Effect of miscanthus addition and different grinding processes on the quality of wood pellets

Lehmann, Bastian; Schröder, Hans-Werner; Wollenberg, Ralf; Repke, Jens‐Uwe

doi:10.1016/j.biombioe.2012.05.009

Cited by 41 publications

(19 citation statements)

References 45 publications

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“…Konversi biomassa dapat menaikkan nilai kalori per unit volume, mudah disimpan dan diangkut, mempunyai ukuran, dan kualitas yang seragam dari biopelet yang dihasilkan.Faktor utama yang mempengaruhi kekuatan dan ketahanan dari pelet adalah bahan baku, kadar air, ukuran partikel, kondisi pengempaan, penambahan perekat, alat densifilasi, dan perlakuan setelah proses produksi (Lehmann et al 2012).…”

Section: Pendahuluanunclassified

Studi Pengaruh Ukuran Partikel dan Penambahan Perekat Tapioka terhadap Karakteristik Biopelet dari Kulit Coklat (Theobroma Cacao L.) Sebagai Bahan Bakar Alternatif Terbarukan

Damayanti

Lusiana²,

Prasetyo³

2017

Teknotan

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ABSTRAKLimbah kulit kakao dalam jumlah banyak (75% dari dari bahan baku pengolahan coklat) menjadi permasalahan tersendiri pada industri pengolahan coklat. Pemanfaatan kulit kakao berpotensi sebagai bahan bakar alternatif terbarukan karena ketersediaanya yang cukup melimpah dan pemanfaatannya yang belum maksimal. Pemanfaatan kulit kakao sebagai biopelet menjadi salah satu solusi pengolahan kulit kakao yang tepat untuk menghindari masalah baru bagi lingkungan yaitu pembusukan karena adanya penguraian karbon oleh mikroorganisme. Karakteristik kulit kakao yang mengandung lignin sebesar 12-19% menjadikan kulit kakao sangat potensial digunakan sebagai biopelet. Tujuan dari penelitian ini adalah mengetahui pengaruh ukuran partikel dan penambahan tapioka pada pembuatan biopelet kulit kakao, menentukan perlakuan optimal serta melakukan uji karakteristik fisik dan kimia biopelet kulit kakao. Metode eksperimen dengan pengolahan data secara deskriptif kuantitatif dengan membandingkan hasil uji karakteristik biopelet dari variasi ukuran mesh dan variasi kadar perekat (tepung tapioka) untuk mencari kualitas biopelet yang optimal. Perlakuan optimal terjadi pada ukuran partikel biopelet 20 mesh dengan penambahan perekat tapioka 20% dengan kadar air 3,52%, kadar abu 6,99%, dan kerapatan 0,87 g/cm 3 dan nilai kalor 3090,1 kal/g. Pengembangan penelitian dapat diarahkan kepada penambahan campuran bahan baku yang mempunyai nilai kalor tinggi sehingga dapat meningkatkan nilai kalor biopelet yang dihasilkan.Kata kunci : biopelet, kakao, kadar air, kadar abu, nilai kalor ABSTRACT Waste of cocoa shellsare becoming a problem in cocoa processing industry in large quantities (75% of raw material). Cocoa shells are potential as a renewable alternative fuel because of its availability and not exploited yet. The utilization of cocoa shells as biopelet is one of method to convert a cocoa shell as

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Section: Pendahuluanunclassified

Studi Pengaruh Ukuran Partikel dan Penambahan Perekat Tapioka terhadap Karakteristik Biopelet dari Kulit Coklat (Theobroma Cacao L.) Sebagai Bahan Bakar Alternatif Terbarukan

Damayanti

Lusiana²,

Prasetyo³

2017

Teknotan

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“…However, the wide application of this material is restricted by the high costs associated with densification, transportation, thermo-chemical pretreatment and conversion [2]. In order to increase the density of lignocellulosic biomass, it is typically compressed into pellets or briquettes [3]; however, the characteristics of compressed, low-density material, such as Miscanthus straw, has not been fully explored [4].…”

Section: Introductionmentioning

confidence: 99%

Algal Biomass as a Binding Agent for the Densification of Miscanthus

Thapa

Johnson

Liu

et al. 2014

Waste Biomass Valor

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Purpose: Lignocellulosic biomass has been regarded as an important future energy source due to its excessive availability; however, the wide application of this material for many applications is restricted by the high costs associated with densification, transportation, thermo-chemical pretreatment and conversion. In order to increase the density of lignocellulosic biomass, it is typically compressed into pellets or briquettes. This frequently requires the addition of additives, which may negatively impact the economics of the process. Environmentally-friendly binding agents that can be obtained inexpensively are therefore desirable. This study examines the change in physicochemical properties of densified Miscanthus straw where algae were used as a binding agent. Methods: The algae (Rhizoclonium spp.) was obtained as a waste product from a local algal-based wastewater treatment system, dried and then added as a fine powder to milled Miscanthus. The material was then compressed into discs using a mounting press, which were then assessed for calorific value, compressive strength and sugar content. Results: We found that the algae-Miscanthus discs with blends of up to 30% algae had similar calorific values compared to Miscanthus alone (17.4 MJ kg-1), with significantly reduced calorific values at higher blends. Furthermore, Miscanthus discs mixed with algae had significantly greater compressive strength at blends at or above 20% algae content compared to pellets made from 100% Miscanthus (39 N). The strength of the discs was directly proportional to the percentage of algae in the mixture, with a maximum strength of 189 N for blends with 90% algae. The glucose content of blends below 30% was not statistically different than 100% Miscanthus. Conclusions: These data provide support for the use of algae as a binding agent for biomass destined for bioenergy and bioproduct processes, and highlight an additional end use for algal biomass.

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“…It is clear that the traditionally used woody raw materials are not enough to meet the future needs (Stelte et al, 2012) without importing pellets, and different studies have shown an increasing interest towards alternative biomass (Carone et al, 2011;Saidur et al, 2011;Chico-Santamarta et al, 2012;Lehman et al, 2012;Verma et al, 2012;Carvalho et al, 2013;Cherney and Verma, 2013;Liu et al, 2014;Nunes et al, 2014). Agricultural by-products such as straw, pruning residues and other agricultural residues are a promising low-cost resource for pellet production (Mediavilla et al, 2009;Carone et al, 2011;Miranda et al, 2011;Chico-Santamarta et al, 2012;Liu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Vineyard pruning residues pellets for use in domestic appliances: a quality assessment according to the EN ISO 17225

Zanetti¹,

Brandelet²,

Marini³

et al. 2017

J Agricult Engineer

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Nowadays many types of biomass are studied to satisfy the increased demand of renewable energy based on pellet combustion. However, only a few biomasses fulfil the high quality standard required for pellet used in domestic appliances. European and International standards in force define this quality of non-industrial use of pellets in term of the origin of biomass, physical, mechanical and chemical parameters. Vineyard residues are a worldwide potential source of energy but their compliance to be used in domestic pellet stoves has not been yet proven according to the new standards in force. In order to meet this need, this study makes an exhaustive characterisation of vineyard based pellets manufactured from residues of Prosecco (Glera variety) vineyards, assessing both the quality of biofuel and its behaviour during combustion in a domestic pellet stove. The quality of biofuel has been evaluated according to the in force standards for wood and non-woody pellets. The results show that vineyard pellets do not meet the type B quality standards required for non-industrial use of wood pellet mainly because of the high amount of ash content (>2%) and the high amount of copper (>10 ppm) but they fulfil the specifications of the type B non-woody pellets. Furthermore, during combustion test of vineyard-based pellet the high emission of CO indicates incomplete combustion; and vineyard-based pellet NOx emissions are more than double compared to those obtained during the control tests, confirming that the analysed vineyard-based pellets are unsuitable, as they are, for use in traditional pellet stoves.

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Effect of miscanthus addition and different grinding processes on the quality of wood pellets

Cited by 41 publications

References 45 publications

Studi Pengaruh Ukuran Partikel dan Penambahan Perekat Tapioka terhadap Karakteristik Biopelet dari Kulit Coklat (Theobroma Cacao L.) Sebagai Bahan Bakar Alternatif Terbarukan

Studi Pengaruh Ukuran Partikel dan Penambahan Perekat Tapioka terhadap Karakteristik Biopelet dari Kulit Coklat (Theobroma Cacao L.) Sebagai Bahan Bakar Alternatif Terbarukan

Algal Biomass as a Binding Agent for the Densification of Miscanthus

Vineyard pruning residues pellets for use in domestic appliances: a quality assessment according to the EN ISO 17225

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