The complete utilization of rice husk for production of synthesis gas

Li, Zhiyu; Jiang, Enchen; Xu, Xinhua; Wu, Zhanxin

doi:10.1039/c7ra04554a

Cited by 21 publications

(6 citation statements)

References 37 publications

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“…The concentration of gas is almost the same as the mold gas. The real pyrolysis volatiles catalytic tests were carried out on a continuous pyrolysis reactor which was used in our previous research . The results are shown in Figure (c).…”

Section: Resultsmentioning

confidence: 99%

“…The gas products were analyzed with GC. Catalytic tests of real pyrolysis volatiles were carried out in a continuous pyrolysis reactor which was used in our previous research, 4 and it combined rice husk pyrolysis and catalytic reforming of pyrolysis volatiles. Both the pyrolysis and catalytic reforming temperatures are 500 °C.…”

Section: ■ Methodsmentioning

confidence: 99%

“…The real pyrolysis volatiles catalytic tests were carried out on a continuous pyrolysis reactor which was used in our previous research. 4 The results are shown in Figure 9(c). The concentration of H 2 is stable at 23%.…”

Section: + → +mentioning

confidence: 97%

“…H 2 from biomass conversion via thermochemical means including pyrolysis and gasification was considered to be the most promising process due to its high conversion efficiency . In China, the yield of rice husk reached 5.65 × 10 8 t in 2016, and the price of rice husk was only 60$/t in China. However, the ratio of high quality utilization of rice husk was low, and most of the rice husk was used as the fuel for direct combustion or thrown away as waste materials. , …”

Section: Introductionmentioning

confidence: 99%

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Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Ren

et al. 2018

ACS Sustainable Chem. Eng.

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A renewable H2 was obtained via catalytic reforming/cracking of rice husk pyrolysis volatiles (RHPV) with the catalyst-employed rice husk pyrolysis carbon (RHPC) as the support. Five differently treated processes such as pyrolysis impregnation (P-I), impregnation pyrolysis (I-P), activation, acid washing (A-W), and calcining in air were employed to improve the catalytic activity and stability of the catalysts. The catalytic activity for bio-oil, gas, and real pyrolysis volatiles was investigated. The role of Fe and Ni was also investigated. The H2 content reached 50% for bio-oil. The catalytic activity and stability were in the following order: 0.1FeNi/RHPC(P-I) > 0.1FeNi/RHPC(A-W) ≈ 0.1FeNi/RHA > 0.1FeNi/RHPC-2(I-P) > 0.1FeNi/AC (active carbon), which is consistent with the results of BET and NH3-TPD. It suggests that the highly active RHPC support catalyst is prepared avoiding pretreatment, activation, and calcination, which makes the preparation procedure of catalysts simple and energy saving. Bio-oil, gas, and real pyrolysis volatiles were employed to investigate the interaction and the catalytic reforming mechanism. Moreover, the characterization of the catalysts showed that the active center is the FeNi nanoalloy, and the RHPC support was an intermediate reductant to keep the stability of the catalyst via reducing the metal oxides.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Methodsmentioning

confidence: 99%

Section: + → +mentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Ren

et al. 2018

ACS Sustainable Chem. Eng.

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“…Globally, in the field of bioenergy, a common procedure to obtain energy from rice husks is using thermochemical processes as direct combustion, pyrolysis, gasification and liquefaction [49]. Various authors [50][51][52][53] identified pyrolysis as the most promising and effective method to obtain energy and create products like bio-char, bio-oil and pyrolysis gas. Manatura et al [54] presented an exergy analysis of combined torrefaction and gasification process on rice husks pellets.…”

Section: Availability Of Paddy Rice Residual Biomass and Possibilities Of Energy Usementioning

confidence: 99%

Energy Potential of Agri Residual Biomass in Southeast Asia with the Focus on Vietnam

et al. 2021

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Southeast Asia currently faces a huge increase in energy consumption and serious environmental issues. A widely underutilized and still unexplored potential of these countries lies in residual biomass. In the present research, the production quantities and energy yields of the most abundant agricultural byproducts in Vietnam, i.e., rice straw, rice husks, sugarcane bagasse and sugarcane trash, were calculated. Total crop yield, residues ratio and net calorific values of the wet basis biomass served as input parameters for the calculations. Moreover, the results were found for individual regions and provinces of the country. The findings show that the production of paddy rice straw is an enormous 97 million tons per year with an energy potential of over 380 TWh, as well as another 9 million tons yearly and 35 TWh in the case of rice husks. More than half of rice biomass production is concentrated in the Mekong River Delta region. Harvesting and processing of sugarcane annually generates about 5 million tons of bagasse and over 3.5 million tons of sugarcane trash with the total energy potential of about 27 TWh, which is primarily available in the central regions of Vietnam. The detailed laboratory determination of fuel-energy properties of studied materials, such as gross and net calorific value, volatile matter, ash and moisture content and contents of chemical elements was also carried out. Based on the research results and literature analysis, the possibilities of biofuel production and energy utilization of the above-mentioned residues are discussed.

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Influence of reaction conditions on the hydrodeoxygenation of light components in bio‐oil to long‐chain alkanes over Ni/HZSM‐5‐γ‐Al₂O₃

Jiang

et al. 2021

Env Prog and Sustain Energy

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A modified γ-Al 2 O 3 -supported nickel-based Ni/HZSM-5 catalyst prepared by the impregnation method was characterized by physical adsorption of N 2 , X-ray diffraction, temperature-programmed desorption of ammonia, thermogravimetric analysis, and scanning electron microscopy. The influence of temperature, pressure, flow, and space velocity on the hydrodeoxygenation (HDO) of light components in bio-oil was studied, and a lifespan test was performed on the Ni/HZSM-5-γ-Al 2 O 3 catalyst. The results showed that at a reaction temperature of 380 C, pressure of 2 MPa, flow rate of 380 ml min −1 , and mass space velocity of 0.78 h −1 , the hydrocarbon content of the upgraded oil was the highest, reaching 89.49%. Long-chain alkanes were the main hydrocarbons in the upgraded oil. The results of a lifespan experiment show the good stability of the Ni/HZSM-5-γ-Al 2 O 3 catalyst in the HDO of bio-oil over 5 h of reaction. The HDO reaction pathway of bio-oil mainly resulted in conversion into long-chain alkanes through a condensation reaction, a decarbonylation/decarboxylation reaction and hydrogenation. This study provides a reference for the preparation of high-quality liquid fuels from biomass. [Correction added on June 18, 2021, after first online publication: 89.47% changed to 89.49%] K E Y W O R D S bio-oil light component, hydrodeoxygenation, long-chain alkane, Ni/HZSM-5-γ-Al 2 O 3 | INTRODUCTIONThe gradually increasing population, urbanization, and industrialization in today's world play a very large role in emphasizing the need for energy. However, regarding present consumption amounts, it is foreseen that fossil fuels, which are the primary energy sources used at the present time, will be diminished in the future. This condition encourages scientists to investigate renewable, sustainable and environmentally friendly alternative energy sources, one of which is biomass. 1 The intensive use of biomass could reduce dependence on fossil fuels. The significant advantage of biomass use lies in the net carbon dioxide emissions to the atmosphere, which are almost zero. 2 Bio-oil production has aroused great attention and sparked extensive interest in recent years. However, bio-oil has deleterious properties, such as high viscosity, thermal instability, corrosiveness, and chemical complexity, which present many obstacles to its application. 3 Current upgrading techniques include hydrodeoxygenation (HDO), 4 catalytic cracking, 5 emulsification, 6 steam reforming, 7 chemical extraction, and esterification. 8 However, more attention has been paid to HDO. 9 The traditional conditions for the hydrotreatment of bio-oil are rather

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The complete utilization of rice husk for production of synthesis gas

Cited by 21 publications

References 37 publications

Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Energy Potential of Agri Residual Biomass in Southeast Asia with the Focus on Vietnam

Influence of reaction conditions on the hydrodeoxygenation of light components in bio‐oil to long‐chain alkanes over Ni/HZSM‐5‐γ‐Al₂O₃

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The complete utilization of rice husk for production of synthesis gas

Cited by 21 publications

References 37 publications

Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Energy Potential of Agri Residual Biomass in Southeast Asia with the Focus on Vietnam

Influence of reaction conditions on the hydrodeoxygenation of light components in bio‐oil to long‐chain alkanes over Ni/HZSM‐5‐γ‐Al2O3

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Influence of reaction conditions on the hydrodeoxygenation of light components in bio‐oil to long‐chain alkanes over Ni/HZSM‐5‐γ‐Al₂O₃