Sulfur removal at high temperature during coal combustion in furnaces: a review

Cheng, Jun; Zhou, Junhu; Liu, Jianzhong; Zhou, Zhijun; Huang, Zhenyu; Cao, Xinyu; Zhao, Xiang; Cen, Kefa

doi:10.1016/s0360-1285(03)00030-3

Cited by 194 publications

(135 citation statements)

References 88 publications

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“…-60/+pan mesh or d p ≤ 0.25 mm), a higher desulfurization capability could be achieved. It was observed that smaller sorbent particles give higher SO 2 reduction and CaO conversion; it even appeared in the pulverized coal combustion [21]. Reducing the desulfurizer diameter from 10 to 1 µm promotes the SO 2 capture from 40 to 50% at Ca/S of 2 [22].…”

Section: Resultsmentioning

confidence: 99%

“…In fact, the sulfation reactions were affected by many operational factors, such as the burning temperature, residence time, SO 2 partial pressure and molar ratio Ca/S. Also, the adsorbent from different sources had different calcination and sulfation performances [21]. In this examination, two of those parameters (i.e.…”

Section: Use Of Green Mussel Shell As a Desulfurizer In The Blendingmentioning

confidence: 90%

“…That reaction has been assumed to happen whenever the untreated core model or the grain model is applied. The second opinion is that the solid reactant moves outwards through the product layer by ionic diffusion, reach SO 2 and O 2 at the outer surface of the CaSO 4 product layer where reaction occurs [21].…”

Section: Use Of Green Mussel Shell As a Desulfurizer In The Blendingmentioning

confidence: 99%

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Use of Green Mussel Shell as a Desulfurizer in the Blending of Low Rank Coal-Biomass Briquette Combustion

Mahidin¹,

Gani²,

Hani³

et al. 2016

MST

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Calcium oxide-based material is available abundantly and naturally. A potential resource of that material comes from marine mollusk shell such as clams, scallops, mussels, oysters, winkles and nerites. The CaO-based material has exhibited a good performance as the desulfurizer or adsorbent in coal combustion in order to reduce SO 2 emission. In this study, pulverized green mussel shell, without calcination, was utilized as the desulfurizer in the briquette produced from a mixture of low rank coal and palm kernel shell (PKS), also known as bio-briquette. The ratio of coal to PKS in the briquette was 90:10 (wt/wt). The influence of green mussel shell contents and combustion temperature were examined to prove the possible use of that material as a desulfurizer. The ratio of Ca to S (Ca = calcium content in desulfurizer; S = sulfur content in briquette) were fixed at 1:1, 1.25:1, 1.5:1, 1.75:1, and 2:1 (mole/mole). The burning (or desulfurization) temperature range was 300-500 °C; the reaction time was 720 seconds and the air flow rate was 1.2 L/min. The results showed that green mussel shell can be introduced as a desulfurizer in coal briquette or bio-briquette combustions. The desulfurization process using that desulfurizer exhibited the first order reaction and the highest average efficiency of 84.5%. AbstrakPemanfaatan Cangkang Kerang Hijau sebagai Desulfurizer dalam Pembakaran Briket Campuran Batubara Peringkat Rendah-Biomassa. Bahan alam berbasis kalsium oksida (CaO) tersedia secara melimpah. Salah satu sumberdaya yang potensial dari bahan alam tersebut berasal dari cangkang moluska laut antara lain kerang, simping (kerang kampak), remis, tiram, keong dan siput (siput terompet). Bahan berbasis CaO tersebut memperlihatkan unjuk kerja yang baik sebagai desulfurizer atau adsorben dalam pembakaran batubara untuk mereduksi emisi SO2. Dalam kajian ini, serbuk cangkang kerang hijau, tanpa kalsinasi, digunakan sebagai desulfurizer dalam produksi briket dari campuran batubara peringkat rendah dan cangkang kelapa sawit (CKS), yang juga dikenal dengan bio-briket. Rasio batubara terhadap CKS dalam briket adalah 90:10 (dalam berat). Pengaruh kandungan cangkang kerang hijau dan temperatur pembakaran dikaji dalam rangka untuk membuktikan kemungkinan pemanfaatan bahan tersebut sebagai desulfurizer. Perbandingan Ca terhadap S (Ca = kandungan kalsium dalam desulfurizer; S = kandungan sulfur dalam briket) ditetapkan sebesar 1:1, 1.25:1, 1.5:1, 1.75:1, dan 2:1 (dalam mol). Temperatur pembakaran (atau desulfurisasi) berkisar antara 300-500 °C; waktu reaksi adalah 720 detik dan laju alir udara ditetapkan pada 1,2 L/menit. Hasil penelitian menunjukkan bahwa cangkang kerang hijau dapat ditambahkan dalam pembakaran briket batubara atau biobriket sebagai desulfurizer. Proses desulfurisasi menggunakan desulfurizer tersebut memperlihatkan reaksi order pertama dan efisiensi penyerapan SO2 rata-rata tertinggi adalah 84,5%.

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Section: Resultsmentioning

confidence: 99%

Section: Use Of Green Mussel Shell As a Desulfurizer In The Blendingmentioning

confidence: 90%

Section: Use Of Green Mussel Shell As a Desulfurizer In The Blendingmentioning

confidence: 99%

See 1 more Smart Citation

Use of Green Mussel Shell as a Desulfurizer in the Blending of Low Rank Coal-Biomass Briquette Combustion

Mahidin¹,

Gani²,

Hani³

et al. 2016

MST

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show abstract

“…The alkaline and alkaline earth components of the coal ashes influence the desulphurization behavior by providing self-desulphurization (Cheng et al, 2003). Table 6 indicates that the alkaline components of Coal B are higher compared to those for Coal A, especially for CaO.…”

Section: Elutriationmentioning

confidence: 99%

“…This result occurs because the coal ashes present CaO in their composition that can react with SO 2 . However, this self-desulphurization mechanism cannot only be predicted by the Ca in the ash composition due to the presence of other alkaline elements that are able to promote self-desulphurization (Cheng et al, 2003).…”

Section: Elutriationmentioning

confidence: 99%

Dolomite Desulfurization Behavior in a Bubbling Fluidized Bed Pilot Plant for High Ash Coal

Gomes

Philipssen

Bard

et al. 2016

Braz. J. Chem. Eng.

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-Although fluidized bed in situ desulphurization from coal combustion has been widely studied, there are aspects that remain under investigation. Additionally, few publications address Brazilian coal desulphurization via fluidized beds. This study used a 250 kWth bubbling fluidized bed pilot plant to analyze different aspects of the dolomite desulphurization of two Brazilian coals. Superficial velocities of 0.38 and 0.46 m/s, flue gas recycling, Ca/S molar ratios and elutriation were assessed. Results confirmed the influence of the Ca/S molar ratio and superficial velocity -SO 2 conversion up to 60.5% was achieved for one coal type, and 70.9% was achieved for the other type. A recycling ratio of 54.6% could increase SO 2 conversion up to 86.1%. Elutriation and collection of ashes and Ca-containing products did not present the same behavior because a lower wt. % of CaO was collected by the gas controlled mechanism compared to the ash.

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Overview of Solid Fuels Combustion Technologies

Vamvuka

2010

Handbook of Combustion

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Energy drives human life and is crucial for continued human development. It is the convertible currency of technology. Without energy the whole fabric of society would crumble. Global demand for energy is rapidly increasing with increasing human population, urbanization, and modernization. This growth is projected to rise sharply over the coming years in developing countries. The world heavily relies on fossil fuels to meet its energy requirements -oil, gas, and coal are providing almost 80% of the global energy demands. Oil and natural gas prices are continuously rising, due to the rapid worldwide increase in their consumption. Coals, covering about 65% of the proven fossil fuel reserves and being widely distributed throughout the world, provide stability in price and availability and will therefore play a major role in the global energy system in the coming decades. Furthermore, given the energy crisis, the development and use of renewable energy sources is one of the key challenges in the shorter and medium term to substitute fossil fuels, to provide commercially attractive options for meeting specific energy service needs, and to mitigate greenhouse gas emissions. Biomass, including all kinds of materials that were directly or indirectly derived not too long ago from contemporary photosynthesis reactions, such as vegetable matter and its derivatives, is a widely dispersed, naturally occurring carbon resource with great energy potential. It is also considered as a CO 2 -neutral energy source. The simple act of burning biomass to obtain heat and often light is one of the oldest biomass conversion processes known to mankind.Thus, the study of coal and biomass combustion for power generation or heating processes is of extreme importance, if we are to conserve our sources of energy, while achieving the required environmental goal efficiently and reliably in a world of increasing population and energy needs. This chapter provides a survey of the technologies that are either available or are being developed to enable all solid fuels to be used cleanly and with greater amenity.

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Sulfur removal at high temperature during coal combustion in furnaces: a review

Cited by 194 publications

References 88 publications

Use of Green Mussel Shell as a Desulfurizer in the Blending of Low Rank Coal-Biomass Briquette Combustion

Use of Green Mussel Shell as a Desulfurizer in the Blending of Low Rank Coal-Biomass Briquette Combustion

Dolomite Desulfurization Behavior in a Bubbling Fluidized Bed Pilot Plant for High Ash Coal

Overview of Solid Fuels Combustion Technologies

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