Analysis of the explosion behaviour of wheat starch/pyrolysis gases hybrid mixtures through experimentation and CFD-DPM simulations

Algae biomass is considered as an alternative raw material for the production of biofuels. The search for new types of raw materials, including high-energy types of microalgae, remains relevant, since the share of motor fuels in the structure of the global fuel and energy balance remains consistently high (about 35%), and the price of oil is characterized by high volatility. The authors have considered the advantages of microalgae as sources of raw materials for fuel production. Biochemical and thermochemical conversion are proposed as technologies for their processing. This paper presents the results of the study of the pyrolysis of the biomass of clonal culture of blue-green microalgae / cyanobacteriumArthrospira platensis rsemsu 1/02-Pfrom the collection of the Research Laboratory of Renewable Energy Sources of the Lomonosov Moscow State University. An experiment to study the process of pyrolysis of microalgae biomass was carried out at the experimental facility of the Institute of High Temperatures RAS in pure nitrogen grade 6.0 to create an oxygen-free environment with a linear heating rate of 10 ºС / min from room temperature to 1000 ºС. The whole process of pyrolysis proceeded in the field of endothermy. The specific amounts of solid residue, pyrolysis liquid and gaseous products were experimentally determined. As a result of the pyrolysis of microalgae biomass weighing 15 g, the following products were obtained: 1) coal has the mass of the solid residue is 2.68 g, or 17.7% of the initial mass of the microalgae (while 9.3% of the initial mass of the microalgae remained in the reactor); 2) pyrolysis liquid – weight 3.3 g, or 21.9% of the initial weight; 3) non-condensable pyrolysis gases – weight 1.15 l. The specific volumetric gas yield (the amount of gas released from 1 kg of the starting material) was 0.076 Nm3/ kg. The analysis of the composition and specific volume yield of non-condensable pyrolysis gases formed in the process of pyrolysis, depending on temperature. It is shown that with increasing temperature, the proportion of highcalorie components of the gas mixture (hydrogen, methane and carbon monoxide) increases. The calorific value of the mixture of these gases has been estimated.

Download Full-text

PREPARATION AND CHARACTERISATION OF ACETYLATED WHEAT STARCH SUPPORTING FOR DIABETES TREATMENT

Journal of Medicine and Pharmacy ◽

10.34071/jmp.2018.5.11 ◽

2018 ◽

Vol 8 (5) ◽

pp. 78-84

Author(s):

Uyen Tran Thi Ngoc ◽

Nam Nguyen Khac ◽

Dung Tran Huu

Keyword(s):

Physicochemical Properties ◽

Resistant Starch ◽

Starch Content ◽

Degree Of Substitution ◽

Wheat Starch ◽

Diabetes Treatment ◽

Glucose Response ◽

Swelling Capacity ◽

Wheat Starches

Background: The purpose of the study was to prepare acetylated wheat starches which have amylase hydrolysis resistant capacity to use as functional food supporting for diabetes treatment. Method: Acetate wheat starches were prepared by acetylation reaction of native wheat starch with different mole ratios of acetic anhydride. These starches were determined for the physicochemical properties by 1H-NMR, SEM, X-ray, DSC, solubility and swelling capacity, the resistant capacity by amylase hydrolysis in-vitro. Results: Acetate wheat starches were prepared successfully with the increase in acetyl content and degree of substitution corresponding with the increase of anhydride acetic, which resulted in the change of physicochemical properties of the wheat starches, including constitution, solubility, swelling capacity and contributed to the increase in resistant starch content in the acetate wheat starches. The AC150-9 containing 2.42% acetyl with degree of substitution 0,094 and resistant starch 32,11% is acceptable by FDA guideline about food safety. Conclusion: Acetate wheat starches contain low rate of digestive starch, while containing a higher proportion of resistant starch than natural wheat starch, possessing a high resistance to amylase activities. Thus, it is hope that this kind of starch to control the rapid increase of postprandual blood glucose response for diabetes treatments effectively. Key words: Acetate wheat starch, substitution, DS, RS, amylase

Download Full-text

Corn Hybrid Mixtures in a Southern Environment 1

Crop Science ◽

10.2135/cropsci1977.0011183x001700040042x ◽

1977 ◽

Vol 17 (4) ◽

pp. 645-646 ◽

Cited By ~ 3

Author(s):

D. L. Thompson

Keyword(s):

Hybrid Mixtures ◽

Corn Hybrid

Download Full-text

Effect of natural fermentation on the structure and physicochemical properties of wheat starch

Carbohydrate Polymers ◽

10.1016/j.carbpol.2019.04.061 ◽

2019 ◽

Vol 218 ◽

pp. 163-169 ◽

Cited By ~ 7

Author(s):

Tong Zhao ◽

Xiaoping Li ◽

Ruizhen Zhu ◽

Zhen Ma ◽

Liu Liu ◽

...

Keyword(s):

Physicochemical Properties ◽

Wheat Starch ◽

Natural Fermentation

Download Full-text

Formation of debranched wheat starch-fatty acid inclusion complexes using saturated fatty acids with different chain length

LWT ◽

10.1016/j.lwt.2021.110867 ◽

2021 ◽

pp. 110867

Author(s):

Min Hyeock Lee ◽

Ha Ram Kim ◽

Woo Su Lim ◽

Min-Cheol Kang ◽

Hee-Don Choi ◽

...

Keyword(s):

Fatty Acids ◽

Fatty Acid ◽

Chain Length ◽

Inclusion Complexes ◽

Saturated Fatty Acids ◽

Wheat Starch

Download Full-text

Industrial Dust Explosions. A Brief Review

Applied Sciences ◽

10.3390/app11041669 ◽

2021 ◽

Vol 11 (4) ◽

pp. 1669 ◽

Cited By ~ 1

Author(s):

Rolf K. Eckhoff ◽

Gang Li

Keyword(s):

Case History ◽

Final Section ◽

Dust Explosion ◽

Research Issues ◽

Industrial Dust ◽

Dust Clouds ◽

Factors Influencing ◽

History Of ◽

Dust Explosions ◽

Hybrid Mixtures

This paper first addresses the question: what is a dust explosion? Afterwards, some specific issues are briefly reviewed: materials that can give dust explosions, factors influencing ignitability and explosibility of dust clouds, the combustion of dust clouds in air, ignition sources that can initiate dust explosions, primary and secondary dust explosions, dust flash fires, explosions of “hybrid mixtures”, and detonation of dust clouds. Subsequently, measures for dust explosion prevention and mitigation are reviewed. The next section presents the case history of an industrial dust explosion catastrophe in China in 2014. In the final section, a brief review is given of some current research issues that are related to the prevention and mitigation of dust explosions. There is a constant need for further research and development in all the areas elucidated in the paper.

Download Full-text

Cereal grain digestion by selected strains of ruminal fungi

Canadian Journal of Microbiology ◽

10.1139/m93-054 ◽

1993 ◽

Vol 39 (4) ◽

pp. 367-376 ◽

Cited By ~ 17

Author(s):

T. A. McAllister ◽

Y. Dong ◽

L. J. Yanke ◽

H. D. Bae ◽

K.-J. Cheng ◽

...

Keyword(s):

Corn Starch ◽

Fungal Growth ◽

Wheat Starch ◽

Cereal Grains ◽

Starch Granules ◽

Starch Digestion ◽

Protein Matrix ◽

Cereal Grain ◽

Neocallimastix Patriciarum ◽

Grain Starch

The ruminal fungi Orpinomyces joyonii strain 19-2, Neocallimastix patriciarum strain 27, and Piromyces communis strain 22 were examined for their ability to digest cereal starch. All strains digested corn starch more readily than barley or wheat starch. Orpinomyces joyonii 19-2 exhibited the greatest propensity to digest starch in wheat and barley, whereas the digestion of these starches by N. patriciarum 27 and P. communis 22 was limited. Media ammonia concentrations were lower when fungal growth was evident, suggesting that all strains assimilate ammonia. Fungi formed extensive rhizoidal systems on the endosperm of corn, but O. joyonii 19-2 was the only strain to form such systems on the endosperm of wheat and barley. All strains penetrated the protein matrix of corn but did not penetrate starch granules. Starch granules from all three cereals were pitted, evidence of extensive digestion by extracellular amylases produced by O. joyonii 19-2. Similar pitting was observed on the surface of corn starch granules digested by N. patriciarum 27 and P. communis 22, but not on wheat and barley starch granules. The ability of ruminal fungi to digest cereal grains depends on both the strain of fungus and the type of grain. The extent to which fungi digest cereal grain in the rumen remains to be determined.Key words: ruminal fungi, cereal grain, starch digestion, ruminant.

Download Full-text