .

[63]  Seth Debolt,et al.  Microalgae as a renewable fuel source: Fast pyrolysis of Scenedesmus sp. , 2013 .

[64]  Keng-Tung Wu,et al.  The characteristics of torrefied microalgae , 2012 .

[65]  Jo‐Shu Chang,et al.  Isothermal and non-isothermal torrefaction characteristics and kinetics of microalga Scenedesmus obliquus CNW-N. , 2014, Bioresource technology.

[66]  D. Barreiro,et al.  Hydrothermal liquefaction (HTL) of microalgae for biofuel production: State of the art review and future prospects , 2013 .

[67]  Benedetta de Caprariis,et al.  Effect of Chlorella vulgaris growing conditions on bio-oil production via fast pyrolysis , 2014 .

[68]  David S Domozych,et al.  The Charophycean green algae as model systems to study plant cell walls and other evolutionary adaptations that gave rise to land plants , 2012, Plant signaling & behavior.

[69]  J L Valverde,et al.  Pyrolysis, combustion and gasification characteristics of Nannochloropsis gaditana microalgae. , 2013, Bioresource technology.

[70]  Sascha R.A. Kersten,et al.  Hydrothermal Treatment (HTT) of Microalgae: Evaluation of the Process As Conversion Method in an Algae Biorefinery Concept , 2012 .

[71]  Wen-Jhy Lee,et al.  Thermogravimetric analysis and kinetics of co-pyrolysis of raw/torrefied wood and coal blends , 2013 .

[72]  Vladimir Strezov,et al.  Thermal characterisation of microalgae under slow pyrolysis conditions , 2009 .

[73]  Jo‐Shu Chang,et al.  Thermal decomposition dynamics and severity of microalgae residues in torrefaction. , 2014, Bioresource technology.

[74]  S. Amin.  Review on biofuel oil and gas production processes from microalgae , 2009 .

[75]  Farid Nasir Ani,et al.  Microwave-assisted pyrolysis of oil palm shell biomass using an overhead stirrer , 2012 .

[76]  S. Channiwala,et al.  A correlation for calculating HHV from proximate analysis of solid fuels , 2005 .

[77]  Xuewu Zhang,et al.  Biodiesel Production by Microalgal Biotechnology , 2018, Renewable Energy.