Separation of carbon dioxide for biogas upgrading to biomethane

Both governmental and international programs support the promotion of biofuels and aim to increase the limit of renewable energy used in the fuel energy balance. Biogas is produced during the anaerobic methane fermentationprocess and it is known as a significant source of renewable energy, contributing to agriculture and environmental protection. Three types of biogas can be distinguished: biogas from sewage sludge, biogas collected from land`fils, andagricultural biogas. There are several possibilities of using upgraded biogas. Biogas can be used in cogeneration systems to provide heat and electricity, in transportation as a motor fuel and in the production of biohydrogen. Biogas upgrading process leads to a product which is characterized by the same parameters as compressed natural gas. Direct biogas use in the production of hydrogen is possible because of prior purification from traces like hydrogen sulfide, except carbon dioxide, by which the reaction can proceed in the desired manner.

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Upgrading biogas using Eburru zeolitic rocks and other adsorbent materials to remove carbon dioxide and hydrogen sulphide

Tanzania Journal of Science ◽

10.4314/tjs.v47i2.2 ◽

2021 ◽

Vol 47 (2) ◽

pp. 421-431

Author(s):

James K Mbugua ◽

Joseph M Mwaniki ◽

Damaris M Nduta ◽

Francis B Mwaura

Keyword(s):

Carbon Dioxide ◽

Natural Zeolite ◽

Steel Wire ◽

Calorific Value ◽

Cow Dung ◽

Total Removal ◽

Biogas Upgrading ◽

Zeolite Rocks ◽

Maize Cobs ◽

Adsorbent Materials

The trace amounts of carbon dioxide and hydrogen sulfide in raw biogas lower its calorific value,cause corrosion and make it hard to compress biogas into the cylinder. Raw biogas was obtainedfrom anaerobic digestion of cow dung and market wastes. The gas was stored in tubes or urine bagbefore upgrading. Natural zeolite rocks, maize cobs, steel wire, desulphurizer, and worn-out tyreswere used as the upgrade materials. The composition of biogas was recorded before and afterupgrading using a GP180 portable biogas analyzer from Henan, China. The measured level of rawbiogas was 0.0227% H2S, >20% CO2 and 52-56% CH4. The most efficient upgrade materials werezeolite rocks with upgrade levels of 89–93% methane. The total removal using zeolite wasobserved to be 75% CO2 and 95.34% H2S. The morphological structures of zeolitic rocks accountfor its higher upgrading properties compared to other materials. In addition, the porosity in theserocks mean that CO2 and H2S were adsorbed resulting in high CH4 levels in the upgraded biogas.Other adsorbents showed upgrading properties with removal rates above 70% for both H2S andCO2. Keywords: Biogas, Upgrading, Natural zeolite, Bio-methane

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Unveiling the critical role of biogas compositions on carbon dioxide separation in biogas upgrading using pressure swing adsorption

Biomass Conversion and Biorefinery ◽

10.1007/s13399-021-02106-4 ◽

2022 ◽

Author(s):

Ammar Ali Abd ◽

Mohd Roslee Othman ◽

Zuchra Helwani

Keyword(s):

Carbon Dioxide ◽

Pressure Swing Adsorption ◽

Critical Role ◽

Biogas Upgrading ◽

Carbon Dioxide Separation ◽

Pressure Swing

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An initial study of biogas upgrading to bio-methane with carbon dioxide capture using ceramic membranes

Catalysis Today ◽

10.1016/j.cattod.2020.11.006 ◽

2020 ◽

Author(s):

Priscilla Ogunlude ◽

Ofasa Abunumah ◽

Ifeyinwa Orakwe ◽

Habiba Shehu ◽

Firdaus Muhammad- Sukki ◽

...

Keyword(s):

Carbon Dioxide ◽

Carbon Dioxide Capture ◽

Ceramic Membranes ◽

Initial Study ◽

Biogas Upgrading

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A review of chemical absorption of carbon dioxide for biogas upgrading

Chinese Journal of Chemical Engineering ◽

10.1016/j.cjche.2016.05.006 ◽

2016 ◽

Vol 24 (6) ◽

pp. 693-702 ◽

Cited By ~ 58

Author(s):

Fouad R.H. Abdeen ◽

Maizirwan Mel ◽

Mohammed Saedi Jami ◽

Sany Izan Ihsan ◽

Ahmad Faris Ismail

Keyword(s):

Carbon Dioxide ◽

Chemical Absorption ◽

Biogas Upgrading

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Storage of carbon dioxide captured in a pilot-scale biogas upgrading plant by accelerated carbonation of industrial residues

Energy Procedia ◽

10.1016/j.egypro.2011.02.469 ◽

2011 ◽

Vol 4 ◽

pp. 4985-4992 ◽

Cited By ~ 35

Author(s):

Renato Baciocchi ◽

Andrea Corti ◽

Giulia Costa ◽

Lidia Lombardi ◽

Daniela Zingaretti

Keyword(s):

Carbon Dioxide ◽

Pilot Scale ◽

Accelerated Carbonation ◽

Biogas Upgrading ◽

Industrial Residues

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Comparative evaluation of the effect of pore size and temperature on gas transport in nano-structured ceramic membranes for biogas upgrading

WEENTECH Proceedings in Energy ◽

10.32438/wpe.8319 ◽

2019 ◽

pp. 195-205

Author(s):

Priscilla Ogunlude ◽

Ofasa Abunumah ◽

Ifeyinwa Orakwe ◽

Habiba Shehu ◽

Firdaus Muhammad-Sukki ◽

...

Keyword(s):

Carbon Dioxide ◽

Weather Conditions ◽

Ceramic Membranes ◽

Daily Basis ◽

Operating Conditions ◽

Emissions Reduction ◽

Biogas Upgrading ◽

Compact Structure ◽

Greenhouse Emissions ◽

Agricultural Household

As a result of rising economies and environmental constraints, the demand for clean and renewable sources of energy is fast increasing. Biogas is a renewable form of energy that fits all expectations in terms of delivery, cost, and greenhouse emissions reduction. Biogas utilization is advantageous because it is a means of creating wealth from daily human, agricultural, household and municipal waste that could otherwise be polluting the environment as waste is deposited on a daily basis which are potential biogas sources; it is not dependent on weather conditions as other renewable forms (solar and wind). Biogas can also be compressed, stored and transported, and therefore easily responds to changes in demand. This paper entails the use of nano-structured membranes to upgrade biogas (which contains primarily methane and carbon dioxide). The benefits of membranes include their compact structure and ease of usage with low maintenance, their low running costs and minimal loss of the upgraded gas. 15nm, 200nm and 6000nm membranes were used to ascertain the flux of the model biogas mixture passing through it under various operating conditions. In each case, the exit flowrate of methane was higher than that of carbon dioxide and this is attributed to the pore sizes of the membrane and its ability to filter the heavier gases. The results show that the molecular weight of the gases also play a role in their permeation rate as it follows the Knudsen regime.

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Pengaruh Tekanan Dan Tahap Kompresi Dalam Pemurnian Biogas Menjadi Biometana Dengan Absorpsi CO2 Menggunakan Air Bertekanan

Indo J Chem Res ◽

10.30598/10.30598//ijcr.2020.8-ang ◽

2020 ◽

Vol 8 (1) ◽

pp. 1-5

Author(s):

Anggit Raksajati ◽

Tri Partono Adhi ◽

Danu Ariono

Keyword(s):

Carbon Dioxide ◽

Ammonia Nitrogen ◽

Co2 Absorption ◽

Biogas Upgrading ◽

Optimum Pressure ◽

Compression Stage ◽

Biogas Purification ◽

Purification Unit ◽

Palm Oil Mill ◽

Carbon Dioxide Co2

Palm oil mill effluent (POME) from condensate stew, hydrocyclone water, and sludge separator contains organic carbon with a COD more than 40 g/L and a nitrogen content of about 0.2 and 0.5 g/L as ammonia nitrogen and total nitrogen. At present, the POME is converted into biogas using anaerobic ponds. Biogas produced contains 60% methane (CH4) and 40% carbon dioxide (CO2) and can be purified into biomethane through CO2 absorption using water. This study evaluates the optimum pressure and feed compression stage in biogas upgrading into biomethane. The results show the rate of circulation of water needed to separate CO2 from biogas feed decreases with increasing absorber pressure due to increased solubility of CO2 in water. Water circulation pumps and biogas compressor works increase due to the increase in pressure difference needed. The optimum pressure of the biogas biogas purification unit is within the range of 7-10 bar. At the same absorber pressure, the 1 stage feed compression unit is cheaper than that of 2 stages. However, the overall process with 1 compression stage might not be more economical than the 2-stage if consider the higher methane loss.

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