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Zulhelmi Amir

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Articles

Diamine-Crosslinked and Blended Polyimide Membranes: An Emerging Strategy in Enhancing H2/CO2 Separation

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By Zulhelmi Amir, Nur Awanis Hashim, Hanee Farzana Hizaddin, Abdul Ahmad
| MDPI
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
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Effect of Temperature, Salinity, and pH on Nanocellulose-Improved Polymer Gel for Oilfield Water Control

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By Zulhelmi Amir, Sukhbir Singh, Harjeet Kaur, Previnah Loganathan
| MDPI
1. Introduction Excessive water production is a persistent challenge in the oil and gas industry, particularly in mature reservoirs where water–oil ratios (WORs) often exceed 4:1 and, in some cases, even reach values as high as 7:1 [1]. This excessive water reduces oil recovery efficiency, increases operational costs, and places additional strain on water treatment systems.
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Elaeis guineensis leaves for potential renewable sub‐bituminous coal: Optimization of biochar yield by response surface methodology and product characterization

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By Chung-Hung Chan, Zulhelmi Amir, Rozita Yusoff
| Wiley Online Library Verified
Conflict of interest The authors declare that the research presented in this study was not influenced by any known financial or personal conflicts of interest. Supporting Information Filename Description bbb2560-sup-0001-AppendixS1.docxWord 2007 document , 903.4 KB Appendix S1. Supporting information. References 1, , , and , Key considerations on the industrial application of lignocellulosic biomass pyrolysis toward carbon neutrality. Engineering 29: 35–38 (2023).
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