Currently, the primary biomass for commercial production of bioethanol in the United States is correct answers corn
Which of the following feedstock is typically used to produce biodiesel commercially in the United States? correct answers soybean oil
The heating value of a wood at 45% moistur...
BBE 1002 Exam II (100% Errorless Answers)
Currently, the primary biomass for commercial production of bioethanol in the United States is correct answers corn
Which of the following feedstock is typically used to produce biodiesel commercially in the United States? correct answers soybean oil
The heating value of a wood at 45% moisture content (wet basis) is _______________ the heating value of the same wood at moisture free. correct answers 55%
Based on what you learned, which of the following pairs is desirable for second-generation bioethanol production based on enzymatic saccharification?
a. High lignin content and low specific gravity
b. High hemicelluloses content and high lignin content Partially correct
c. High cellulose content and low specific gravity
d. High cellulose content and high hemicelluloses content correct answers D
Pines are resinous softwood while hardwood are non-resinous. Which of the following is true?
A. The higher heating value of pines is larger than the higher heating value of hardwood
B. The higher heating value of hardwood is the same as the higher heating value of pines
C. The higher heating value of hardwood is larger than the higher heating value of pines
D. Insufficient information to conclude because we need the moisture content to know their higher heating values. correct answers a
Which of the following is a first generation biofuel?
A. Dimethyl ether produced from syngas B. Cellulosic ethanol
C. Bio-butanol
D. Corn ethanol correct answers D
Which of the following pairs can be used as feedstock for producing cellulosic ethanol?
a. Corn grain (kernel) and corn cobs
b. Corn grain (kernel) and corn stover (residues after harvesting corn) c. Corn cobs and corn stover d. Corn grain (kernel) and sugarcane correct answers b
Advantage of biofuels correct answers -reduction of imported crude oil
-renewability
-rural development
-use of waste material
-reduction in greenhouse gas emissions
Disadvantages of biofuels correct answers -drives up food prices possibly
-energy intensive production -runoff of agrochemicals to water
-use of limited water supplies
-threatened and endangered species
-increased soil erosion
-land conversion effects
-introduction of invasive species
First Generation Biofuels correct answers -dominantly biodiesel ethanol -aimed at use for engines and distribution systems -just wanna burn something different
-US & Brazil are leaders -take sugar or starch and turning ethanol into biodiesel -conflict w/food security
Where is biomass mostly located/grown and why? correct answers Midwest - has most farms
In the US in 2015, _____% of corn went to produce biofuels. This is ___% of agricultural land in
the US. correct answers 40, 12
T/F Almost all our corn and soybeans are being produced for humans. correct answers False - used for agriculture or fuels
In switching to biofuels, you increase or decrease initial CO2 emissions in the atmosphere. correct answers Increase
Forest products are not the longest running case in Sustainability Certification. True/False correct answers False - they are the longest running case
In relation to biofuels, private voluntary standards and certification will attempt to... correct answers address multiple trade-offs difficult for gov't policies to address
Bioenergy correct answers derived from biomass and renewable sources of energy
Combustion of biomass generates... correct answers heat
Amount of heat generated depends on.... correct answers moisture content of wood and heating value
Higher Heating Value correct answers total heat generated by complete combustion of ad ry material under controlled conditions
Gross heating value correct answers net heat available from combustion of wood containing moisture in an industrial boiler =Heat value x MC
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Mansanto. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
