Environment and economic assessment of hydrogen production from methane and from ethanol

The demand for fossil fuel increased year by year but the sources of fossil fuel is decreasing. Nowadays, researchers are looking at alternative energy sources to reduce the dependency on fossil fuel. Hydrogen is an interesting energy source alternative to be studied. The aim of this study is to per...

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Main Author:	Umarul Imran, Amran
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/25553/1/Environment%20and%20economic%20assessment%20of%20hydrogen%20production.pdf
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spelling	my-ump-ir.255532021-08-12T03:58:39Z Environment and economic assessment of hydrogen production from methane and from ethanol 2018-09 Umarul Imran, Amran TP Chemical technology The demand for fossil fuel increased year by year but the sources of fossil fuel is decreasing. Nowadays, researchers are looking at alternative energy sources to reduce the dependency on fossil fuel. Hydrogen is an interesting energy source alternative to be studied. The aim of this study is to perform environmental and economic assessment for two hydrogen production pathways namely from methane (Case 1) and ethanol (Case 2). Rigorous simulation of both processes was done using Aspen Plus version 8.6. The reaction of steam reforming from methane and ethanol were kinetic based simulation. The kinetic data was obtained from the literature. The reactions were modelled using RPlug blocks with rearranged Langmuir-Hinselwood-Hougen-Watson (LHHW) kinetic model and power law kinetic model. The purification of hydrogen was based on rigorous model in the simulation. The validation results show good agreement with results found in the literature. In addition, sensitivity analysis was carried out observing the effect of several parameters such as temperature, pressure, catalyst weight and feed ratio to the reactor performance for both cases. After that, environment and economic assessment were performed. The data obtained were used for comparison purposes. The environment assessment was based on life cycle assessment (LCA) to evaluate the environmental impact of all processes involved in hydrogen production using GaBi software based on ReCiPe method. The LCA functional unit used for both case studies was 1 kg of hydrogen. Overall, 16 categories impact assessment were carried out and only three were highly significant namely climate change, fossil depletion and water depletion. Case 2 shows high impact on climate change with 30.84 kg CO2 eq compared to Case 1 with 9.44 kg CO2 eq. On the other hand, Case 2 shows higher fossil fuel resource depletion with 12.54 kg oil eq compared to Case 1 with 4.044 kg oil eq. Furthermore, Case 2 also has a higher water resources depletion of 23.35 m3 eq. compared to Case 1 which is only 4.01 m3 eq. The capital cost for Case 1 is 7.92% less compared to Case 2. Meanwhile, the total utilities cost for Case 1 is 12.81% less compared to Case 2. In conclusion, the hydrogen production from methane, Case 1, is environmental friendlier and less costing in term of CAPEX and OPEX than Case 2.. 2018-09 Thesis http://umpir.ump.edu.my/id/eprint/25553/ http://umpir.ump.edu.my/id/eprint/25553/1/Environment%20and%20economic%20assessment%20of%20hydrogen%20production.pdf pdf en public masters Universiti Malaysia Pahang Faculty of Chemical & Natural Resources Engineering
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Umarul Imran, Amran Environment and economic assessment of hydrogen production from methane and from ethanol
description	The demand for fossil fuel increased year by year but the sources of fossil fuel is decreasing. Nowadays, researchers are looking at alternative energy sources to reduce the dependency on fossil fuel. Hydrogen is an interesting energy source alternative to be studied. The aim of this study is to perform environmental and economic assessment for two hydrogen production pathways namely from methane (Case 1) and ethanol (Case 2). Rigorous simulation of both processes was done using Aspen Plus version 8.6. The reaction of steam reforming from methane and ethanol were kinetic based simulation. The kinetic data was obtained from the literature. The reactions were modelled using RPlug blocks with rearranged Langmuir-Hinselwood-Hougen-Watson (LHHW) kinetic model and power law kinetic model. The purification of hydrogen was based on rigorous model in the simulation. The validation results show good agreement with results found in the literature. In addition, sensitivity analysis was carried out observing the effect of several parameters such as temperature, pressure, catalyst weight and feed ratio to the reactor performance for both cases. After that, environment and economic assessment were performed. The data obtained were used for comparison purposes. The environment assessment was based on life cycle assessment (LCA) to evaluate the environmental impact of all processes involved in hydrogen production using GaBi software based on ReCiPe method. The LCA functional unit used for both case studies was 1 kg of hydrogen. Overall, 16 categories impact assessment were carried out and only three were highly significant namely climate change, fossil depletion and water depletion. Case 2 shows high impact on climate change with 30.84 kg CO2 eq compared to Case 1 with 9.44 kg CO2 eq. On the other hand, Case 2 shows higher fossil fuel resource depletion with 12.54 kg oil eq compared to Case 1 with 4.044 kg oil eq. Furthermore, Case 2 also has a higher water resources depletion of 23.35 m3 eq. compared to Case 1 which is only 4.01 m3 eq. The capital cost for Case 1 is 7.92% less compared to Case 2. Meanwhile, the total utilities cost for Case 1 is 12.81% less compared to Case 2. In conclusion, the hydrogen production from methane, Case 1, is environmental friendlier and less costing in term of CAPEX and OPEX than Case 2..
format	Thesis
qualification_level	Master's degree
author	Umarul Imran, Amran
author_facet	Umarul Imran, Amran
author_sort	Umarul Imran, Amran
title	Environment and economic assessment of hydrogen production from methane and from ethanol
title_short	Environment and economic assessment of hydrogen production from methane and from ethanol
title_full	Environment and economic assessment of hydrogen production from methane and from ethanol
title_fullStr	Environment and economic assessment of hydrogen production from methane and from ethanol
title_full_unstemmed	Environment and economic assessment of hydrogen production from methane and from ethanol
title_sort	environment and economic assessment of hydrogen production from methane and from ethanol
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Chemical & Natural Resources Engineering
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/25553/1/Environment%20and%20economic%20assessment%20of%20hydrogen%20production.pdf
_version_	1783732096781516800

Environment and economic assessment of hydrogen production from methane and from ethanol

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