z*h
发帖数: 773 | 1 Any profitable energy or biofuels production depends on a trade-off of
process cost and process efficiency. Cost factors include feedstock cost,
conversion yield, utility consumption, product separation, scale-up
possibility, capital investment and depreciation, taxes, and labors.
Process efficiency mainly depends on theoretical yields and how much
practical yields you can reach at reasonable costs. In fact, fuel quality
is the least important at all. Note: solar energy is not free if you
co | l****g
发帖数: 249 | 2 I see a couple of obstacles of hydrogen as a transportation fuel.
First, it is incompatable with current transportation/storage infrustructure
. A lot government money has to be put in to build such an infrustructure.
Does the government really want to make a commitment to do so, while the
current gasoline infrustructure will exist for the foreseeable future.
Secondly, current gasoline vehicles needs modification to run on hydrogen.
Unless the government is throwing incentives for such a modific
【在 z*h 的大作中提到】
: Any profitable energy or biofuels production depends on a trade-off of
: process cost and process efficiency. Cost factors include feedstock cost,
: conversion yield, utility consumption, product separation, scale-up
: possibility, capital investment and depreciation, taxes, and labors.
: Process efficiency mainly depends on theoretical yields and how much
: practical yields you can reach at reasonable costs. In fact, fuel quality
: is the least important at all. Note: solar energy is not free if you
: co
| z*h
发帖数: 773 | 3 First, it is incompatable with current transportation/storage infrustructure
. A lot government money has to be put in to build such an infrustructure.
Does the government really want to make a commitment to do so, while the
current gasoline infrustructure will exist for the foreseeable future.
==> What you talk about is what most persons believes. In fact, we use
hydrogen carriers like NH3, methanol. The obstacles will be solved easily.
We propose to use carbohydrate as hydrogen carriers. SO in | z*h
发帖数: 773 | 4 What I talk about is to produce hydrogen from carbohydrate and water as
below reaction
C6H10O5 (aqueous) + 7 H2O (l) --> 12 H2 (g) + 6 CO2 (g).
Please check the H prize. No any chemical compounds can meet the requirement
for hydrogen storage. So use of hydrogen carriers will be better solution
NH3 --> 1/2 N2 + 3/2 H2
Methanol + H2O --> H2 + CO2
Among all possible carriers, carbohydrate will be the best due to costs,
efficiency, reaction conditions. |
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