scholarly journals The Waste Recycling of Sugarcane Bagasse-Based Biochar for Biogas Purification

2021 ◽  
Vol 940 (1) ◽  
pp. 012029
Author(s):  
M A Wuri ◽  
A Pertiwiningrum ◽  
R Budiarto ◽  
M Gozan ◽  
A W Harto
Keyword(s):  
Carbon Dioxide ◽  
Sugarcane Bagasse ◽  
Natural Zeolite ◽  
Pressure Range ◽  
Room Temperature ◽  
Waste Recycling ◽  
Biomass Waste ◽  
Before And After ◽  
Biogas Purification ◽  
The Difference

Abstract The utilization of the recycling of biomass waste for carbon dioxide (CO2) adsorption in biogas is still rare. Even though the experiments on the biogas purification still using synthetic biogas. This paper investigated the recycling of biomass waste, sugarcane bagasse for biogas purification. The conversion of biomass into biochar was claimed to expand the surface area of its pores for capturing CO2 in biogas. Five treatments of adsorbents used in this study, 100% volume of zeolite or biochar, 75% volume of zeolite and 25% biochar, 50% volume of zeolite and biochar, 25% volume of zeolite and 25% volume of zeolite, and 25% volume of biochar. The difference of volume treatment in adsorbents affected methane (CH4) and CO2 composition of biogas. Biogas purification by adsorption was conducted at 5-7 bar pressure range and room temperature. Biogas before and after purification were tested of CH4 and CO2 composition by gas chromatography. A significant reduction in CO2 was shown when 50% volume of zeolite was replaced by biochar. The highest in CO2 reduction showed by the composition of 50% sugarcane bagasse-based biochar and 50% natural zeolite. The CO2 decreases did not accompany by the CH4 increases because mesopore-sized still dominated the adsorbents’ pore size.

Carbon Capture Performance of Amino-Modified MIL-101 at Room Temperature

2013 ◽  
Vol 395-396 ◽  
pp. 637-640
Author(s):  
Yi Yang ◽  
Zheng Ping Wang ◽  
Ling Meng ◽  
Lian Jun Wang
Keyword(s):  
Carbon Dioxide ◽  
Specific Surface ◽  
Pore Structure ◽  
Carbon Capture ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
Carbon Dioxide Adsorption ◽  
Before And After

MIL-101, a metal-organic framework material, was synthesized by the high-temperature hydrothermal method. Triethylenetetramine (TETA) modification enabled the effective grafting of an amino group onto the surface of the materials and their pore structure. The crystal structure, micromorphology, specific surface area, and pore structure of the samples before and after modification were analyzed with an X-ray diffractometer, scanning electron microscope, specific surface and aperture tester, and infrared spectrometer. The carbon dioxide adsorption properties of the samples were determined by a thermal analyzer before and after TETA modification. Results show that moderate amino modification can effectively improve the microporous structure of MIL-101 and its carbon dioxide adsorption properties. After modification, the capacity of MIL-101 to adsorb carbon dioxide decreased only by 0.61 wt%, and a high adsorption capacity of 9.45 wt% was maintained after six cycles of adsorption testing at room temperature and ambient pressure.

scholarly journals Solubility of menthol in pressurized carbon dioxide: Experimental data and thermodynamic modeling

2006 ◽  
Vol 12 (3) ◽  
pp. 152-158 ◽  
Author(s):  
Anatolii Galushko ◽  
Helena Sovová ◽  
Roumiana Stateva
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Thermodynamic Modeling ◽  
Pressure Range ◽  
Dynamic Method ◽  
The Other ◽  
Melting Point Depression ◽  
Before And After ◽  
Modeling Data ◽  
First Time

The paper reports new experimental data and the results of the thermodynamic modeling of menthol solubility in pressurized CO2. The solubility was measured using the dynamic method and modeled with the Soave-Redlich-Kwong equation of state in the temperature range 30-60?C and pressure range 66-144 bar. The results obtained were compared with the solubility data published by Maier and Stephan and by Sovov? and Jez. The agreement with Maier and Stephan was very good: The deviation of the solubilities, published by Sovov? and Jez, from the other data sources was explained and revised accordingly. The paper also presents for the first time experimental and modeling data for the melting point depression of menthol in the presence of carbon dioxide in the pressure range of interest up to 60 bars. The experimental data was obtained comparing the appearance of menthol particles before and after their exposure to pressurized carbon dioxide.

Effect of Pretreatment on the Properties of Biomass Waste

2011 ◽  
Vol 71-78 ◽  
pp. 2962-2965
Author(s):  
Shou Yu Zhang ◽  
Jian Wang ◽  
Xiu Jun Wang
Keyword(s):  
Catalytic Effect ◽  
Biomass Waste ◽  
Catalytic Gasification ◽  
Fuel Gas ◽  
Acid Washing ◽  
Before And After ◽  
Washing Method ◽  
The Difference ◽  
Gasification Technology ◽  
Environmental Importance

The disposal of biomass waste is of great economic and environmental importance because it can be considered as a sustainable and renewable source of energy. Biomass waste can be converted into H2-rich fuel gas quickly by low temperature catalytic gasification technology. In the paper, fowl manure, a typical biomass waste, was pretreated by washing and the properties of the manure sample before and after pretreatment was investigated. The properties of the manure samples prepared depend strongly on washing method. Nearly all the minerals were removed from the waste by the treatment in the sequence of dilute HCl acid and HF acid washing. The difference in the pyrolysis behaviors of the samples before and after acid washing was ascribed to the changes in the organic components and the minerals present in HC during the pretreatment. A distinct catalytic effect of the minerals contained in CM on its pyrolysis behavior was observed.

Uptake mid Metabolism of Histidine during Stress

1974 ◽  
Vol 52 (9) ◽  
pp. 782-788 ◽  
Author(s):  
Zsuzsanna Huszti ◽  
Theodore L. Sourkes
Keyword(s):  
Carbon Dioxide ◽  
Body Weight ◽  
Room Temperature ◽  
Histidine Decarboxylase ◽  
Intraperitoneal Administration ◽  
Imidazole Ring ◽  
Carboxyl Group ◽  
Decarboxylase Activity ◽  
The Difference ◽  
Histidine Decarboxylase Activity

The rate of formation of expired 14CO2 from histidine, 14C-labeled in the carboxyl group (C-His) or in the imidazole ring (R-His), and also from 14C-ring labeled urocanic acid (R-Uro) has been measured in rats subjected to restraint and cold stress. The rate of expiration of 14CO2 by restrained rats given C-His was significantly increased over control values; that from R-His was decreased. When restrained rats were also exposed to cold (4 °C), the rate of formation of 14CO2 from C-His decreased; that from R-His now showed an even greater decrease than when the measurements were made at room temperature. The rate of formation of labeled carbon dioxide from R-Uro was not altered significantly by these stressful procedures.Parallel measurements of the enzyme activities of histidine catabolism in rats restrained at room temperature for 2 h revealed no alteration in histidase activity of liver and lungs, but there was a marked increase in the histidine decarboxylase activity of stomach. Exposure of rats to cold over 1 h during the restraint of movement also resulted in enhanced histidine decarboxylase activity but of a lesser degree; 2 h of cold exposure during restraint abolished the difference between the control and stressed animals that had been observed at room temperature.The serum histidine concentration was measured 30 min after the intraperitoneal administration of 500 mg of histidine per kilogram body weight to rats. Both groups of stressed animals (restraint at room temperature, restraint in the cold) had much higher levels than observed in the corresponding controls. These results suggest that the increased histidine decarboxylase activity of stomach that develops under the stress of restraint is associated with a compensatory decrease in the rate of histidine uptake from the blood into the tissues. The data obtained for the rate of formation of expired 14CO2 have been interpreted in this light.

scholarly journals Simulate The Process of Preparing Biochar By Pyrolysis of Biomass Via Aspen Plus And Evaluate Its Economic

2021 ◽  
Author(s):  
Yanbing Liu ◽  
Zongyuan Zhu ◽  
Jiaqi Zhang ◽  
Xinglin Yang
Keyword(s):  
Pore Structure ◽  
Rice Straw ◽  
Sugarcane Bagasse ◽  
Life Cycle Cost ◽  
Raw Materials ◽  
Aspen Plus ◽  
Biomass Waste ◽  
Hypoxic Conditions ◽  
The Difference ◽  
The Cost

Abstract China is a big agricultural country and generates a lot of biomass waste every year. Biomass is the only renewable carbon source. Biochar can be produced by pyrolysis under anaerobic or hypoxic conditions. Biochar has a rich pore structure, large specific surface area and special adsorption properties, and has been widely used in different industries. Different raw materials and pyrolysis temperature will have different effects on the yield and pore structure of Biochar. During our research, a flow chart was established in Aspen Plus V8.4 software to simulate the pyrolysis process of rice straw and sugarcane bagasse, and the feasibility of the model was verified through experiment. The results show that the simulated value of biochar yield is different from the experimental value. The difference is small at low temperature (300-500℃), and larger at high temperature (600-800℃), but both remain between 0.55% and 13.11%. Finally, the Life Cycle Cost (LCC) method was used to evaluate the economics of the process of preparing biochar from 1 t rice straw and sugarcane bagasse. The cost of rice straw and sugarcane bagasse biochar were 0.79 and 0.93 USD/kg, respectively. Considering from the aspects of yield, pore structure, energy consumption, and economy of biochar, compared with sugarcane bagasse, rice straw has a more competitive advantage in the preparation of biochar.

scholarly journals On the effect of temperature on carbon-dioxide assimilation

1904 ◽  
Vol 72 (477-486) ◽  
pp. 355-356 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Effect Of Temperature ◽  
Carbon Dioxide Assimilation ◽  
Glass Chamber ◽  
Before And After ◽  
The Difference ◽  
Cherry Laurel ◽  
A Current

1. The CO 2 -assimilation of single cherry-laurel leaves has been determined through a range of temperature from - 6° to 45° C. The amount of CO 2 assimilated has been arrived at by the difference between the CO 2 -content of a current of air before and after passing through the illuminated glass chamber containing the leaf.

scholarly journals ADSORPTION OF AFLATOXIN B1 IN CORN ON NATURAL ZEOLITE AND BENTONITE

2012 ◽  
Vol 12 (3) ◽  
pp. 279-286 ◽  
Author(s):  
Nuryono Nuryono ◽  
Ali Agus ◽  
Sri Wedhastri ◽  
Y.M.S. Maryudhani ◽  
Deni Pranowo ◽  
...  
Keyword(s):  
Particle Size ◽  
Natural Zeolite ◽  
High Performance ◽  
Aqueous Suspension ◽  
Hplc Method ◽  
Elisa Method ◽  
Batch System ◽  
Before And After ◽  
Standard Solution ◽  
The Difference

A study on adsorption of AFB1 in corn (kernel and grained) on natural zeolite and bentonite has been investigated. The first work was adsorption in a batch system of standard AFB1 solution on adsorbents. Some factors such as contact time, concentration of AFB1 and particle size of adsorbent were evaluated. The amount of AFB1 adsorbed was calculated based on the difference of AFB1 concentration before and after adsorption determined by high performance liquid chromatography (HPLC) method. Adsorption of AFB1 in corn sample was emphasized by mixing aqueous suspension of sample with adsorbent. Concentration of AFB1 in suspension was analyzed by enzyme-linked immuno-sorbent assay (ELISA) method. Result shows that adsorption of AFB1 on adsorbents of natural zeolite and bentonite is very fast. Within 15 min 99% of AFB1 (200 ng/mL) has been adsorbed by 25 mg of bentonite and 96% by zeolite. The particle size higher than 200 mesh did not give significant effect on the AFB1 adsorption capability. Effectiveness of zeolite in adsorbing AFB1 is lower than that of bentonite. Capability in reducing AFB1 contamination in corn samples (kernel and meal) for both adsorbents is lower than that in standard solution.

Sweat ammonia excretion during submaximal cycling exercise

1991 ◽  
Vol 70 (1) ◽  
pp. 371-374 ◽  
Author(s):  
D. Czarnowski ◽  
J. Gorski
Keyword(s):  
Room Temperature ◽  
Ammonia Excretion ◽  
Ammonia Concentration ◽  
Ammonia Level ◽  
Bicycle Ergometer ◽  
Plasma Ammonia ◽  
Cold Room ◽  
Before And After ◽  
Total Ammonia ◽  
The Difference

This study was undertaken to investigate whether part of the ammonia formed during muscular exercise was excreted with the sweat. Male medical students volunteered for the experiment. They exercised 30 min on a bicycle ergometer at 80 and 40% of the predetermined maximal O2 uptake (VO2max). Exercise at 80% VO2max was performed twice, at room temperature (20 degrees C) and in a cold room (0 degrees C), whereas exercise at 40% was performed only at room temperature (20 degrees C). Blood was collected from the antecubital vein immediately before and after exercise. Sweat was collected from the hypogastric region by use of gauze pads. It was shown that the plasma ammonia level was elevated after exercise at 80% VO2max and remained stable after exercise at 40% VO2max. The volume of sweat produced during exercise at 80% VO2max at 20 degrees C was 428 +/- 138 ml and at 0 degrees C 245 +/- 86 ml and during exercise at 40% VO2max was 183 +/- 69 ml. The ammonia concentration in the sweat after exercise at 80% VO2max at 20 degrees C was 7,140 mumol/l and at 0 degrees C 11,816 mumol/l. After exercise at 40% VO2max, it was 2,076 mumol/l. The total ammonia lost through the sweat during exercise at 80% VO2max was similar at both temperatures, despite the difference in the sweat volume (at 20 degrees C, 3,360 +/- 2,080 mumol; at 0 degrees C, 3,310 +/- 1,250 mumol). During exercise at 40% VO2max, it was 350 +/- 230 mumol. These results show that part of ammonia formed during exercise is lost with sweat. The amount lost increases with increased work rate and the plasma ammonia concentration.

Use of Natural Zeolite in Systems for Separation and Purification of Gas Mixtures Containing Methane

2017 ◽  
Vol 736 ◽  
pp. 179-182 ◽  
Author(s):  
A.V. Sadchikov ◽  
S.V. Mitrofanov ◽  
V.Y. Sokolov ◽  
S.A. Naumov
Keyword(s):  
Carbon Dioxide ◽  
Water Vapor ◽  
Natural Zeolite ◽  
Pressure Swing Adsorption ◽  
Gas Mixtures ◽  
Separation And Purification ◽  
Biogas Purification ◽  
Adsorption Of Water ◽  
Pressure Swing ◽  
Adsorption Of Water Vapor

The article gives considerations to issues dealing with systems for separation and purification of gas mixtures containing methane. A method of pressure swing adsorption is suggested for biogas purification. The present results show the use of natural zeolite (Izhberdinskoye field, Orenburg region) to improve biogas quality by adsorption of water vapor, hydrogen sulphide and carbon dioxide.

Tem analysis of multiple-energy arsenic implanted and Rta'd silicon

1987 ◽  
Vol 45 ◽  
pp. 246-247
Author(s):  
R.A. Herring
Keyword(s):  
Device Fabrication ◽  
High Concentration ◽  
Tem Analysis ◽  
Defect Clusters ◽  
High Fluences ◽  
Small Defect ◽  
Before And After ◽  
The Matrix ◽  
The Difference ◽  
Factor Type

Rapid thermal annealing (RTA) of ion-implanted Si is important for device fabrication. The defect structures of 2.5, 4.0, and 6.0 MeV As-implanted silicon irradiated to fluences of 2E14, 4E14, and 6E14, respectively, have been analyzed by electron diffraction both before and after RTA at 1100°C for 10 seconds. At such high fluences and energies the implanted As ions change the Si from crystalline to amorphous. Three distinct amorphous regions emerge due to the three implantation energies used (Fig. 1). The amorphous regions are separated from each other by crystalline Si (marked L1, L2, and L3 in Fig. 1) which contains a high concentration of small defect clusters. The small defect clusters were similar to what had been determined earlier as being amorphous zones since their contrast was principally of the structure-factor type that arises due to the difference in extinction distance between the matrix and damage regions.

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