Numerical and experimental investigation on co-combustion characteristics of hydrothermally treated municipal solid waste with coal in a fluidized bed

Liang, Lu; Ismail, Tamer M.; Jin, Yuqi; El-Salam, M. Abd; Yoshikawa, Kunio

doi:10.1016/j.fuproc.2016.08.007

Cited by 26 publications

(16 citation statements)

References 59 publications

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“…This HT carbonization process can be used to convert a variety of feedstock to a solid fuel with carbon content similar to lignite at mass yields from 35 to 60%. Currently, many biomass substrates, including cellulose [133], lignocellulosic biomass [134,135], microalgae [136,137], anaerobically digested maize silage [138], municipal solid waste [66,72,112,139], distiller's grains [140], agricultural residues [141], and black liquor [142], have been applied in HT to gain fuels or materials. HT treatment of biomass generates liquid [30,[143][144][145], gaseous (mainly carbon dioxide), aqueous chemicals, and solid biofuel.…”

Section: Hydrothermal (Ht) Treatmentmentioning

confidence: 99%

“…If the fuel co-combusted has a very low volatile content and very high amount of fixed carbon, the ignition temperature would not be considerably affected by blending of HT pretreated MSW because higher activation energy was required to initiate combustion. In a drop tube reactor (DTR), Lu et al [139] studied the co-combustion behaviour of HT pretreated MSW with three kinds of low rank coals, including peat, lignite and sub-bituminous coal, at a blending ratio of 20 wt.%. The results indicated that the coal characteristics significantly affect the properties of gaseous emission and UC.…”

Section: Co-combustionmentioning

confidence: 99%

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Clean solid biofuel production from high moisture content waste biomass employing hydrothermal treatment

et al. 2014

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Our society currently faces three challenges, including resource depletion, waste accumulation and environmental degradation, leading to rapidly escalating raw material costs and increasingly expensive and restrictive waste disposal legislation. This work aims to produce clean solid biofuel from high moisture content waste biomass (bio-waste) with high nitrogen (N)/chlorine (Cl) content by mild hydrothermal (HT) conversion processes. The newest results are summarized and discussed in terms of the mechanical dewatering and upgrading, dechlorination, denitrification and coalification resulting from the HT pretreatment. Moreover, both the mono-combustion and co-combustion characteristics of the solid fuel are reviewed by concentrating on the pollutants emission control, especially the NO emission properties. In addition, the feasibility of this HT solid biofuel production process is also discussed in terms of "Energy Balance and economic viability". As an alternative to dry combustion/dry pyrolysis/co-combustion, the HT process, combining the dehydration and decarboxylation of a biomass to raise its carbon content aiming to achieve a higher calorific value, opens up the field of potential feedstock for lignite-like solid biofuel production from a wide range of nontraditional renewable and plentiful wet agricultural residues, sludge and municipal wastes. It would contribute to a wider application of HT pretreatment bio-wastes for safe disposal and energy recycling.

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Section: Hydrothermal (Ht) Treatmentmentioning

confidence: 99%

Section: Co-combustionmentioning

confidence: 99%

Clean solid biofuel production from high moisture content waste biomass employing hydrothermal treatment

et al. 2014

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“…Muthuraman et al (2010a) found the ignition and carbon burnout of MSW with high ash Indian coal is even better than the Indonesian coal/Indian coal blend which indicated the feasibility for replacing Indonesian coal with MSW. Lu et al (2016) studied the co-combustion of MSW and coal by use of numerical simulation and bubbling fluidized bed (BFB). The results show that the MSW blend ratio can be increased to 30% without major modification of the coalfired BFB reactor and the minimum CO emission was found at the mixing proportion of 20%.…”

Section: Introductionmentioning

confidence: 99%

Co-combustion of municipal solid waste and coal gangue in a circulating fluidized bed combustor

Qin

Zhao

Chen

et al. 2018

Int J Coal Sci Technol

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Mixed incineration of municipal solid waste (MSW) in existing coal gangue power plant is a potentially highefficiency and low-cost MSW disposal way. In this paper, the co-combustion and pollutants emission characteristic of MSW and coal gangue was investigated in a circulating fluidized bed (CFB) combustor. The effect of MSW blend ratio, bed temperature and excess air ratio was detailedly studied. The results show the NO x and HCl emission increases with the increasing MSW blend ratio and the SO 2 emission decreases. With the increase of bed temperature, the CO emission decreases while the NO x and SO 2 emission increases. The HCl emission is nearly stable in the temperature range of 850-950°C. The increase of excess air ratio gradually increases the NO x emission but has no significant effect on the SO 2 emission. The HCl emission firstly increases and then decreases with the increase of excess air ratio. For a typical CFB operating condition with excess air ratio of 1.4, bed temperature of 900°C and MSW blend ratio of 10%, the original CO, NO x , SO 2 and HCl emissions are 52, 181, 3373 and 58 mg/N m 3 respectively.

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“…Municipal solid waste is a complex mixture material with heterogeneous physical composition, which hinders its effective utilization as fuel for co-combustion with coal [7]. To solve the problems related to directly co-combustion of MSW, the pretreatment technology of converting MSW into densified solid fuels could be utilized.…”

Section: Introductionmentioning

confidence: 99%

“…These pretreatment processes are expected to upgrade MSW into highly efficient fuel. It would be very useful especially in countries without waste sorting systems, where organic and inorganic wastes are mixed together [5,7].…”

Section: Introductionmentioning

confidence: 99%

Biochar and pyrolytic gas properties from pyrolysis of simulated municipal solid waste (SMSW) under pyrolytic gas atmosphere

Yan

Zhang

Wibowo

et al. 2020

Waste Dispos. Sustain. Energy

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Municipal Solid Waste (MSW) was converted into high-grade solid fuels (biochar) and gaseous product via thermal pyrolysis under pyrolytic gas atmosphere. The experiment was carried out in a packed-bed reactor at the temperature range of 600-800 °C in both atmospheres of N 2 and pyrolytic gas. Gas, liquid, and solid products were analyzed by gas chromatograph and elemental analysis. Amount of biochar obtained from both atmospheres were not significantly different. CH 4 and CO 2 in pyrolytic gas promoted the release of volatile in the MSW, resulting in lower ratio of VM/FC, ca. 0.13. The atomic ratios of O/C and H/C were around 0.02-0.11 and 0.005-0.035, respectively. These values were equivalent to anthracite coal type. On the other hand, the liquid fuel yield under pyrolytic gas condition was found to be higher, compared with that under N 2 condition. In addition, the enhancement of H 2 and CO production was accompanied by the decrease in CH 4 and CO 2 output. Overall, the operating condition at 800 °C or higher with reaction times longer than 4 min were recommended for production of biochar with fuel qualities approaching anthracite coal. Graphic abstractKeywords Municipal solid waste · Pyrolysis · Pyrolytic gas atmosphere · Biochar * Haryo Wibowo

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Numerical and experimental investigation on co-combustion characteristics of hydrothermally treated municipal solid waste with coal in a fluidized bed

Cited by 26 publications

References 59 publications

Clean solid biofuel production from high moisture content waste biomass employing hydrothermal treatment

Clean solid biofuel production from high moisture content waste biomass employing hydrothermal treatment

Co-combustion of municipal solid waste and coal gangue in a circulating fluidized bed combustor

Biochar and pyrolytic gas properties from pyrolysis of simulated municipal solid waste (SMSW) under pyrolytic gas atmosphere

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