Thermal decomposition study on Jatropha curcas L. waste using TGA and fixed bed reactor

2009 ◽  
Vol 85 (1-2) ◽  
pp. 155-162 ◽  
Author(s):  
Viboon Sricharoenchaikul ◽  
Duangduen Atong
Keyword(s):  
Thermal Decomposition ◽  
Jatropha Curcas ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Jatropha Curcas L

scholarly journals Experimental Investigation on the effect of Chemical Pretreatments of Slow-Pyrolyzed Nigerian Jatropha curcas L. Biomass Residues on Pyrolytic oil

2021 ◽  
pp. 4126-4152
Author(s):  
Fatai Abiola Lateef ◽  
Helen Olayinka Ogunsuyi
Keyword(s):  
Jatropha Curcas ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Compositions ◽  
Jatropha Curcas L ◽  
Biomass Residues ◽  
Starting Point ◽  
Bio Oil ◽  
Chemical Pretreatments

In Nigeria, assemblage and discarding of residues from energy crops are increasingly becoming laborious and costly and may pose serious environmental challenges if not correctly managed. The Energy Commission of Nigeria’s long term (2016-2030) plan on the nation’s energy requirements is entirely non-fossil. This is attributable to the global decline of fossil fuel sources, soaring prices, climate crisis and the need to utilize hitherto abundant biomass resources for energy and chemical feedstocks purposes in Nigeria. In this research, an experimental study on the bio-oil generated through slow pyrolysis of Jatropha curcas L. biomass residues – Jatropha curcas L. seed shell (JSS) and Jatropha curcas L. fruit hull (JFH) were realized in a fixed bed reactor at 450 ℃ in a batch-wise step, biomass sample (1.14 mm) particle size, designed by authors. The biomass samples were subjected to pretreatment with 4% sulphuric and sodium hydroxide solutions each respectively. The Chemical compositions and functional groups available in the bio-oil of both raw and pretreated biomasses obtained at 450 ℃ were investigated by Gas Chromatography-Mass Spectrometry (GC-MS) and Fourier Transform- Infrared (FT-IR) spectroscopy analysis respectively. Scanning Electron Microscopy (SEM) was used to look into the residual biomass surface morphology of pretreated and untreated Jatropha curcas L. waste of JSS and JFH. The results acquired disclosed that the bio-oil obtained from JSS and JFH might be a principal liquid fuel starting point and chemical feedstocks.

Catalytic performance and deoxygenation path of methyl palmitate on Ni2P/SiO2 synthesized using the thermal decomposition of nickel hypophosphite

RSC Advances ◽  
2016 ◽  
Vol 6 (37) ◽  
pp. 31308-31315 ◽  
Author(s):  
Qingxin Guan ◽  
Fei Han ◽  
Wei Li
Keyword(s):  
Thermal Decomposition ◽  
Continuous Flow ◽  
Methyl Palmitate ◽  
Fixed Bed ◽  
Catalytic Performance ◽  
Fixed Bed Reactor

Catalytic performance and deoxygenation path of methyl palmitate on Ni2P/SiO2 catalysts were systematically studied in a continuous flow fixed-bed reactor.

Modeling Approach of Thermal Decomposition of Salt-Hydrates for Heat Storage Systems

2013 ◽  
Author(s):  
Armand Fopah Lele ◽  
Fréderic Kuznik ◽  
Holger Urs Rammelberg ◽  
Thomas Schmidt ◽  
Wolfgang K. L. Ruck
Keyword(s):  
Thermal Decomposition ◽  
Heat Storage ◽  
Storage Systems ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
The Finite Element Method ◽  
Modeling Approach ◽  
Measurement Results ◽  
Salt Hydrates ◽  
Physical Phenomena

Heat storage systems using reversible chemical solid-fluid reactions to store and release thermal energy operates in charging and discharging phases. During last three decades, discussions on thermal decomposition of several salt-hydrates were done (experimentally and numerically) [1,2]. A mathematical model of heat and mass transfer in fixed bed reactor for heat storage is proposed based on a set of partial differential equations (PDEs). Beside the physical phenomena, the chemical reaction is considered via the balances or conservations of mass, extent conversion and energy in the reactor. These PDEs are numerically solved by means of the finite element method using Comsol Multiphysics 4.3a. The objective of this paper is to describe an adaptive modeling approach and establish a correct set of PDEs describing the physical system and appropriate parameters for simulating the thermal decomposition process. In this paper, kinetic behavior as stated by the ICTAC committee [3] to understand transport phenomena and reactions mechanism in gas and solid phases is taking into account using the generalized Prout-Tompkins equation with modifications based on thermal analysis experiments. The model is then applied to two thermochemical materials CaCl2 and MgCl2 with experimental activation energies and a comparison is made with TGA-DSC measurement results.

Pertumbuhan Beberapa Genotipe Jarak Pagar (Jatropha Curcas L.) di Tanah Masam

2017 ◽  
Vol 5 (2) ◽  
pp. 251-263
Author(s):  
Indah Retnowati ◽  
Memen Surahman
Keyword(s):  
Jatropha Curcas ◽  
Jatropha Curcas L

Indonesia memiliki banyak  tanah masam, tetapi penggunaan masih sangat sedikit karena kandungan nutrisi tanah masam rendah. Sementara itu, jarak pagar merupakan tanaman yang dapat tumbuh di berbagai jenis tanah (termasuk lahan marjinal) dan penggunaannya sebagai bahan baku biodiesel. Oleh karena itu, perlunya penelitian mengenai pertumbuhan jarak pagar pada tanah masam sebagai upaya untuk mengembangkan jarak pagar dan penggunaannya di Indonesia.Untuk memulai upaya, penelitian tentang berbagai genotipe jarak pagar di tanah masam telah dilakukan. Tujuan dari penelitian ini yaitu mempelajari genotipe jarak pagar  yang berpotensi untuk tanah masam. Penelitian ini dilakukan di UPTD Pengembangan Teknologi Lahan Kering Singabraja, Kecamatan Tenjo, Bogor, Jawa Barat, dari November 2010-Agustus 201. Penelitian ini menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) dengan satu faktor yaitu genotipe. Hasil penelitian menunjukkan berbagai perbedaan pada pertumbuhan diantara genotipe-genotipe jarak pagar. Secara umum, ada lima genotipe jarak pagar yang terbaik di tanah masam (pH 5.0) yaitu Medan I-5-1, Dompu, IP-2P-3-4-1, Sulawesi, dan Bima M.

Role of filter media in an anaerobic fixed-bed reactor

1995 ◽  
Vol 31 (9) ◽  
pp. 137-144 ◽  
Author(s):  
T. Miyahara ◽  
M. Takano ◽  
T. Noike
Keyword(s):  
Anaerobic Bacteria ◽  
Fixed Bed ◽  
Methanogenic Bacteria ◽  
The Other ◽  
Fixed Bed Reactor ◽  
Filter Media ◽  
Fixed Bed Reactors ◽  
Attached Bacteria ◽  
The Relationship

The relationship between the filter media and the behaviour of anaerobic bacteria was studied using anaerobic fixed-bed reactors. At an HRT of 48 hours, the number of suspended acidogenic bacteria was higher than those attached to the filter media. On the other hand, the number of attached methanogenic bacteria was more than ten times as higher than that of suspended ones. The numbers of suspended and deposited acidogenic and methanogenic bacteria in the reactor operated at an HRT of 3 hours were almost the same as those in the reactor operated at an HRT of 48 hours. Accumulation of attached bacteria was promoted by decreasing the HRT of the reactor. The number of acidogenic bacteria in the reactor packed sparsely with the filter media was higher than that in the closely packed reactor. The number of methanogenic bacteria in the sparsely packed reactor was lower than that in the closely packed reactor.

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