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Related Concept Videos

Green Algae01:21

Green Algae

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Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
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Overview of Algae01:28

Overview of Algae

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The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
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Reduction of Alkenes: Catalytic Hydrogenation02:13

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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
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Advanced microalgae-based renewable biohydrogen production systems: A review.

Rahul Kumar Goswami1, Sanjeet Mehariya2, Parthiba Karthikeyan Obulisamy3

  • 1Bioprocess and Bioenergy Laboratory, Department of Microbiology, Central University of Rajasthan, Rajasthan, India.

Bioresource Technology
|November 5, 2020
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Summary

This review explores microalgae-based biohydrogen production as a sustainable alternative to fossil fuels. It addresses challenges like low yield and high costs, proposing integrated processes for commercial viability.

Keywords:
BiohydrogenIntegrated-biorefinery systemMicroalgaeMicrobial photolysisRenewable energy

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Area of Science:

  • Sustainable Energy
  • Biotechnology
  • Chemical Engineering

Background:

  • Fossil fuel depletion necessitates a transition to renewable energy sources.
  • Biohydrogen (bio-H2) is a clean, high-efficiency fuel produced via various routes.
  • Biological fermentation offers eco-friendly and economical biohydrogen production compared to thermochemical methods.

Purpose of the Study:

  • To propose an integrated microalgae-based biohydrogen production process.
  • To identify strategies for enhancing biohydrogen yield and economic viability.
  • To discuss future research needs for commercialization.

Main Methods:

  • Review of existing biohydrogen production technologies.
  • Analysis of integrated microalgae-based processes.
  • Discussion of advanced strategies for process optimization.

Main Results:

  • Microalgae offer a promising platform for sustainable biohydrogen generation.
  • Process integration is key to overcoming low yield and high production costs.
  • Advanced strategies can significantly improve biohydrogen output and economic feasibility.

Conclusions:

  • An integrated microalgae-based approach presents a viable route for commercial biohydrogen production.
  • Further research and advanced strategies are crucial for optimizing efficiency and reducing costs.
  • This review highlights the potential of biohydrogen as a key renewable energy carrier.