Mathematical modelling of water-based biogas scrubber operating at digester pressure

IF 1 Q4 ENGINEERING, CHEMICAL

Chemical Product and Process Modeling Pub Date : 2023-08-30 DOI:10.1515/cppm-2022-0082

S. Saini, M. Rane

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引用次数: 0

Abstract

Abstract The socio-economic feasibility of biogas as a renewable source of energy has been analyzed for the energy security of India. The impact of Indian government schemes such as the National Biogas and Manure Management Programme (NBMMP) for the implementation of Bioenergy has been discussed in detail. The feasibility of a water-based scrubber (high as well as low pressure) for Bio-methane production in the Indian scenario was analyzed. Theoretical modeling for Steady-State Digester Pressure Water-based Biogas Scrubber (DP-WBS) was performed using the Sum Rate Method. Design parameters for a DP-WBS-based scrubber having a capacity of 60 Nm3/h were optimized at the digester pressure of 110 mm of the Water Column (WC). Modeling for raw biogas (CH4 64 %, CO2 30 %, H2S 1000 ppm) scrubbing was done with and without water recirculation. Sensitivity analysis shows that a 90 m3/h water flow rate and a total of 7 theoretical stages are required to reduce the CO2 concentration in biogas from 30 % to <2.58 % and H2S concentration from 1000 ppm to <20 ppm. H2S removal efficiency in the scrubber was found to be highly dependent on operating conditions at the regeneration section.

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在沼气池压力下运行的水基沼气洗涤器的数学模型

摘要:为了印度的能源安全，分析了沼气作为可再生能源的社会经济可行性。印度政府计划，如国家沼气和粪肥管理计划(NBMMP)对生物能源实施的影响已经被详细讨论。分析了水基洗涤器(高压和低压)在印度生产生物甲烷的可行性。采用和速率法对稳态消化池压力水基沼气洗涤器(DP-WBS)进行了理论建模。在水柱压力为110 mm的条件下，优化了容量为60 Nm3/h的dp - wbs洗涤塔的设计参数。对原料沼气(CH4 64 %，CO2 30 %，H2S 1000 ppm)进行建模，并在有无水循环的情况下进行洗涤。敏感性分析表明，要将沼气中CO2浓度从30 %降低到<2.58 %，H2S浓度从1000 ppm降低到<20 ppm，需要90 m3/h的水流量和7个理论级。研究发现，洗涤器中H2S的去除效率高度依赖于再生段的操作条件。

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来源期刊

Chemical Product and Process Modeling ENGINEERING, CHEMICAL-

CiteScore

2.10

自引率

11.10%

发文量

期刊介绍： Chemical Product and Process Modeling (CPPM) is a quarterly journal that publishes theoretical and applied research on product and process design modeling, simulation and optimization. Thanks to its international editorial board, the journal assembles the best papers from around the world on to cover the gap between product and process. The journal brings together chemical and process engineering researchers, practitioners, and software developers in a new forum for the international modeling and simulation community. Topics: equation oriented and modular simulation optimization technology for process and materials design, new modeling techniques shortcut modeling and design approaches performance of commercial and in-house simulation and optimization tools challenges faced in industrial product and process simulation and optimization computational fluid dynamics environmental process, food and pharmaceutical modeling topics drawn from the substantial areas of overlap between modeling and mathematics applied to chemical products and processes.