A study on a multi-stage hybrid gasifier-engine system

Bhattacharya, S.C.; Hla, San Shwe; Pham, Hoang-Luang

doi:10.1016/s0961-9534(01)00048-4

Cited by 91 publications

(45 citation statements)

References 6 publications

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“…22 Moreover, the performance of removing tar and dust depends on the composition and amount of tar and dust as well as the gas cleaner used. 23 For the experiment, results confirm that plasma-assisted gasification system produced syngas that is lower than the maximum limit for an internal combustion engine suggested by Bhattacharya et al, 12 and Quakk et al…”

Section: Tar and Dust Contentssupporting

confidence: 73%

“…The total tar and dust contents were quantified by drying the paper filter in an oven at 105°C for about 6 hours. 12 The dried filter then was rinsed with anisole to wash away tar from the filter. The difference in weight of the filter after drying was used to calculate the individual tar and dust contents with respect to the dry gas volume.…”

Section: Experimental Methodsmentioning

confidence: 99%

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The Potential of High Moisture Biomass for Energy Production Using Plasma – Assisted Gasification

Sukthang¹,

Liplap²,

Arjharn³

et al. 2017

Orient. J. Chem

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Gasification of biomass has been widely used for energy production. However, biomass feedstock must be low in moisture (< 20 % w.b.), inevitably requiring drying process which is both energy and time consuming. This paper shows the potential of high-moisture biomass gasifying using plasma arc as an external heat supply. It was found that high-moisture biomass can be used as feedstock in the plasma-assisted gasification process. The plasma arc maintained gasifier temperature high enough for reactions involved. The efficiency of the plasma-assisted gasification system operated with high-moisture biomass was more or less the same with that of conventional gasification operated with low-moisture biomass. When the drying energy was taken into account, the efficiency of the plasma gasification system is 15% higher than that of conventional gasification system. Overall, the plasma-assisted gasification system can be operated with high-moisture biomass efficiently and reduces the processes and energy for biomass preparation.

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Section: Tar and Dust Contentssupporting

confidence: 73%

Section: Experimental Methodsmentioning

confidence: 99%

The Potential of High Moisture Biomass for Energy Production Using Plasma – Assisted Gasification

Sukthang¹,

Liplap²,

Arjharn³

et al. 2017

Orient. J. Chem

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show abstract

“…An average tar value of 10 gm -3 at STP has been reported for fluidised bed gasifiers (Milne et al, 1998). To facilitate the use of the gas obtained in these tests in internal combustion engines, secondary tar reduction measures would therefore be required to reduce the tar loading to the tolerance level of internal combustion engines, reported to range from as low as 1 mgm -3 at STP to 100 mgm -3 at STP (Bhattacharya et al, 2001;Boerrigter and Rauch, 2006;Cao et al, 2006;Han and Kim, 2008;Lettner et al, 2007).…”

Section: Heating Value and End Use Of The Gasmentioning

confidence: 99%

Bubbling fluidised bed gasification of wheat straw–gasifier performance using mullite as bed material

Bhaird

Hemmingway

Walsh

et al. 2015

Chemical Engineering Research and Design

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The adoption of wheat straw as a fuel for gasification processes has been hindered due to a lack of experience and its propensity to cause bed agglomeration in fluidised bed gasifiers.In this study wheat straw was gasified in a small scale, air blown bubbling fluidised bed using mullite as bed material. The gasifier was successfully operated and isothermal bed conditions maintained at temperatures up to 750 °C. Below this temperature, the gasifier was operated at equivalence ratios from 0.1 to 0.26. The maximum lower heating value of the producer gas was approximately 3.6 MJm -3 at standard temperature and pressure (STP) conditions and was obtained at an equivalence ratio of 0.165. In general, a producer gas with a lower heating value of approximately 3 MJm -3 at STP could be obtained across the entire range of equivalence ratios operated. The lower heating value tended to fluctuate, however, and it was considered more appropriate for use in heat applications than as a fuel for internal combustion engines. The concentration of combustibles in the producer gas was lower than that obtained from the gasification of wheat straw in a dual distributor type gasifier and a circulating fluidised bed. These differences were associated with reactor design and, in the case of the circulating fluidised bed, with higher temperatures.Equilibrium modelling at adiabatic conditions, which provides the maximum performance of the system, showed that the gasifier was operating at suboptimal equivalence ratios to achieve greatest efficiencies. The maximum calculated theoretical cold gas efficiency of 73% was obtained at an equivalence ratio of 0.35.

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“…There are various kinds of gasifiers available in the market. Among them, air blown fixed-bed and fluidized-bed gasifiers appear to have several advantages for biomass power systems [5]. The oxidant for the gasification process can be either atmospheric air or pure oxygen.…”

Section: Gasification and Gasifiermentioning

confidence: 99%

Innovative Instrumentation and Analysis of the Temperature Measurement for High Temperature Gasification

Lee¹

2006

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The results show that the ultrasonic approach is one of the best methods to clean the thermocouple tips during the routine operation of the gasifier. In addition, the real time data acquisition system was also designed and applied in the experiments. This advanced instrumentation provided the efficient and accurate data acquisition for this project.In summary, the accomplishment of the project provided useful information of the ultrasonic cleaning method applied in thermocouple tip cleaning. The temperature measurement could be much improved both in accuracy and duration provided that the proposed approach is widely used in the gasification facilities.v

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A study on a multi-stage hybrid gasifier-engine system

Cited by 91 publications

References 6 publications

The Potential of High Moisture Biomass for Energy Production Using Plasma – Assisted Gasification

The Potential of High Moisture Biomass for Energy Production Using Plasma – Assisted Gasification

Bubbling fluidised bed gasification of wheat straw–gasifier performance using mullite as bed material

Innovative Instrumentation and Analysis of the Temperature Measurement for High Temperature Gasification

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