Googling is great. I Google® all the time in my consulting work. I also use
another powerful search engine, which, like Google®, is free. And, if you are
lucky, you will be able to download the full text of any articles you find.
The search engine is ScienceDirect (www.sciencedirect.com).
A demonstration of some of the features in the ScienceDirect search interface
appears below …
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ScienceDirect (www.sciencedirect.com)
demonstration, using dibenzothiophene as an example
You can perform a simple Google® style search on the first ScienceDirect
screen. For example, type …
dibenzothiophene
in the Keywords box. Then click the search icon.
This yields about 9300 results.
To do so, Click Advanced search.
Then type dibenzothiophene
in the Title, abstract or author-specified keywords field.
Click Search
This reduces the number of hits to about 2100.
You can tighten the noose even further. On the left, check the boxes for 2018,
2019, and 2020.
You are now down to about 300 results – 9000 less than the initial results
list.
So, far this is a lot like Googling. Now
for the fun part … accessing the full text of the articles you determine to
be of interest.
If your organization subscribes to ScienceDirect, many of the articles you
identify can be downloaded at no charge to you.
Talk to your librarian if you have any questions.
And, if it turns out that your organization does not subscribe to
ScienceDirect, consider recommending to your librarian AND to your manager that
a subscription will make you a more effective researcher.
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The Goldilocks Rule, Part 3 in the Quest series, is intended to address the
second broad category of online research … Following new developments in your field
The most time-effective way to follow innovative developments in your field is
to create email alerts.
Two of the best places to create these alerts ,..
Google® Scholar (https://scholar.google.com)
ScienceDirect (www.sciencedirect.com)
TIP #1:
The Goldilocks rule
The Goldilocks principle is named by
analogy to the children's story The Three Bears, in which a little girl named
Goldilocks tastes three different bowls of porridge and finds that she prefers
porridge that is neither too hot nor too cold, but has just the right
temperature.
source: https://en.wikipedia.org/wiki/Goldilocks_principle
In the online research context, the Goldilocks rule means designing your search
strategy to yield just the right amount of results … not too many, and not too
few, but just the right amount.
Apply the Goldilocks rule when creating your alerts. That way, you are less
likely to dread wading through all the alerts in your inbox, while still
managing to stay on top of interesting developments.
How to set up alerts in …
Google® Scholar
-
Visit Google® Scholar (https://scholar.google.com/)
-
Perform a search. For example, dibenzothiophene
-
Click the Create alert link, located
in the left hand column of the results page
-
Enter your email address
-
Click the Create alert link
How to set up alerts in …
ScienceDirect
NOTE:
ScienceDirect alerts can be set up for free. But they are especially useful if
your organization subscribes … then you can jump from the abstract to the full
text. Ask your librarian
-
Visit ScienceDirect (https://www.sciencedirect.com/)
-
Perform a search. For example, dibenzothiophene
-
Click the search icon
-
On the results page, click the Set
search alert link
-
Click the Create an account link
(or, if you have registered in the past, enter ID and password)
-
This returns you to the results page
-
Click the Set search alert link
-
Name your alert
-
Click Save
TIP #2:
Read your email alerts every day. If you find them piling up unread, consider
modifying your search statement.
Your purpose is to make yourself aware of important developments, not to do a
literature search. Tips on performing a comprehensive search on your topic will
appear in subsequent posts.
TIP #3:
When you spot an interesting item in your email alert, read it. You may want to
find other papers on that particular topic, or by the paper’s authors.
The September 2017 edition of Hydrocarbon
Engineering has just been issued.
Here is an excerpt from one of the articles in the issue …
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Achieve high, aim low
Andy Huang, Gary Cheng,
Ann Benoit, and Bob Riley, W. R. Grace & Co., USA, explain how refiners can
meet the need for higher octane gasoline while ensuring sulfur content remains
within regulations.
Over the last two decades, the refining
industry has weathered volatile market conditions and increasingly stringent
fuels regulations. In North America, refiners are tasked with meeting
challenging ultra-low sulfur gasoline regulations (Tier 3). Also, as more
turbocharged vehicles enter the market, the demand for premium, higher octane
gasoline will also increase as automakers begin recommending or requiring the
use of higher octane gasoline.
Tier 3 regulations will create challenges as refiners turn to higher gasoline
post-treatment severity for increased desulfurisation, which will negatively
impact octane. Under new regulations, refiners are required to produce gasoline
with an annual average sulfur content of ≤10 ppm, with a maximum gasoline
sulfur cap at the refinery gate of ≤80 ppm. Fluid catalytic cracking (FCC)
naphtha is the main ‘problem stream’, as it comprises 40 – 50 vol% of finished
gasoline volume and contributes 80 – 90% of the total sulfur in the refinery
gasoline pool.
Meeting sulfur limits will require operating adjustments, catalyst formulation
changes, and/or capital investment. Operating strategies that reduce sulfur may
limit gasoline octane, reducing the flexibility of the refinery’s gasoline
blending system. Incremental production from the reformer or alkylation complex
can alleviate some of this pressure, depending on the refinery configuration
and capabilities.
Capital solutions around the FCC include feed and/or product hydrotreating, or
other sulfur removal units. Most refiners have some form of feed and/or product
hydrotreating in place, and these systems are effective at reducing the sulfur
content of gasoline streams. However, there are some tradeoffs; increased
hydrotreating severity can reduce gasoline octane, and octane preservation is a
key feature in the design of these systems. Also, increasing hydrotreating
severity increases the refinery H2 consumption and reduces the hydrotreater run
length. For some, pre-treating FCC feed sufficiently for sulfur minimisation
results in a heat balance challenge for the FCC unit. Some of these challenges
can be exacerbated at refineries using shale-derived crudes, which are
naturally light and produce low sulfur, but also low octane gasoline.
FCC operating strategies include undercutting gasoline for sulfur control, and
control of FCC unit heat balance parameters to ensure that the FCC produces
enough feedstock to keep the alkylation unit full. Often, refiners can face FCC
unit limitations (e.g. wet gas compressor capacity) when pursuing these
changes, but they are quick and often easy to implement.
Written by Andy Huang, Gary Cheng, Ann Benoit, and Bob Riley, W. R. Grace &
Co., USA.
This article was originally published in the September 2017 issue of
Hydrocarbon Engineering. To read the complete article, please sign in or
register for a free trial subscription.
Source: http://palladian-publications.us8.list-manage.com/track/click?u=4f914c3540ccfb267523b9a5e&id=73311129af&e=ebd7465ea9
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TIP:
Remember the distinction between articles that have been peer reviewed, and those that have
not.
As useful as the Hydrocarbon Engineering
articles can be, they have not been peer reviewed. Due diligence requires you
to search databases like ScienceDirect (http://www.sciencedirect.com) and the patent databases for substantive
background information on the technologies featured in Hydrocarbon Engineering.
Search this blog (http://desulf.blogspot.com/)
for posts with due diligence, peer review, and patent search tips and hints.
