Removal of hazardous gaseous pollutants from industrial flue gases by a novel multi-stage fluidized bed desulfurizer

Mohanty, Chitta Ranjan; Adapala, Sivaji; Meikap, B.C.

doi:10.1016/j.jhazmat.2008.10.044

Cited by 30 publications

(13 citation statements)

References 20 publications

(24 reference statements)

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“…%), minimizing further environmental policies issues related to the use of these bio-oils as drop-in biofuels. Although the removal of gaseous reactive pollutants mainly depends on the type of reactor, operating conditions and the chemical nature of the adsorbent used [50], it is generally accepted that at atmospheric pressure and relative high temperature, CaO has the capacity to react with H 2 S to form CaS [51,52], which likely limits the formation of sulphur condensable organic compounds. Moreover, it cannot be totally ruled out that the presence of a relevant content of K, Na and Ca salts in the GSs feedstock could also promote sulphur capture [53].…”

Section: Influence Of Wts and Cao On Liquid Fuel Properties And Chemical Compositionmentioning

confidence: 99%

Catalytic co-pyrolysis of grape seeds and waste tyres for the production of drop-in biofuels

Sanahuja‐Parejo

Veses

Navarro

et al. 2018

Energy Conversion and Management

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Catalytic co-pyrolysis of grape seeds and waste tyres was performed in a fixed-bed reactor using calcined calcite as a catalyst. The organic phase obtained was analysed for its further application as a potential and stable drop-in fuel. Remarkable positive effects were achieved after the joint incorporation of both waste tyres and calcined calcite to grape seeds in the process. More specifically, the addition of considerable amounts of waste tyres (between 20 and 40 wt%) with a constant ratio of feedstock to calcined calcite of 1 were considered the optimal experimental conditions to promote positive synergistic effects on bio-oil yields and its characteristics as a fuel. Thus, when the proportion of waste tyres in the feed reached 40 wt%, the organic phase yield was considerable improved, reaching up values higher than 73 wt%, significantly greater than those obtained from conventional pyrolysis (61 wt%). Moreover, oxygen content was reduced to 4.2 wt%, minimizing any problems related to corrosivity and instability.HHV was enlarged from 15.3 up to 27.3 MJ/kg, significantly increasing the value of the resulting bio-oil. pH values and specially total acid number were also improved reaching values down to 1 mg KOH/g bio-oil in all cases. Additionally, a more valuable chemical composition was achieved since the production of aromatic and cyclic hydrocarbons was maximized, while a significant reduction in phenolic compounds was achieved. Moreover, bio-oil sulphur content was drastically reduced in comparison with the pyrolysis of waste tyres by itself from 0.6 down to 0.2 wt%. The role of calcined calcite was directly related to the promotion of dehydration reactions of acids and phenols in order to generate hydrocarbons. On the other hand, radical interactions between the biomass and waste tyres pyrolysis products played a fundamental role in the production of more valuable compounds. Finally, the CO 2 capture effect produced a more environmentally friendly gas while maintaining its calorific value.

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Section: Influence Of Wts and Cao On Liquid Fuel Properties And Chemical Compositionmentioning

confidence: 99%

Catalytic co-pyrolysis of grape seeds and waste tyres for the production of drop-in biofuels

Sanahuja‐Parejo

Veses

Navarro

et al. 2018

Energy Conversion and Management

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“…Thus, it is hard to reach the general sulfuric acid making (SAM) off-gas level (SO 2 vol% > 4 vol%). Alternatively, H 2 SO 4 -making from low concentration SO 2 tail gas or desulfurization treatment (apply to SO 2 vol% < 1 vol%) is available 19 , but the cost is high. At the same time, the SAM using lean 1~4 vol% SO 2 gas has been a technical bottleneck 18 .…”

Section: Introductionmentioning

confidence: 99%

PbSO4 Reduction Mechanism and Gas Composition at 600–1000°C

Taskinen

Wang

et al. 2021

JOM

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A promising lead-containing wastes recycling method, with sulfur conservation and reductive sulfur-fixing co-smelting process (RSFCS), is proposed. This work investigated the PbSO 4 reduction equilibrium composition, phase conversions, and microscopic transformation mechanisms during the RSFCS process at different temperatures, times, and CO-CO 2 mixtures using thermodynamic modelling, thermogravimetric analysis, x-ray diffraction, and SEM-EDS analysis techniques. At the same time, the gaseous products were collected and analyzed. The results showed that three reduction paths existed: (1) PbSO 4 CO/CO 2 →

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“…By using a complete gas recovery method, these gases, usually flared in conventional methods, could all be gathered and used for other applications such as electricity generation and improved oil recovery (IOR) or could be pressurized to inject into the gas pipelines . As a result, negative environmental effects of fossil fuel production would be reduced and lower amount of greenhouse gases would be emitted (Miles 2001;Mohanty et al 2009;. Moreover, an additional source of energy would be available.…”

Section: Introductionmentioning

confidence: 99%

Integrated asset management: a case study of technical and economic optimization of surface and well facilities

Sarvestani

Goodarzi

Hadipour³

2019

Pet. Sci.

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Oil production could be increased by using optimization techniques in each stage of oil production system from field to production unit. However, the maximum profit will be obtained once integrated optimization of surface and subsurface components of the oil production system is implemented. In addition, when using high-tech equipment and facilities, an integrated study of well and surface facilities affects the economic benefits significantly. In this work, one of the Iranian brown fields (mature or declining production fields) was studied to find the best renovation plan with maximum profits. The base scenario was designed with four stages of separation, and the high-pressure gases from the first and the second separator were planned to be sold, while the low-pressure gases from subsequent stages were supposed to be flared. In this paper, two additional scenarios, namely separator optimization and full optimization, were proposed and 12 cases were defined. In the full optimization scenario, low-pressure gases were prevented from being flared. It was observed that by stopping the flaring systems, gas production rate increases as high as 20% and 150 to 200 MW power will be generated in all cases during the next 20 years. Finally, economic evaluation for all of the cases was done and different cases were compared in terms of incremental annual worth and payback period.

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Removal of hazardous gaseous pollutants from industrial flue gases by a novel multi-stage fluidized bed desulfurizer

Cited by 30 publications

References 20 publications

Catalytic co-pyrolysis of grape seeds and waste tyres for the production of drop-in biofuels

Catalytic co-pyrolysis of grape seeds and waste tyres for the production of drop-in biofuels

PbSO4 Reduction Mechanism and Gas Composition at 600–1000°C

Integrated asset management: a case study of technical and economic optimization of surface and well facilities

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