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Gasification of rice husk in a fluid...

Mansaray, Kelleh Gbawuru.

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Gasification of rice husk in a fluidized bed reactor.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Gasification of rice husk in a fluidized bed reactor./
作者:	Mansaray, Kelleh Gbawuru.
面頁冊數:	460 p.
附註:	Source: Dissertation Abstracts International, Volume: 59-10, Section: B, page: 5461.
Contained By:	Dissertation Abstracts International59-10B.
標題:	Engineering, Agricultural. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ31530
ISBN:	0612315304

Gasification of rice husk in a fluidized bed reactor.
Mansaray, Kelleh Gbawuru.

Gasification of rice husk in a fluidized bed reactor. - 460 p.

Source: Dissertation Abstracts International, Volume: 59-10, Section: B, page: 5461.

Thesis (Ph.D.)--DalTech - Dalhousie University (Canada), 1998.

Gasification of rice husks in a dual distributor fluidized bed gasifier using air as the sole gasifying agent was investigated. The study was conducted in four stages: (a) modification of existing fluidized bed gasifier and data acquisition system, (b) preliminary experimentation to assess the suitability of rice husks for gasification, to determine the feasible range of operating conditions for fluidized bed gasification of rice husks and to obtain data for proper design of thermochemical conversion systems, (c) development of mathematical models to predict the performance of the fluidized bed gasification system and (d) experimentation to investigate the effects of various operating variables on the performance of the gasifier and provide data to evaluate the validity of the models.

ISBN: 0612315304Subjects--Topical Terms:

1019504
Engineering, Agricultural.

Gasification of rice husk in a fluidized bed reactor.
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245 1 0 $a Gasification of rice husk in a fluidized bed reactor.
300 $a 460 p.
500 $a Source: Dissertation Abstracts International, Volume: 59-10, Section: B, page: 5461.
500 $a Adviser: A. E. Ghaly.
502 $a Thesis (Ph.D.)--DalTech - Dalhousie University (Canada), 1998.
520 $a Gasification of rice husks in a dual distributor fluidized bed gasifier using air as the sole gasifying agent was investigated. The study was conducted in four stages: (a) modification of existing fluidized bed gasifier and data acquisition system, (b) preliminary experimentation to assess the suitability of rice husks for gasification, to determine the feasible range of operating conditions for fluidized bed gasification of rice husks and to obtain data for proper design of thermochemical conversion systems, (c) development of mathematical models to predict the performance of the fluidized bed gasification system and (d) experimentation to investigate the effects of various operating variables on the performance of the gasifier and provide data to evaluate the validity of the models.
520 $a The physical and chemical properties of rice husks, agglomeration characteristics of inert bed materials in the presence of rice husk ash, and thermal degradation and kinetics of rice husks were determined.
520 $a The agglomeration tests conducted on silica and alumina sand particles in the presence of rice husk ash showed that rice husk ash particles treated at higher particles resulting in soft and friable agglomerates.
520 $a The thermogravimetric analyses (TGA) performed on rice husks at three heating rates (10, 20, and 50 $\ sp\circ $\ sp\circ
520 $a Gasification experiments carried out at three bed heights (19.5, 25.5 and 31.5 cm), three fluidization velocities (0.22, 0.28 and 0.33 m/s) and three equivalence ratios (0.25, 0.30 and 0.35) showed that both the fluidization velocity and equivalence ratio have a major influence on the distribution and yield of products. The fluidization velocity of 0.22 m/s and equivalence ratio of 0.25 appeared to be the optimum conditions with respect to the quality of gas. The mole fractions of the combustible components reached their maximum values at these conditions. A typical gas composition at the fluidization velocity of 0.22 m/s and equivalence ratio of 0.25 was 4% H $\ sb2 $, 5% hydrocarbons (CH $\ sb4 $, C $\ sb2 $\ sb2 $, C $\ sb2 $\ sb4 $ and C $\ sb2 $\ sb6 $) , 15% CO $\ sb2 $, 20% CO and 57% N $\ sb2 $.
520 $a Two mathematical models were developed to simulate the performance of the dual distributor fluidized bed gasifier. The first model has a single parameter (overall carbon conversion) that can be used to improve the fit between predicted and experimental gas compositions. On the other hand, the second model has two parameters (carbon conversion in the core and annular regions) that can be independently adjusted to account for the effect of various operating and design conditions on the composition of the gasification products. The mean error between the predicted and measured product gas composition ranged from 2.45 to 3.05% when the one-compartment model was used. (Abstract shortened by UMI.)
590 $a School code: 1326.
650 4 $a Engineering, Agricultural. $3 1019504
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0539
690 $a 0548
710 2 0 $a DalTech - Dalhousie University (Canada). $3 1251050
773 0 $t Dissertation Abstracts International $g 59-10B.
790 1 0 $a Ghaly, A. E., $e advisor
790 $a 1326
791 $a Ph.D.
792 $a 1998
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ31530