Thermochemical conversion and characterization of cocoa pod husks a potential agricultural waste from Ghana

Abstract Bio-Oils derived from biomass pyrolysis are promising feedstock for the direct production of valuable platform chemicals, fuels and energy from renewable and sustainable resources. Among the numerous technologies utilized for biomass pyrolysis, fast pyrolysis technologies are chosen for liquid products yield maximization, and characterized by short residence times for solids and vapors, operating temperatures in above ≥500 °C and very high heating rates. Inspired by the vast potential of biomass pyrolysis bio-oils, a thermochemical conversion (fast pyrolysis) and characterization of cocoa pod husks, an abundant agricultural biomass waste from Ghana, West Africa, has been investigated and their potential as renewable feedstock for the production of high-value added chemicals determined by analyzing chemical components of the derived bio-oil. GC–MS analysis of the bio-oil indicated that major constituents were 9, 12-octadecadienoic acid and hexadecanoic acid”. Product distributions revealed 58%wt. of bio-oil, 30%wt. of bio-char and 12%wt. of Non-condensable gas (obtained by difference). Ultimate, proximate, structural composition, calorific value and thermogravimetry analyses were also performed on the cocoa pod husks. Elemental analysis showed that the recovered milled cocoa pod husks contained about 7 elements potentially essential for plant growth.

[1]  A. Bridgwater,et al.  Overview of Applications of Biomass Fast Pyrolysis Oil , 2004 .

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

[3]  A. V. Bridgewater,et al.  Biomass fast pyrolysis , 2004 .

[4]  Peter Arendt Jensen,et al.  Pretreatment of straw for power production by pyrolysis and char wash , 2001 .

[5]  A. J. Toft,et al.  A techno-economic comparison of power production by biomass fast pyrolysis with gasification and combustion , 2002 .

[6]  Joo-Sik Kim,et al.  Influence of Reaction Temperature, Pretreatment, and a Char Removal System on the Production of Bio-oil from Rice Straw by Fast Pyrolysis, Using a Fluidized Bed , 2005 .

[7]  J. Azevedo,et al.  Estimating the higher heating value of biomass fuels from basic analysis data , 2005 .

[8]  J. Villaseñor,et al.  Thermogravimetric-mass spectrometric analysis of lignocellulosic and marine biomass pyrolysis. , 2012, Bioresource technology.

[9]  L. Lajide,et al.  The Potential of Cocoa Pods and Plantain Peels as Renewable Sources in Nigeria , 2015 .

[10]  S. Channiwala,et al.  A UNIFIED CORRELATION FOR ESTIMATING HHV OF SOLID, LIQUID AND GASEOUS FUELS , 2002 .

[11]  M. Asadullah,et al.  Production of bio-oil from fixed bed pyrolysis of bagasse , 2007 .

[12]  Ayşe Eren Pütün,et al.  Rice straw as a bio-oil source via pyrolysis and steam pyrolysis. , 2004 .

[13]  Mikko Hupa,et al.  Catalytic pyrolysis of woody biomass in a fluidized bed reactor: Influence of the zeolite structure , 2008 .

[14]  P. Stefani,et al.  Thermogravimetric analysis of composites obtained from sintering of rice husk-scrap tire mixtures , 2005 .

[15]  S. Şensöz,et al.  The effects of different catalysts on the pyrolysis of industrial wastes (olive and hazelnut bagasse). , 2008, Bioresource technology.

[16]  Ayhan Demirbas,et al.  Pyrolysis of ground beech wood in irregular heating rate conditions , 2005 .

[17]  Sai Gu,et al.  A comprehensive review of biomass resources and biofuels potential in Ghana , 2011 .

[18]  Ayşe Eren Pütün,et al.  Fixed-bed catalytic pyrolysis of cotton-seed cake: effects of pyrolysis temperature, natural zeolite content and sweeping gas flow rate. , 2006, Bioresource technology.

[19]  H. Abimanyu,et al.  Conversion of cacao pod husks by pyrolysis and catalytic reaction to produce useful chemicals , 2014 .

[20]  Peter McKendry,et al.  Energy production from biomass (Part 2): Conversion technologies. , 2002, Bioresource technology.

[21]  A. Martin,et al.  Sorption of cadmium (II) ion from aqueous solution onto sweet potato (Ipomoea batatas L.) peel adsorbent: Characterisation, kinetic and isotherm studies , 2016 .

[22]  T. E. Odetoye,et al.  Thermochemical characterisation of agricultural wastes from West Africa , 2013 .

[23]  Dinesh Mohan,et al.  Sorption of arsenic, cadmium, and lead by chars produced from fast pyrolysis of wood and bark during bio-oil production. , 2007, Journal of colloid and interface science.

[24]  Qinghong Zhang,et al.  Selective conversion of cellobiose and cellulose into gluconic acid in water in the presence of oxygen, catalyzed by polyoxometalate-supported gold nanoparticles. , 2012, Chemistry.

[25]  A. Borgna,et al.  Biomass Oxidation: Formyl C-H Bond Activation by the Surface Lattice Oxygen of Regenerative CuO Nanoleaves. , 2015, Angewandte Chemie.

[26]  A. Borgna,et al.  Titania‐Supported Gold Nanoparticles as Efficient Catalysts for the Oxidation of Cellobiose to Organic Acids in Aqueous Medium , 2014 .

[27]  W. Tsai,et al.  Thermochemical characterization of biochar from cocoa pod husk prepared at low pyrolysis temperature , 2018 .

[28]  A. Bridgwater,et al.  An overview of fast pyrolysis of biomass , 1999 .